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console: rename acquire/release_console_sem() to console_lock/unlock()

Browse Source 
The -rt patches change the console_semaphore to console_mutex.  As a
result, a quite large chunk of the patches changes all
acquire/release_console_sem() to acquire/release_console_mutex()

This commit makes things use more neutral function names which dont make
implications about the underlying lock.

The only real change is the return value of console_trylock which is
inverted from try_acquire_console_sem()

This patch also paves the way to switching console_sem from a semaphore to
a mutex.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: make console_trylock return 1 on success, per Geert]
Signed-off-by: Torben Hohn <torbenh@gmx.de>
Cc: Thomas Gleixner <tglx@tglx.de>
Cc: Greg KH <gregkh@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Torben Hohn 2011-01-25 15:07:35 -08:00 committed by Linus Torvalds
parent 3689456b4b
commit ac751efa6a
44 changed files with 336 additions and 328 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/mach-omap2/pm24xx.c
View File

@ -134,7 +134,7 @@ static void omap2_enter_full_retention(void)
/* Block console output in case it is on one of the OMAP UARTs */
if (!is_suspending())
if (try_acquire_console_sem())
if (!console_trylock())
goto no_sleep;
omap_uart_prepare_idle(0);
@ -151,7 +151,7 @@ static void omap2_enter_full_retention(void)
omap_uart_resume_idle(0);
if (!is_suspending())
release_console_sem();
console_unlock();
no_sleep:
if (omap2_pm_debug) {

4
arch/arm/mach-omap2/pm34xx.c
View File

@ -398,7 +398,7 @@ void omap_sram_idle(void)
if (!is_suspending())
if (per_next_state < PWRDM_POWER_ON ||
core_next_state < PWRDM_POWER_ON)
if (try_acquire_console_sem())
if (!console_trylock())
goto console_still_active;
/* PER */
@ -481,7 +481,7 @@ void omap_sram_idle(void)
}
if (!is_suspending())
release_console_sem();
console_unlock();
console_still_active:
/* Disable IO-PAD and IO-CHAIN wakeup */

4
arch/arm/mach-omap2/serial.c
View File

@ -812,7 +812,7 @@ void __init omap_serial_init_port(struct omap_board_data *bdata)
oh->dev_attr = uart;
acquire_console_sem(); /* in case the earlycon is on the UART */
console_lock(); /* in case the earlycon is on the UART */
/*
* Because of early UART probing, UART did not get idled
@ -838,7 +838,7 @@ void __init omap_serial_init_port(struct omap_board_data *bdata)
omap_uart_block_sleep(uart);
uart->timeout = DEFAULT_TIMEOUT;
release_console_sem();
console_unlock();
if ((cpu_is_omap34xx() && uart->padconf) ||
(uart->wk_en && uart->wk_mask)) {

4
arch/parisc/kernel/pdc_cons.c
View File

@ -169,11 +169,11 @@ static int __init pdc_console_tty_driver_init(void)
struct console *tmp;
acquire_console_sem();
console_lock();
for_each_console(tmp)
if (tmp == &pdc_cons)
break;
release_console_sem();
console_unlock();
if (!tmp) {
printk(KERN_INFO "PDC console driver not registered anymore, not creating %s\n", pdc_cons.name);

8
drivers/char/bfin_jtag_comm.c
View File

@ -183,16 +183,16 @@ bfin_jc_circ_write(const unsigned char *buf, int count)
}
#ifndef CONFIG_BFIN_JTAG_COMM_CONSOLE
# define acquire_console_sem()
# define release_console_sem()
# define console_lock()
# define console_unlock()
#endif
static int
bfin_jc_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
int i;
acquire_console_sem();
console_lock();
i = bfin_jc_circ_write(buf, count);
release_console_sem();
console_unlock();
wake_up_process(bfin_jc_kthread);
return i;
}

8
drivers/gpu/drm/nouveau/nouveau_drv.c
View File

@ -234,9 +234,9 @@ nouveau_pci_suspend(struct pci_dev *pdev, pm_message_t pm_state)
pci_set_power_state(pdev, PCI_D3hot);
}
acquire_console_sem();
console_lock();
nouveau_fbcon_set_suspend(dev, 1);
release_console_sem();
console_unlock();
nouveau_fbcon_restore_accel(dev);
return 0;
@ -359,9 +359,9 @@ nouveau_pci_resume(struct pci_dev *pdev)
nv_crtc->lut.depth = 0;
}
acquire_console_sem();
console_lock();
nouveau_fbcon_set_suspend(dev, 0);
release_console_sem();
console_unlock();
nouveau_fbcon_zfill_all(dev);

10
drivers/gpu/drm/radeon/radeon_device.c
View File

@ -891,9 +891,9 @@ int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
pci_disable_device(dev->pdev);
pci_set_power_state(dev->pdev, PCI_D3hot);
}
acquire_console_sem();
console_lock();
radeon_fbdev_set_suspend(rdev, 1);
release_console_sem();
console_unlock();
return 0;
}
@ -905,11 +905,11 @@ int radeon_resume_kms(struct drm_device *dev)
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
acquire_console_sem();
console_lock();
pci_set_power_state(dev->pdev, PCI_D0);
pci_restore_state(dev->pdev);
if (pci_enable_device(dev->pdev)) {
release_console_sem();
console_unlock();
return -1;
}
pci_set_master(dev->pdev);
@ -920,7 +920,7 @@ int radeon_resume_kms(struct drm_device *dev)
radeon_restore_bios_scratch_regs(rdev);
radeon_fbdev_set_suspend(rdev, 0);
release_console_sem();
console_unlock();
/* reset hpd state */
radeon_hpd_init(rdev);

8
drivers/staging/msm/msm_fb.c
View File

@ -347,7 +347,7 @@ static int msm_fb_suspend(struct platform_device *pdev, pm_message_t state)
if ((!mfd) || (mfd->key != MFD_KEY))
return 0;
acquire_console_sem();
console_lock();
fb_set_suspend(mfd->fbi, 1);
ret = msm_fb_suspend_sub(mfd);
@ -358,7 +358,7 @@ static int msm_fb_suspend(struct platform_device *pdev, pm_message_t state)
pdev->dev.power.power_state = state;
}
release_console_sem();
console_unlock();
return ret;
}
#else
@ -431,11 +431,11 @@ static int msm_fb_resume(struct platform_device *pdev)
if ((!mfd) || (mfd->key != MFD_KEY))
return 0;
acquire_console_sem();
console_lock();
ret = msm_fb_resume_sub(mfd);
pdev->dev.power.power_state = PMSG_ON;
fb_set_suspend(mfd->fbi, 1);
release_console_sem();
console_unlock();
return ret;
}

10
drivers/staging/olpc_dcon/olpc_dcon.c
View File

@ -373,17 +373,17 @@ static void dcon_source_switch(struct work_struct *work)
*
* For now, we just hope..
*/
acquire_console_sem();
console_lock();
ignore_fb_events = 1;
if (fb_blank(fbinfo, FB_BLANK_UNBLANK)) {
ignore_fb_events = 0;
release_console_sem();
console_unlock();
printk(KERN_ERR "olpc-dcon: Failed to enter CPU mode\n");
dcon_pending = DCON_SOURCE_DCON;
return;
}
ignore_fb_events = 0;
release_console_sem();
console_unlock();
/* And turn off the DCON */
pdata->set_dconload(1);
@ -435,12 +435,12 @@ static void dcon_source_switch(struct work_struct *work)
}
}
acquire_console_sem();
console_lock();
ignore_fb_events = 1;
if (fb_blank(fbinfo, FB_BLANK_POWERDOWN))
printk(KERN_ERR "olpc-dcon: couldn't blank fb!\n");
ignore_fb_events = 0;
release_console_sem();
console_unlock();
printk(KERN_INFO "olpc-dcon: The DCON has control\n");
break;

8
drivers/staging/sm7xx/smtcfb.c
View File

@ -1044,9 +1044,9 @@ static int __maybe_unused smtcfb_suspend(struct pci_dev *pdev, pm_message_t msg)
/* when doing suspend, call fb apis and pci apis */
if (msg.event == PM_EVENT_SUSPEND) {
acquire_console_sem();
console_lock();
fb_set_suspend(&sfb->fb, 1);
release_console_sem();
console_unlock();
retv = pci_save_state(pdev);
pci_disable_device(pdev);
retv = pci_choose_state(pdev, msg);
@ -1105,9 +1105,9 @@ static int __maybe_unused smtcfb_resume(struct pci_dev *pdev)
smtcfb_setmode(sfb);
acquire_console_sem();
console_lock();
fb_set_suspend(&sfb->fb, 0);
release_console_sem();
console_unlock();
return 0;
}

