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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

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Pull sparc fixes from David Miller:

 1) Do serial locking in a way that makes things clear that these are
    IRQ spinlocks.

 2) Conversion to generic idle loop broke first generation Niagara
    machines, need to have %pil interrupts enabled during cpu yield
    hypervisor call.

 3) Do not use magic constants for iterations over tsb tables, from Doug
    Wilson.

 4) Fix erroneous truncation of 64-bit system call return values to
    32-bit.  From Dave Kleikamp.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Make sure %pil interrupts are enabled during hypervisor yield.
  sparc64:tsb.c:use array size macro rather than number
  sparc64: don't treat 64-bit syscall return codes as 32-bit
  sparc: serial: Clean up the locking for -rt
This commit is contained in:
Linus Torvalds 2014-03-24 17:30:44 -07:00
commit 56f1f4b24e
7 changed files with 31 additions and 43 deletions
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4
arch/sparc/kernel/process_64.c
View File

@ -58,9 +58,12 @@ void arch_cpu_idle(void)
{
if (tlb_type != hypervisor) {
touch_nmi_watchdog();
local_irq_enable();
} else {
unsigned long pstate;
local_irq_enable();
/* The sun4v sleeping code requires that we have PSTATE.IE cleared over
* the cpu sleep hypervisor call.
*/
@ -82,7 +85,6 @@ void arch_cpu_idle(void)
: "=&r" (pstate)
: "i" (PSTATE_IE));
}