2
drivers/tty/serial/sb1250-duart.c
View File

@ -829,7 +829,7 @@ static void __init sbd_probe_duarts(void)
#ifdef CONFIG_SERIAL_SB1250_DUART_CONSOLE
/*
* Serial console stuff. Very basic, polling driver for doing serial
* console output. The console_sem is held by the caller, so we
* console output. The console_lock is held by the caller, so we
* shouldn't be interrupted for more console activity.
*/
static void sbd_console_putchar(struct uart_port *uport, int ch)

4
drivers/tty/tty_io.c
View File

@ -3256,7 +3256,7 @@ static ssize_t show_cons_active(struct device *dev,
struct console *c;
ssize_t count = 0;
acquire_console_sem();
console_lock();
for (c = console_drivers; c; c = c->next) {
if (!c->device)
continue;
@ -3271,7 +3271,7 @@ static ssize_t show_cons_active(struct device *dev,
while (i--)
count += sprintf(buf + count, "%s%d%c",
cs[i]->name, cs[i]->index, i ? ' ':'\n');
release_console_sem();
console_unlock();
return count;
}

4
drivers/tty/vt/selection.c
View File

@ -316,9 +316,9 @@ int paste_selection(struct tty_struct *tty)
/* always called with BTM from vt_ioctl */
WARN_ON(!tty_locked());
acquire_console_sem();
console_lock();
poke_blanked_console();
release_console_sem();
console_unlock();
ld = tty_ldisc_ref(tty);
if (!ld) {

16
drivers/tty/vt/vc_screen.c
View File

@ -202,7 +202,7 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
/* Select the proper current console and verify
* sanity of the situation under the console lock.
*/
acquire_console_sem();
console_lock();
attr = (currcons & 128);
currcons = (currcons & 127);
@ -336,9 +336,9 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
* the pagefault handling code may want to call printk().
*/
release_console_sem();
console_unlock();
ret = copy_to_user(buf, con_buf_start, orig_count);
acquire_console_sem();
console_lock();
if (ret) {
read += (orig_count - ret);
@ -354,7 +354,7 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
if (read)
ret = read;
unlock_out:
release_console_sem();
console_unlock();
mutex_unlock(&con_buf_mtx);
return ret;
}
@ -379,7 +379,7 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
/* Select the proper current console and verify
* sanity of the situation under the console lock.
*/
acquire_console_sem();
console_lock();
attr = (currcons & 128);
currcons = (currcons & 127);
@ -414,9 +414,9 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
/* Temporarily drop the console lock so that we can read
* in the write data from userspace safely.
*/
release_console_sem();
console_unlock();
ret = copy_from_user(con_buf, buf, this_round);
acquire_console_sem();
console_lock();
if (ret) {
this_round -= ret;
@ -542,7 +542,7 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
vcs_scr_updated(vc);
unlock_out:
release_console_sem();
console_unlock();
mutex_unlock(&con_buf_mtx);

124
drivers/tty/vt/vt.c
View File

@ -1003,9 +1003,9 @@ static int vt_resize(struct tty_struct *tty, struct winsize *ws)
struct vc_data *vc = tty->driver_data;
int ret;
acquire_console_sem();
console_lock();
ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
release_console_sem();
console_unlock();
return ret;
}
@ -1271,7 +1271,7 @@ static void default_attr(struct vc_data *vc)
vc->vc_color = vc->vc_def_color;
}
/* console_sem is held */
/* console_lock is held */
static void csi_m(struct vc_data *vc)
{
int i;
@ -1415,7 +1415,7 @@ int mouse_reporting(void)
return vc_cons[fg_console].d->vc_report_mouse;
}
/* console_sem is held */
/* console_lock is held */
static void set_mode(struct vc_data *vc, int on_off)
{
int i;
@ -1485,7 +1485,7 @@ static void set_mode(struct vc_data *vc, int on_off)
}
}
/* console_sem is held */
/* console_lock is held */
static void setterm_command(struct vc_data *vc)
{
switch(vc->vc_par[0]) {
@ -1545,7 +1545,7 @@ static void setterm_command(struct vc_data *vc)
}
}
/* console_sem is held */
/* console_lock is held */
static void csi_at(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_cols - vc->vc_x)
@ -1555,7 +1555,7 @@ static void csi_at(struct vc_data *vc, unsigned int nr)
insert_char(vc, nr);
}
/* console_sem is held */
/* console_lock is held */
static void csi_L(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_rows - vc->vc_y)
@ -1566,7 +1566,7 @@ static void csi_L(struct vc_data *vc, unsigned int nr)
vc->vc_need_wrap = 0;
}
/* console_sem is held */
/* console_lock is held */
static void csi_P(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_cols - vc->vc_x)
@ -1576,7 +1576,7 @@ static void csi_P(struct vc_data *vc, unsigned int nr)
delete_char(vc, nr);
}
/* console_sem is held */
/* console_lock is held */
static void csi_M(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_rows - vc->vc_y)
@ -1587,7 +1587,7 @@ static void csi_M(struct vc_data *vc, unsigned int nr)
vc->vc_need_wrap = 0;
}
/* console_sem is held (except via vc_init->reset_terminal */
/* console_lock is held (except via vc_init->reset_terminal */
static void save_cur(struct vc_data *vc)
{
vc->vc_saved_x = vc->vc_x;
@ -1603,7 +1603,7 @@ static void save_cur(struct vc_data *vc)
vc->vc_saved_G1 = vc->vc_G1_charset;
}
/* console_sem is held */
/* console_lock is held */
static void restore_cur(struct vc_data *vc)
{
gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
@ -1625,7 +1625,7 @@ enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
ESpalette };
/* console_sem is held (except via vc_init()) */
/* console_lock is held (except via vc_init()) */
static void reset_terminal(struct vc_data *vc, int do_clear)
{
vc->vc_top = 0;
@ -1685,7 +1685,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
csi_J(vc, 2);
}
/* console_sem is held */
/* console_lock is held */
static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
{
/*
@ -2119,7 +2119,7 @@ static int is_double_width(uint32_t ucs)
return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
}
/* acquires console_sem */
/* acquires console_lock */
static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
#ifdef VT_BUF_VRAM_ONLY
@ -2147,11 +2147,11 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
might_sleep();
acquire_console_sem();
console_lock();
vc = tty->driver_data;
if (vc == NULL) {
printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
release_console_sem();
console_unlock();
return 0;
}
@ -2159,7 +2159,7 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
if (!vc_cons_allocated(currcons)) {
/* could this happen? */
printk_once("con_write: tty %d not allocated\n", currcons+1);
release_console_sem();
console_unlock();
return 0;
}
@ -2375,7 +2375,7 @@ rescan_last_byte:
}
FLUSH
console_conditional_schedule();
release_console_sem();
console_unlock();
notify_update(vc);
return n;
#undef FLUSH
@ -2388,11 +2388,11 @@ rescan_last_byte:
* us to do the switches asynchronously (needed when we want
* to switch due to a keyboard interrupt). Synchronization
* with other console code and prevention of re-entrancy is
* ensured with console_sem.
* ensured with console_lock.
*/
static void console_callback(struct work_struct *ignored)
{
acquire_console_sem();
console_lock();
if (want_console >= 0) {
if (want_console != fg_console &&
@ -2422,7 +2422,7 @@ static void console_callback(struct work_struct *ignored)
}
notify_update(vc_cons[fg_console].d);
release_console_sem();
console_unlock();
}
int set_console(int nr)
@ -2603,7 +2603,7 @@ static struct console vt_console_driver = {
*/
/*
* Generally a bit racy with respect to console_sem().
* Generally a bit racy with respect to console_lock();.
*
* There are some functions which don't need it.
*
@ -2629,17 +2629,17 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
switch (type)
{
case TIOCL_SETSEL:
acquire_console_sem();
console_lock();
ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
release_console_sem();
console_unlock();
break;
case TIOCL_PASTESEL:
ret = paste_selection(tty);
break;
case TIOCL_UNBLANKSCREEN:
acquire_console_sem();
console_lock();
unblank_screen();
release_console_sem();
console_unlock();
break;
case TIOCL_SELLOADLUT:
ret = sel_loadlut(p);
@ -2688,10 +2688,10 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
}
break;
case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
acquire_console_sem();
console_lock();
ignore_poke = 1;
do_blank_screen(0);
release_console_sem();
console_unlock();
break;
case TIOCL_BLANKEDSCREEN:
ret = console_blanked;
@ -2790,11 +2790,11 @@ static void con_flush_chars(struct tty_struct *tty)
return;
/* if we race with con_close(), vt may be null */
acquire_console_sem();
console_lock();
vc = tty->driver_data;
if (vc)
set_cursor(vc);
release_console_sem();
console_unlock();
}
/*
@ -2805,7 +2805,7 @@ static int con_open(struct tty_struct *tty, struct file *filp)
unsigned int currcons = tty->index;
int ret = 0;
acquire_console_sem();
console_lock();
if (tty->driver_data == NULL) {
ret = vc_allocate(currcons);
if (ret == 0) {
@ -2813,7 +2813,7 @@ static int con_open(struct tty_struct *tty, struct file *filp)
/* Still being freed */
if (vc->port.tty) {
release_console_sem();
console_unlock();
return -ERESTARTSYS;
}
tty->driver_data = vc;
@ -2827,11 +2827,11 @@ static int con_open(struct tty_struct *tty, struct file *filp)
tty->termios->c_iflag |= IUTF8;
else
tty->termios->c_iflag &= ~IUTF8;
release_console_sem();
console_unlock();
return ret;
}
}
release_console_sem();
console_unlock();
return ret;
}
@ -2844,9 +2844,9 @@ static void con_shutdown(struct tty_struct *tty)
{
struct vc_data *vc = tty->driver_data;
BUG_ON(vc == NULL);
acquire_console_sem();
console_lock();
vc->port.tty = NULL;
release_console_sem();
console_unlock();
tty_shutdown(tty);
}
@ -2893,13 +2893,13 @@ static int __init con_init(void)
struct vc_data *vc;
unsigned int currcons = 0, i;
acquire_console_sem();
console_lock();
if (conswitchp)
display_desc = conswitchp->con_startup();
if (!display_desc) {
fg_console = 0;
release_console_sem();
console_unlock();
return 0;
}
@ -2946,7 +2946,7 @@ static int __init con_init(void)
printable = 1;
printk("\n");
release_console_sem();
console_unlock();
#ifdef CONFIG_VT_CONSOLE
register_console(&vt_console_driver);
@ -3037,7 +3037,7 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
if (!try_module_get(owner))
return -ENODEV;
acquire_console_sem();
console_lock();
/* check if driver is registered */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@ -3122,7 +3122,7 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
retval = 0;
err:
release_console_sem();
console_unlock();
module_put(owner);
return retval;
};
@ -3171,7 +3171,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
if (!try_module_get(owner))
return -ENODEV;
acquire_console_sem();
console_lock();
/* check if driver is registered and if it is unbindable */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@ -3185,7 +3185,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
}
if (retval) {
release_console_sem();
console_unlock();
goto err;
}
@ -3204,12 +3204,12 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
}
if (retval) {
release_console_sem();
console_unlock();
goto err;
}
if (!con_is_bound(csw)) {
release_console_sem();
console_unlock();
goto err;
}
@ -3238,7 +3238,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
if (!con_is_bound(csw))
con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
release_console_sem();
console_unlock();
/* ignore return value, binding should not fail */
bind_con_driver(defcsw, first, last, deflt);
err:
@ -3538,7 +3538,7 @@ int register_con_driver(const struct consw *csw, int first, int last)
if (!try_module_get(owner))
return -ENODEV;
acquire_console_sem();
console_lock();
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
con_driver = &registered_con_driver[i];
@ -3592,7 +3592,7 @@ int register_con_driver(const struct consw *csw, int first, int last)
}
err:
release_console_sem();
console_unlock();
module_put(owner);
return retval;
}
@ -3613,7 +3613,7 @@ int unregister_con_driver(const struct consw *csw)
{
int i, retval = -ENODEV;
acquire_console_sem();
console_lock();
/* cannot unregister a bound driver */
if (con_is_bound(csw))
@ -3639,7 +3639,7 @@ int unregister_con_driver(const struct consw *csw)
}
}
err:
release_console_sem();
console_unlock();
return retval;
}
EXPORT_SYMBOL(unregister_con_driver);
@ -3934,9 +3934,9 @@ int con_set_cmap(unsigned char __user *arg)
{
int rc;
acquire_console_sem();
console_lock();
rc = set_get_cmap (arg,1);
release_console_sem();
console_unlock();
return rc;
}
@ -3945,9 +3945,9 @@ int con_get_cmap(unsigned char __user *arg)
{
int rc;
acquire_console_sem();
console_lock();
rc = set_get_cmap (arg,0);
release_console_sem();
console_unlock();
return rc;
}
@ -3994,12 +3994,12 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
} else
font.data = NULL;
acquire_console_sem();
console_lock();
if (vc->vc_sw->con_font_get)
rc = vc->vc_sw->con_font_get(vc, &font);
else
rc = -ENOSYS;
release_console_sem();
console_unlock();
if (rc)
goto out;
@ -4076,12 +4076,12 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
font.data = memdup_user(op->data, size);
if (IS_ERR(font.data))
return PTR_ERR(font.data);
acquire_console_sem();
console_lock();
if (vc->vc_sw->con_font_set)
rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
else
rc = -ENOSYS;
release_console_sem();
console_unlock();
kfree(font.data);
return rc;
}
@ -4103,12 +4103,12 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op)
else
name[MAX_FONT_NAME - 1] = 0;
acquire_console_sem();
console_lock();
if (vc->vc_sw->con_font_default)
rc = vc->vc_sw->con_font_default(vc, &font, s);
else
rc = -ENOSYS;
release_console_sem();
console_unlock();
if (!rc) {
op->width = font.width;
op->height = font.height;
@ -4124,7 +4124,7 @@ static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
if (vc->vc_mode != KD_TEXT)
return -EINVAL;
acquire_console_sem();
console_lock();
if (!vc->vc_sw->con_font_copy)
rc = -ENOSYS;
else if (con < 0 || !vc_cons_allocated(con))
@ -4133,7 +4133,7 @@ static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
rc = 0;
else
rc = vc->vc_sw->con_font_copy(vc, con);
release_console_sem();
console_unlock();
return rc;
}

60
drivers/tty/vt/vt_ioctl.c
View File

@ -649,12 +649,12 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
/*
* explicitly blank/unblank the screen if switching modes
*/
acquire_console_sem();
console_lock();
if (arg == KD_TEXT)
do_unblank_screen(1);
else
do_blank_screen(1);
release_console_sem();
console_unlock();
break;
case KDGETMODE:
@ -893,7 +893,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
ret = -EINVAL;
goto out;
}
acquire_console_sem();
console_lock();
vc->vt_mode = tmp;
/* the frsig is ignored, so we set it to 0 */
vc->vt_mode.frsig = 0;
@ -901,7 +901,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
vc->vt_pid = get_pid(task_pid(current));
/* no switch is required -- saw@shade.msu.ru */
vc->vt_newvt = -1;
release_console_sem();
console_unlock();
break;
}
@ -910,9 +910,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
struct vt_mode tmp;
int rc;
acquire_console_sem();
console_lock();
memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode));
release_console_sem();
console_unlock();
rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));
if (rc)
@ -965,9 +965,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
ret = -ENXIO;
else {
arg--;
acquire_console_sem();
console_lock();
ret = vc_allocate(arg);
release_console_sem();
console_unlock();
if (ret)
break;
set_console(arg);
@ -990,7 +990,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
ret = -ENXIO;
else {
vsa.console--;
acquire_console_sem();
console_lock();
ret = vc_allocate(vsa.console);
if (ret == 0) {
struct vc_data *nvc;
@ -1003,7 +1003,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
put_pid(nvc->vt_pid);
nvc->vt_pid = get_pid(task_pid(current));
}
release_console_sem();
console_unlock();
if (ret)
break;
/* Commence switch and lock */
@ -1044,7 +1044,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
/*
* Switching-from response
*/
acquire_console_sem();
console_lock();
if (vc->vt_newvt >= 0) {
if (arg == 0)
/*
@ -1063,7 +1063,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
vc->vt_newvt = -1;
ret = vc_allocate(newvt);
if (ret) {
release_console_sem();
console_unlock();
break;
}
/*
@ -1083,7 +1083,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
if (arg != VT_ACKACQ)
ret = -EINVAL;
}
release_console_sem();
console_unlock();
break;
/*
@ -1096,20 +1096,20 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
}
if (arg == 0) {
/* deallocate all unused consoles, but leave 0 */
acquire_console_sem();
console_lock();
for (i=1; i<MAX_NR_CONSOLES; i++)
if (! VT_BUSY(i))
vc_deallocate(i);
release_console_sem();
console_unlock();
} else {
/* deallocate a single console, if possible */
arg--;
if (VT_BUSY(arg))
ret = -EBUSY;
else if (arg) { /* leave 0 */
acquire_console_sem();
console_lock();
vc_deallocate(arg);
release_console_sem();
console_unlock();
}
}
break;
@ -1126,7 +1126,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
get_user(cc, &vtsizes->v_cols))
ret = -EFAULT;
else {
acquire_console_sem();
console_lock();
for (i = 0; i < MAX_NR_CONSOLES; i++) {
vc = vc_cons[i].d;
@ -1135,7 +1135,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
vc_resize(vc_cons[i].d, cc, ll);
}
}
release_console_sem();
console_unlock();
}
break;
}
@ -1187,14 +1187,14 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (!vc_cons[i].d)
continue;
acquire_console_sem();
console_lock();
if (vlin)
vc_cons[i].d->vc_scan_lines = vlin;
if (clin)
vc_cons[i].d->vc_font.height = clin;
vc_cons[i].d->vc_resize_user = 1;
vc_resize(vc_cons[i].d, cc, ll);
release_console_sem();
console_unlock();
}
break;
}
@ -1367,7 +1367,7 @@ void vc_SAK(struct work_struct *work)
struct vc_data *vc;
struct tty_struct *tty;
acquire_console_sem();
console_lock();
vc = vc_con->d;
if (vc) {
tty = vc->port.tty;
@ -1379,7 +1379,7 @@ void vc_SAK(struct work_struct *work)
__do_SAK(tty);
reset_vc(vc);
}
release_console_sem();
console_unlock();
}
#ifdef CONFIG_COMPAT
@ -1737,10 +1737,10 @@ int vt_move_to_console(unsigned int vt, int alloc)
{
int prev;
acquire_console_sem();
console_lock();
/* Graphics mode - up to X */
if (disable_vt_switch) {
release_console_sem();
console_unlock();
return 0;
}
prev = fg_console;
@ -1748,7 +1748,7 @@ int vt_move_to_console(unsigned int vt, int alloc)
if (alloc && vc_allocate(vt)) {
/* we can't have a free VC for now. Too bad,
* we don't want to mess the screen for now. */
release_console_sem();
console_unlock();
return -ENOSPC;
}
@ -1758,10 +1758,10 @@ int vt_move_to_console(unsigned int vt, int alloc)
* Let the calling function know so it can decide
* what to do.
*/
release_console_sem();
console_unlock();
return -EIO;
}
release_console_sem();
console_unlock();
tty_lock();
if (vt_waitactive(vt + 1)) {
pr_debug("Suspend: Can't switch VCs.");
@ -1781,8 +1781,8 @@ int vt_move_to_console(unsigned int vt, int alloc)
*/
void pm_set_vt_switch(int do_switch)
{
acquire_console_sem();
console_lock();
disable_vt_switch = !do_switch;
release_console_sem();
console_unlock();
}
EXPORT_SYMBOL(pm_set_vt_switch);

12
drivers/video/arkfb.c
View File

@ -23,7 +23,7 @@
#include <linux/svga.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
#include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
#include <video/vga.h>
#ifdef CONFIG_MTRR
@ -1091,12 +1091,12 @@ static int ark_pci_suspend (struct pci_dev* dev, pm_message_t state)
dev_info(info->device, "suspend\n");
acquire_console_sem();
console_lock();
mutex_lock(&(par->open_lock));
if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
@ -1107,7 +1107,7 @@ static int ark_pci_suspend (struct pci_dev* dev, pm_message_t state)
pci_set_power_state(dev, pci_choose_state(dev, state));
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
@ -1122,7 +1122,7 @@ static int ark_pci_resume (struct pci_dev* dev)
dev_info(info->device, "resume\n");
acquire_console_sem();
console_lock();
mutex_lock(&(par->open_lock));
if (par->ref_count == 0)
@ -1141,7 +1141,7 @@ static int ark_pci_resume (struct pci_dev* dev)
fail:
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
#else

12
drivers/video/aty/aty128fb.c
View File

@ -1860,11 +1860,11 @@ static void aty128_early_resume(void *data)
{
struct aty128fb_par *par = data;
if (try_acquire_console_sem())
if (!console_trylock())
return;
pci_restore_state(par->pdev);
aty128_do_resume(par->pdev);
release_console_sem();
console_unlock();
}
#endif /* CONFIG_PPC_PMAC */
@ -2438,7 +2438,7 @@ static int aty128_pci_suspend(struct pci_dev *pdev, pm_message_t state)
printk(KERN_DEBUG "aty128fb: suspending...\n");
acquire_console_sem();
console_lock();
fb_set_suspend(info, 1);
@ -2470,7 +2470,7 @@ static int aty128_pci_suspend(struct pci_dev *pdev, pm_message_t state)
if (state.event != PM_EVENT_ON)
aty128_set_suspend(par, 1);
release_console_sem();
console_unlock();
pdev->dev.power.power_state = state;
@ -2527,9 +2527,9 @@ static int aty128_pci_resume(struct pci_dev *pdev)
{
int rc;
acquire_console_sem();
console_lock();
rc = aty128_do_resume(pdev);
release_console_sem();
console_unlock();
return rc;
}

10
drivers/video/aty/atyfb_base.c
View File

@ -2069,7 +2069,7 @@ static int atyfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
if (state.event == pdev->dev.power.power_state.event)
return 0;
acquire_console_sem();
console_lock();
fb_set_suspend(info, 1);
@ -2097,14 +2097,14 @@ static int atyfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
par->lock_blank = 0;
atyfb_blank(FB_BLANK_UNBLANK, info);
fb_set_suspend(info, 0);
release_console_sem();
console_unlock();
return -EIO;
}
#else
pci_set_power_state(pdev, pci_choose_state(pdev, state));
#endif
release_console_sem();
console_unlock();
pdev->dev.power.power_state = state;
@ -2133,7 +2133,7 @@ static int atyfb_pci_resume(struct pci_dev *pdev)
if (pdev->dev.power.power_state.event == PM_EVENT_ON)
return 0;
acquire_console_sem();
console_lock();
/*
* PCI state will have been restored by the core, so
@ -2161,7 +2161,7 @@ static int atyfb_pci_resume(struct pci_dev *pdev)
par->lock_blank = 0;
atyfb_blank(FB_BLANK_UNBLANK, info);
release_console_sem();
console_unlock();
pdev->dev.power.power_state = PMSG_ON;

10
drivers/video/aty/radeon_pm.c
View File

@ -2626,7 +2626,7 @@ int radeonfb_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
goto done;
}
acquire_console_sem();
console_lock();
fb_set_suspend(info, 1);
@ -2690,7 +2690,7 @@ int radeonfb_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
if (rinfo->pm_mode & radeon_pm_d2)
radeon_set_suspend(rinfo, 1);
release_console_sem();
console_unlock();
done:
pdev->dev.power.power_state = mesg;
@ -2715,10 +2715,10 @@ int radeonfb_pci_resume(struct pci_dev *pdev)
return 0;
if (rinfo->no_schedule) {
if (try_acquire_console_sem())
if (!console_trylock())
return 0;
} else
acquire_console_sem();
console_lock();
printk(KERN_DEBUG "radeonfb (%s): resuming from state: %d...\n",
pci_name(pdev), pdev->dev.power.power_state.event);
@ -2783,7 +2783,7 @@ int radeonfb_pci_resume(struct pci_dev *pdev)
pdev->dev.power.power_state = PMSG_ON;
bail:
release_console_sem();
console_unlock();
return rc;
}

8
drivers/video/chipsfb.c
View File

@ -460,10 +460,10 @@ static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
if (!(state.event & PM_EVENT_SLEEP))
goto done;
acquire_console_sem();
console_lock();
chipsfb_blank(1, p);
fb_set_suspend(p, 1);
release_console_sem();
console_unlock();
done:
pdev->dev.power.power_state = state;
return 0;
@ -473,10 +473,10 @@ static int chipsfb_pci_resume(struct pci_dev *pdev)
{
struct fb_info *p = pci_get_drvdata(pdev);
acquire_console_sem();
console_lock();
fb_set_suspend(p, 0);
chipsfb_blank(0, p);
release_console_sem();
console_unlock();
pdev->dev.power.power_state = PMSG_ON;
return 0;

42
drivers/video/console/fbcon.c
View File

@ -375,14 +375,14 @@ static void fb_flashcursor(struct work_struct *work)
int c;
int mode;
acquire_console_sem();
console_lock();
if (ops && ops->currcon != -1)
vc = vc_cons[ops->currcon].d;
if (!vc || !CON_IS_VISIBLE(vc) ||
registered_fb[con2fb_map[vc->vc_num]] != info ||
vc->vc_deccm != 1) {
release_console_sem();
console_unlock();
return;
}
@ -392,7 +392,7 @@ static void fb_flashcursor(struct work_struct *work)
CM_ERASE : CM_DRAW;
ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
get_color(vc, info, c, 0));
release_console_sem();
console_unlock();
}
static void cursor_timer_handler(unsigned long dev_addr)
@ -836,7 +836,7 @@ static int set_con2fb_map(int unit, int newidx, int user)
found = search_fb_in_map(newidx);
acquire_console_sem();
console_lock();
con2fb_map[unit] = newidx;
if (!err && !found)
err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
@ -863,7 +863,7 @@ static int set_con2fb_map(int unit, int newidx, int user)
if (!search_fb_in_map(info_idx))
info_idx = newidx;
release_console_sem();
console_unlock();
return err;
}
@ -3321,7 +3321,7 @@ static ssize_t store_rotate(struct device *device,
if (fbcon_has_exited)
return count;
acquire_console_sem();
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
@ -3331,7 +3331,7 @@ static ssize_t store_rotate(struct device *device,
rotate = simple_strtoul(buf, last, 0);
fbcon_rotate(info, rotate);
err:
release_console_sem();
console_unlock();
return count;
}
@ -3346,7 +3346,7 @@ static ssize_t store_rotate_all(struct device *device,
if (fbcon_has_exited)
return count;
acquire_console_sem();
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
@ -3356,7 +3356,7 @@ static ssize_t store_rotate_all(struct device *device,
rotate = simple_strtoul(buf, last, 0);
fbcon_rotate_all(info, rotate);
err:
release_console_sem();
console_unlock();
return count;
}
@ -3369,7 +3369,7 @@ static ssize_t show_rotate(struct device *device,
if (fbcon_has_exited)
return 0;
acquire_console_sem();
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
@ -3378,7 +3378,7 @@ static ssize_t show_rotate(struct device *device,
info = registered_fb[idx];
rotate = fbcon_get_rotate(info);
err:
release_console_sem();
console_unlock();
return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
}
@ -3392,7 +3392,7 @@ static ssize_t show_cursor_blink(struct device *device,
if (fbcon_has_exited)
return 0;
acquire_console_sem();
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
@ -3406,7 +3406,7 @@ static ssize_t show_cursor_blink(struct device *device,
blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
err:
release_console_sem();
console_unlock();
return snprintf(buf, PAGE_SIZE, "%d\n", blink);
}
@ -3421,7 +3421,7 @@ static ssize_t store_cursor_blink(struct device *device,
if (fbcon_has_exited)
return count;
acquire_console_sem();
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
@ -3443,7 +3443,7 @@ static ssize_t store_cursor_blink(struct device *device,
}
err:
release_console_sem();
console_unlock();
return count;
}
@ -3482,7 +3482,7 @@ static void fbcon_start(void)
if (num_registered_fb) {
int i;
acquire_console_sem();
console_lock();
for (i = 0; i < FB_MAX; i++) {
if (registered_fb[i] != NULL) {
@ -3491,7 +3491,7 @@ static void fbcon_start(void)
}
}
release_console_sem();
console_unlock();
fbcon_takeover(0);
}
}
@ -3552,7 +3552,7 @@ static int __init fb_console_init(void)
{
int i;
acquire_console_sem();
console_lock();
fb_register_client(&fbcon_event_notifier);
fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
"fbcon");
@ -3568,7 +3568,7 @@ static int __init fb_console_init(void)
for (i = 0; i < MAX_NR_CONSOLES; i++)
con2fb_map[i] = -1;
release_console_sem();
console_unlock();
fbcon_start();
return 0;
}
@ -3591,12 +3591,12 @@ static void __exit fbcon_deinit_device(void)
static void __exit fb_console_exit(void)
{
acquire_console_sem();
console_lock();
fb_unregister_client(&fbcon_event_notifier);
fbcon_deinit_device();
device_destroy(fb_class, MKDEV(0, 0));
fbcon_exit();
release_console_sem();
console_unlock();
unregister_con_driver(&fb_con);
}

8
drivers/video/da8xx-fb.c
View File

@ -1131,14 +1131,14 @@ static int fb_suspend(struct platform_device *dev, pm_message_t state)
struct fb_info *info = platform_get_drvdata(dev);
struct da8xx_fb_par *par = info->par;
acquire_console_sem();
console_lock();
if (par->panel_power_ctrl)
par->panel_power_ctrl(0);
fb_set_suspend(info, 1);
lcd_disable_raster();
clk_disable(par->lcdc_clk);
release_console_sem();
console_unlock();
return 0;
}
@ -1147,14 +1147,14 @@ static int fb_resume(struct platform_device *dev)
struct fb_info *info = platform_get_drvdata(dev);
struct da8xx_fb_par *par = info->par;
acquire_console_sem();
console_lock();
if (par->panel_power_ctrl)
par->panel_power_ctrl(1);
clk_enable(par->lcdc_clk);
lcd_enable_raster();
fb_set_suspend(info, 0);
release_console_sem();
console_unlock();
return 0;
}

12
drivers/video/fbmem.c
View File

@ -1036,11 +1036,11 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
return -EFAULT;
if (!lock_fb_info(info))
return -ENODEV;
acquire_console_sem();
console_lock();
info->flags |= FBINFO_MISC_USEREVENT;
ret = fb_set_var(info, &var);
info->flags &= ~FBINFO_MISC_USEREVENT;
release_console_sem();
console_unlock();
unlock_fb_info(info);
if (!ret && copy_to_user(argp, &var, sizeof(var)))
ret = -EFAULT;
@ -1072,9 +1072,9 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
return -EFAULT;
if (!lock_fb_info(info))
return -ENODEV;
acquire_console_sem();
console_lock();
ret = fb_pan_display(info, &var);
release_console_sem();
console_unlock();
unlock_fb_info(info);
if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
return -EFAULT;
@ -1119,11 +1119,11 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
case FBIOBLANK:
if (!lock_fb_info(info))
return -ENODEV;
acquire_console_sem();
console_lock();
info->flags |= FBINFO_MISC_USEREVENT;
ret = fb_blank(info, arg);
info->flags &= ~FBINFO_MISC_USEREVENT;
release_console_sem();
console_unlock();
unlock_fb_info(info);
break;
default:

20
drivers/video/fbsysfs.c
View File

@ -90,11 +90,11 @@ static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var)
int err;
var->activate |= FB_ACTIVATE_FORCE;
acquire_console_sem();
console_lock();
fb_info->flags |= FBINFO_MISC_USEREVENT;
err = fb_set_var(fb_info, var);
fb_info->flags &= ~FBINFO_MISC_USEREVENT;
release_console_sem();
console_unlock();
if (err)
return err;
return 0;
@ -175,7 +175,7 @@ static ssize_t store_modes(struct device *device,
if (i * sizeof(struct fb_videomode) != count)
return -EINVAL;
acquire_console_sem();
console_lock();
list_splice(&fb_info->modelist, &old_list);
fb_videomode_to_modelist((const struct fb_videomode *)buf, i,
&fb_info->modelist);
@ -185,7 +185,7 @@ static ssize_t store_modes(struct device *device,
} else
fb_destroy_modelist(&old_list);
release_console_sem();
console_unlock();
return 0;
}
@ -301,11 +301,11 @@ static ssize_t store_blank(struct device *device,
char *last = NULL;
int err;
acquire_console_sem();
console_lock();
fb_info->flags |= FBINFO_MISC_USEREVENT;
err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
fb_info->flags &= ~FBINFO_MISC_USEREVENT;
release_console_sem();
console_unlock();
if (err < 0)
return err;
return count;
@ -364,9 +364,9 @@ static ssize_t store_pan(struct device *device,
return -EINVAL;
var.yoffset = simple_strtoul(last, &last, 0);
acquire_console_sem();
console_lock();
err = fb_pan_display(fb_info, &var);
release_console_sem();
console_unlock();
if (err < 0)
return err;
@ -399,9 +399,9 @@ static ssize_t store_fbstate(struct device *device,
state = simple_strtoul(buf, &last, 0);
acquire_console_sem();
console_lock();
fb_set_suspend(fb_info, (int)state);
release_console_sem();
console_unlock();
return count;
}

8
drivers/video/geode/gxfb_core.c
View File

@ -344,10 +344,10 @@ static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state)
struct fb_info *info = pci_get_drvdata(pdev);
if (state.event == PM_EVENT_SUSPEND) {
acquire_console_sem();
console_lock();
gx_powerdown(info);
fb_set_suspend(info, 1);
release_console_sem();
console_unlock();
}
/* there's no point in setting PCI states; we emulate PCI, so
@ -361,7 +361,7 @@ static int gxfb_resume(struct pci_dev *pdev)
struct fb_info *info = pci_get_drvdata(pdev);
int ret;
acquire_console_sem();
console_lock();
ret = gx_powerup(info);
if (ret) {
printk(KERN_ERR "gxfb: power up failed!\n");
@ -369,7 +369,7 @@ static int gxfb_resume(struct pci_dev *pdev)
}
fb_set_suspend(info, 0);
release_console_sem();
console_unlock();
return 0;
}
#endif

8
drivers/video/geode/lxfb_core.c
View File

@ -465,10 +465,10 @@ static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state)
struct fb_info *info = pci_get_drvdata(pdev);
if (state.event == PM_EVENT_SUSPEND) {
acquire_console_sem();
console_lock();
lx_powerdown(info);
fb_set_suspend(info, 1);
release_console_sem();
console_unlock();
}
/* there's no point in setting PCI states; we emulate PCI, so
@ -482,7 +482,7 @@ static int lxfb_resume(struct pci_dev *pdev)
struct fb_info *info = pci_get_drvdata(pdev);
int ret;
acquire_console_sem();
console_lock();
ret = lx_powerup(info);
if (ret) {
printk(KERN_ERR "lxfb: power up failed!\n");
@ -490,7 +490,7 @@ static int lxfb_resume(struct pci_dev *pdev)
}
fb_set_suspend(info, 0);
release_console_sem();
console_unlock();
return 0;
}
#else

8
drivers/video/i810/i810_main.c
View File

@ -1574,7 +1574,7 @@ static int i810fb_suspend(struct pci_dev *dev, pm_message_t mesg)
return 0;
}
acquire_console_sem();
console_lock();
fb_set_suspend(info, 1);
if (info->fbops->fb_sync)
@ -1587,7 +1587,7 @@ static int i810fb_suspend(struct pci_dev *dev, pm_message_t mesg)
pci_save_state(dev);
pci_disable_device(dev);
pci_set_power_state(dev, pci_choose_state(dev, mesg));
release_console_sem();
console_unlock();
return 0;
}
@ -1605,7 +1605,7 @@ static int i810fb_resume(struct pci_dev *dev)
return 0;
}
acquire_console_sem();
console_lock();
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
@ -1621,7 +1621,7 @@ static int i810fb_resume(struct pci_dev *dev)
fb_set_suspend (info, 0);
info->fbops->fb_blank(VESA_NO_BLANKING, info);
fail:
release_console_sem();
console_unlock();
return 0;
}
/***********************************************************************

8
drivers/video/jz4740_fb.c
View File

@ -778,9 +778,9 @@ static int jzfb_suspend(struct device *dev)
{
struct jzfb *jzfb = dev_get_drvdata(dev);
acquire_console_sem();
console_lock();
fb_set_suspend(jzfb->fb, 1);
release_console_sem();
console_unlock();
mutex_lock(&jzfb->lock);
if (jzfb->is_enabled)
@ -800,9 +800,9 @@ static int jzfb_resume(struct device *dev)
jzfb_enable(jzfb);
mutex_unlock(&jzfb->lock);
acquire_console_sem();
console_lock();
fb_set_suspend(jzfb->fb, 0);
release_console_sem();
console_unlock();
return 0;
}

8
drivers/video/mx3fb.c
View File

@ -1177,9 +1177,9 @@ static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state)
struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
acquire_console_sem();
console_lock();
fb_set_suspend(mx3fb->fbi, 1);
release_console_sem();
console_unlock();
if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
sdc_disable_channel(mx3_fbi);
@ -1202,9 +1202,9 @@ static int mx3fb_resume(struct platform_device *pdev)
sdc_set_brightness(mx3fb, mx3fb->backlight_level);
}
acquire_console_sem();
console_lock();
fb_set_suspend(mx3fb->fbi, 0);
release_console_sem();
console_unlock();
return 0;
}

8
drivers/video/nvidia/nvidia.c
View File

@ -1057,7 +1057,7 @@ static int nvidiafb_suspend(struct pci_dev *dev, pm_message_t mesg)
if (mesg.event == PM_EVENT_PRETHAW)
mesg.event = PM_EVENT_FREEZE;
acquire_console_sem();
console_lock();
par->pm_state = mesg.event;
if (mesg.event & PM_EVENT_SLEEP) {
@ -1070,7 +1070,7 @@ static int nvidiafb_suspend(struct pci_dev *dev, pm_message_t mesg)
}
dev->dev.power.power_state = mesg;
release_console_sem();
console_unlock();
return 0;
}
@ -1079,7 +1079,7 @@ static int nvidiafb_resume(struct pci_dev *dev)
struct fb_info *info = pci_get_drvdata(dev);
struct nvidia_par *par = info->par;
acquire_console_sem();
console_lock();
pci_set_power_state(dev, PCI_D0);
if (par->pm_state != PM_EVENT_FREEZE) {
@ -1097,7 +1097,7 @@ static int nvidiafb_resume(struct pci_dev *dev)
nvidiafb_blank(FB_BLANK_UNBLANK, info);
fail:
release_console_sem();
console_unlock();
return 0;
}
#else

16
drivers/video/ps3fb.c
View File

@ -513,9 +513,9 @@ static int ps3fb_release(struct fb_info *info, int user)
if (atomic_dec_and_test(&ps3fb.f_count)) {
if (atomic_read(&ps3fb.ext_flip)) {
atomic_set(&ps3fb.ext_flip, 0);
if (!try_acquire_console_sem()) {
if (console_trylock()) {
ps3fb_sync(info, 0); /* single buffer */
release_console_sem();
console_unlock();
}
}
}
@ -830,14 +830,14 @@ static int ps3fb_ioctl(struct fb_info *info, unsigned int cmd,
if (vmode) {
var = info->var;
fb_videomode_to_var(&var, vmode);
acquire_console_sem();
console_lock();
info->flags |= FBINFO_MISC_USEREVENT;
/* Force, in case only special bits changed */
var.activate |= FB_ACTIVATE_FORCE;
par->new_mode_id = val;
retval = fb_set_var(info, &var);
info->flags &= ~FBINFO_MISC_USEREVENT;
release_console_sem();
console_unlock();
}
break;
}
@ -881,9 +881,9 @@ static int ps3fb_ioctl(struct fb_info *info, unsigned int cmd,
break;
dev_dbg(info->device, "PS3FB_IOCTL_FSEL:%d\n", val);
acquire_console_sem();
console_lock();
retval = ps3fb_sync(info, val);
release_console_sem();
console_unlock();
break;
default:
@ -903,9 +903,9 @@ static int ps3fbd(void *arg)
set_current_state(TASK_INTERRUPTIBLE);
if (ps3fb.is_kicked) {
ps3fb.is_kicked = 0;
acquire_console_sem();
console_lock();
ps3fb_sync(info, 0); /* single buffer */
release_console_sem();
console_unlock();
}
schedule();
}

16
drivers/video/s3fb.c
View File

@ -22,7 +22,7 @@
#include <linux/svga.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
#include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
#include <video/vga.h>
#ifdef CONFIG_MTRR
@ -1113,12 +1113,12 @@ static int s3_pci_suspend(struct pci_dev* dev, pm_message_t state)
dev_info(info->device, "suspend\n");
acquire_console_sem();
console_lock();
mutex_lock(&(par->open_lock));
if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
@ -1129,7 +1129,7 @@ static int s3_pci_suspend(struct pci_dev* dev, pm_message_t state)
pci_set_power_state(dev, pci_choose_state(dev, state));
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
@ -1145,12 +1145,12 @@ static int s3_pci_resume(struct pci_dev* dev)
dev_info(info->device, "resume\n");
acquire_console_sem();
console_lock();
mutex_lock(&(par->open_lock));
if (par->ref_count == 0) {
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
@ -1159,7 +1159,7 @@ static int s3_pci_resume(struct pci_dev* dev)
err = pci_enable_device(dev);
if (err) {
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
dev_err(info->device, "error %d enabling device for resume\n", err);
return err;
}
@ -1169,7 +1169,7 @@ static int s3_pci_resume(struct pci_dev* dev)
fb_set_suspend(info, 0);
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}

8
drivers/video/savage/savagefb_driver.c
View File

@ -2373,7 +2373,7 @@ static int savagefb_suspend(struct pci_dev *dev, pm_message_t mesg)
if (mesg.event == PM_EVENT_FREEZE)
return 0;
acquire_console_sem();
console_lock();
fb_set_suspend(info, 1);
if (info->fbops->fb_sync)
@ -2385,7 +2385,7 @@ static int savagefb_suspend(struct pci_dev *dev, pm_message_t mesg)
pci_save_state(dev);
pci_disable_device(dev);
pci_set_power_state(dev, pci_choose_state(dev, mesg));
release_console_sem();
console_unlock();
return 0;
}
@ -2409,7 +2409,7 @@ static int savagefb_resume(struct pci_dev* dev)
return 0;
}
acquire_console_sem();
console_lock();
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
@ -2423,7 +2423,7 @@ static int savagefb_resume(struct pci_dev* dev)
savagefb_set_par(info);
fb_set_suspend(info, 0);
savagefb_blank(FB_BLANK_UNBLANK, info);
release_console_sem();
console_unlock();
return 0;
}

8
drivers/video/sh_mobile_hdmi.c
View File

@ -1151,7 +1151,7 @@ static void sh_hdmi_edid_work_fn(struct work_struct *work)
ch = info->par;
acquire_console_sem();
console_lock();
/* HDMI plug in */
if (!sh_hdmi_must_reconfigure(hdmi) &&
@ -1171,7 +1171,7 @@ static void sh_hdmi_edid_work_fn(struct work_struct *work)
fb_set_suspend(info, 0);
}
release_console_sem();
console_unlock();
} else {
ret = 0;
if (!hdmi->info)
@ -1181,12 +1181,12 @@ static void sh_hdmi_edid_work_fn(struct work_struct *work)
fb_destroy_modedb(hdmi->monspec.modedb);
hdmi->monspec.modedb = NULL;
acquire_console_sem();
console_lock();
/* HDMI disconnect */
fb_set_suspend(hdmi->info, 1);
release_console_sem();
console_unlock();
pm_runtime_put(hdmi->dev);
}

4
drivers/video/sh_mobile_lcdcfb.c
View File

@ -912,9 +912,9 @@ static int sh_mobile_release(struct fb_info *info, int user)
/* Nothing to reconfigure, when called from fbcon */
if (user) {
acquire_console_sem();
console_lock();
sh_mobile_fb_reconfig(info);
release_console_sem();
console_unlock();
}
mutex_unlock(&ch->open_lock);

8
drivers/video/sm501fb.c
View File

@ -2010,9 +2010,9 @@ static int sm501fb_suspend_fb(struct sm501fb_info *info,
/* tell console/fb driver we are suspending */
acquire_console_sem();
console_lock();
fb_set_suspend(fbi, 1);
release_console_sem();
console_unlock();
/* backup copies in case chip is powered down over suspend */
@ -2069,9 +2069,9 @@ static void sm501fb_resume_fb(struct sm501fb_info *info,
memcpy_toio(par->cursor.k_addr, par->store_cursor,
par->cursor.size);
acquire_console_sem();
console_lock();
fb_set_suspend(fbi, 0);
release_console_sem();
console_unlock();
vfree(par->store_fb);
vfree(par->store_cursor);

10
drivers/video/tmiofb.c
View File

@ -25,7 +25,7 @@
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
/* Why should fb driver call console functions? because acquire_console_sem() */
/* Why should fb driver call console functions? because console_lock() */
#include <linux/console.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
@ -944,7 +944,7 @@ static int tmiofb_suspend(struct platform_device *dev, pm_message_t state)
struct mfd_cell *cell = dev->dev.platform_data;
int retval = 0;
acquire_console_sem();
console_lock();
fb_set_suspend(info, 1);
@ -965,7 +965,7 @@ static int tmiofb_suspend(struct platform_device *dev, pm_message_t state)
if (cell->suspend)
retval = cell->suspend(dev);
release_console_sem();
console_unlock();
return retval;
}
@ -976,7 +976,7 @@ static int tmiofb_resume(struct platform_device *dev)
struct mfd_cell *cell = dev->dev.platform_data;
int retval = 0;
acquire_console_sem();
console_lock();
if (cell->resume) {
retval = cell->resume(dev);
@ -992,7 +992,7 @@ static int tmiofb_resume(struct platform_device *dev)
fb_set_suspend(info, 0);
out:
release_console_sem();
console_unlock();
return retval;
}
#else

8
drivers/video/via/viafbdev.c
View File

@ -1674,17 +1674,17 @@ static int parse_mode(const char *str, u32 *xres, u32 *yres)
#ifdef CONFIG_PM
static int viafb_suspend(void *unused)
{
acquire_console_sem();
console_lock();
fb_set_suspend(viafbinfo, 1);
viafb_sync(viafbinfo);
release_console_sem();
console_unlock();
return 0;
}
static int viafb_resume(void *unused)
{
acquire_console_sem();
console_lock();
if (viaparinfo->shared->vdev->engine_mmio)
viafb_reset_engine(viaparinfo);
viafb_set_par(viafbinfo);
@ -1692,7 +1692,7 @@ static int viafb_resume(void *unused)
viafb_set_par(viafbinfo1);
fb_set_suspend(viafbinfo, 0);
release_console_sem();
console_unlock();
return 0;
}

12
drivers/video/vt8623fb.c
View File

@ -23,7 +23,7 @@
#include <linux/svga.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
#include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
#include <video/vga.h>
#ifdef CONFIG_MTRR
@ -819,12 +819,12 @@ static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
dev_info(info->device, "suspend\n");
acquire_console_sem();
console_lock();
mutex_lock(&(par->open_lock));
if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
@ -835,7 +835,7 @@ static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
pci_set_power_state(dev, pci_choose_state(dev, state));
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}
@ -850,7 +850,7 @@ static int vt8623_pci_resume(struct pci_dev* dev)
dev_info(info->device, "resume\n");
acquire_console_sem();
console_lock();
mutex_lock(&(par->open_lock));
if (par->ref_count == 0)
@ -869,7 +869,7 @@ static int vt8623_pci_resume(struct pci_dev* dev)
fail:
mutex_unlock(&(par->open_lock));
release_console_sem();
console_unlock();
return 0;
}

4
drivers/video/xen-fbfront.c
View File

@ -491,12 +491,12 @@ xenfb_make_preferred_console(void)
if (console_set_on_cmdline)
return;
acquire_console_sem();
console_lock();
for_each_console(c) {
if (!strcmp(c->name, "tty") && c->index == 0)
break;
}
release_console_sem();
console_unlock();
if (c) {
unregister_console(c);
c->flags |= CON_CONSDEV;

4
fs/proc/consoles.c
View File

@ -67,7 +67,7 @@ static void *c_start(struct seq_file *m, loff_t *pos)
struct console *con;
loff_t off = 0;
acquire_console_sem();
console_lock();
for_each_console(con)
if (off++ == *pos)
break;
@ -84,7 +84,7 @@ static void *c_next(struct seq_file *m, void *v, loff_t *pos)
static void c_stop(struct seq_file *m, void *v)
{
release_console_sem();
console_unlock();
}
static const struct seq_operations consoles_op = {

6
include/linux/console.h
View File

@ -139,9 +139,9 @@ extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_n
extern void register_console(struct console *);
extern int unregister_console(struct console *);
extern struct console *console_drivers;
extern void acquire_console_sem(void);
extern int try_acquire_console_sem(void);
extern void release_console_sem(void);
extern void console_lock(void);
extern int console_trylock(void);
extern void console_unlock(void);
extern void console_conditional_schedule(void);
extern void console_unblank(void);
extern struct tty_driver *console_device(int *);

100
kernel/printk.c
View File

@ -97,7 +97,7 @@ static int console_locked, console_suspended;
/*
* logbuf_lock protects log_buf, log_start, log_end, con_start and logged_chars
* It is also used in interesting ways to provide interlocking in
* release_console_sem().
* console_unlock();.
*/
static DEFINE_SPINLOCK(logbuf_lock);
@ -501,7 +501,7 @@ static void _call_console_drivers(unsigned start,
/*
* Call the console drivers, asking them to write out
* log_buf[start] to log_buf[end - 1].
* The console_sem must be held.
* The console_lock must be held.
*/
static void call_console_drivers(unsigned start, unsigned end)
{
@ -604,11 +604,11 @@ static int have_callable_console(void)
*
* This is printk(). It can be called from any context. We want it to work.
*
* We try to grab the console_sem. If we succeed, it's easy - we log the output and
* We try to grab the console_lock. If we succeed, it's easy - we log the output and
* call the console drivers. If we fail to get the semaphore we place the output
* into the log buffer and return. The current holder of the console_sem will
* notice the new output in release_console_sem() and will send it to the
* consoles before releasing the semaphore.
* notice the new output in console_unlock(); and will send it to the
* consoles before releasing the lock.
*
* One effect of this deferred printing is that code which calls printk() and
* then changes console_loglevel may break. This is because console_loglevel
@ -659,19 +659,19 @@ static inline int can_use_console(unsigned int cpu)
/*
* Try to get console ownership to actually show the kernel
* messages from a 'printk'. Return true (and with the
* console_semaphore held, and 'console_locked' set) if it
* console_lock held, and 'console_locked' set) if it
* is successful, false otherwise.
*
* This gets called with the 'logbuf_lock' spinlock held and
* interrupts disabled. It should return with 'lockbuf_lock'
* released but interrupts still disabled.
*/
static int acquire_console_semaphore_for_printk(unsigned int cpu)
static int console_trylock_for_printk(unsigned int cpu)
__releases(&logbuf_lock)
{
int retval = 0;
if (!try_acquire_console_sem()) {
if (console_trylock()) {
retval = 1;
/*
@ -827,12 +827,12 @@ asmlinkage int vprintk(const char *fmt, va_list args)
* actual magic (print out buffers, wake up klogd,
* etc).
*
* The acquire_console_semaphore_for_printk() function
* The console_trylock_for_printk() function
* will release 'logbuf_lock' regardless of whether it
* actually gets the semaphore or not.
*/
if (acquire_console_semaphore_for_printk(this_cpu))
release_console_sem();
if (console_trylock_for_printk(this_cpu))
console_unlock();
lockdep_on();
out_restore_irqs:
@ -993,7 +993,7 @@ void suspend_console(void)
if (!console_suspend_enabled)
return;
printk("Suspending console(s) (use no_console_suspend to debug)\n");
acquire_console_sem();
console_lock();
console_suspended = 1;
up(&console_sem);
}
@ -1004,7 +1004,7 @@ void resume_console(void)
return;
down(&console_sem);
console_suspended = 0;
release_console_sem();
console_unlock();
}
/**
@ -1027,21 +1027,21 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self,
case CPU_DYING:
case CPU_DOWN_FAILED:
case CPU_UP_CANCELED:
acquire_console_sem();
release_console_sem();
console_lock();
console_unlock();
}
return NOTIFY_OK;
}
/**
* acquire_console_sem - lock the console system for exclusive use.
* console_lock - lock the console system for exclusive use.
*
* Acquires a semaphore which guarantees that the caller has
* Acquires a lock which guarantees that the caller has
* exclusive access to the console system and the console_drivers list.
*
* Can sleep, returns nothing.
*/
void acquire_console_sem(void)
void console_lock(void)
{
BUG_ON(in_interrupt());
down(&console_sem);
@ -1050,21 +1050,29 @@ void acquire_console_sem(void)
console_locked = 1;
console_may_schedule = 1;
}
EXPORT_SYMBOL(acquire_console_sem);
EXPORT_SYMBOL(console_lock);
int try_acquire_console_sem(void)
/**
* console_trylock - try to lock the console system for exclusive use.
*
* Tried to acquire a lock which guarantees that the caller has
* exclusive access to the console system and the console_drivers list.
*
* returns 1 on success, and 0 on failure to acquire the lock.
*/
int console_trylock(void)
{
if (down_trylock(&console_sem))
return -1;
return 0;
if (console_suspended) {
up(&console_sem);
return -1;
return 0;
}
console_locked = 1;
console_may_schedule = 0;
return 0;
return 1;
}
EXPORT_SYMBOL(try_acquire_console_sem);
EXPORT_SYMBOL(console_trylock);
int is_console_locked(void)
{
@ -1095,20 +1103,20 @@ void wake_up_klogd(void)
}
/**
* release_console_sem - unlock the console system
* console_unlock - unlock the console system
*
* Releases the semaphore which the caller holds on the console system
* Releases the console_lock which the caller holds on the console system
* and the console driver list.
*
* While the semaphore was held, console output may have been buffered
* by printk(). If this is the case, release_console_sem() emits
* the output prior to releasing the semaphore.
* While the console_lock was held, console output may have been buffered
* by printk(). If this is the case, console_unlock(); emits
* the output prior to releasing the lock.
*
* If there is output waiting for klogd, we wake it up.
*
* release_console_sem() may be called from any context.
* console_unlock(); may be called from any context.
*/
void release_console_sem(void)
void console_unlock(void)
{
unsigned long flags;
unsigned _con_start, _log_end;
@ -1141,7 +1149,7 @@ void release_console_sem(void)
if (wake_klogd)
wake_up_klogd();
}
EXPORT_SYMBOL(release_console_sem);
EXPORT_SYMBOL(console_unlock);
/**
* console_conditional_schedule - yield the CPU if required
@ -1150,7 +1158,7 @@ EXPORT_SYMBOL(release_console_sem);
* if this CPU should yield the CPU to another task, do
* so here.
*
* Must be called within acquire_console_sem().
* Must be called within console_lock();.
*/
void __sched console_conditional_schedule(void)
{
@ -1171,14 +1179,14 @@ void console_unblank(void)
if (down_trylock(&console_sem) != 0)
return;
} else
acquire_console_sem();
console_lock();
console_locked = 1;
console_may_schedule = 0;
for_each_console(c)
if ((c->flags & CON_ENABLED) && c->unblank)
c->unblank();
release_console_sem();
console_unlock();
}
/*
@ -1189,7 +1197,7 @@ struct tty_driver *console_device(int *index)
struct console *c;
struct tty_driver *driver = NULL;
acquire_console_sem();
console_lock();
for_each_console(c) {
if (!c->device)
continue;
@ -1197,7 +1205,7 @@ struct tty_driver *console_device(int *index)
if (driver)
break;
}
release_console_sem();
console_unlock();
return driver;
}
@ -1208,17 +1216,17 @@ struct tty_driver *console_device(int *index)
*/
void console_stop(struct console *console)
{
acquire_console_sem();
console_lock();
console->flags &= ~CON_ENABLED;
release_console_sem();
console_unlock();
}
EXPORT_SYMBOL(console_stop);
void console_start(struct console *console)
{
acquire_console_sem();
console_lock();
console->flags |= CON_ENABLED;
release_console_sem();
console_unlock();
}
EXPORT_SYMBOL(console_start);
@ -1340,7 +1348,7 @@ void register_console(struct console *newcon)
* Put this console in the list - keep the
* preferred driver at the head of the list.
*/
acquire_console_sem();
console_lock();
if ((newcon->flags & CON_CONSDEV) || console_drivers == NULL) {
newcon->next = console_drivers;
console_drivers = newcon;
@ -1352,14 +1360,14 @@ void register_console(struct console *newcon)
}
if (newcon->flags & CON_PRINTBUFFER) {
/*
* release_console_sem() will print out the buffered messages
* console_unlock(); will print out the buffered messages
* for us.
*/
spin_lock_irqsave(&logbuf_lock, flags);
con_start = log_start;
spin_unlock_irqrestore(&logbuf_lock, flags);
}
release_console_sem();
console_unlock();
console_sysfs_notify();
/*
@ -1396,7 +1404,7 @@ int unregister_console(struct console *console)
return braille_unregister_console(console);
#endif
acquire_console_sem();
console_lock();
if (console_drivers == console) {
console_drivers=console->next;
res = 0;
@ -1418,7 +1426,7 @@ int unregister_console(struct console *console)
if (console_drivers != NULL && console->flags & CON_CONSDEV)
console_drivers->flags |= CON_CONSDEV;
release_console_sem();
console_unlock();
console_sysfs_notify();
return res;
}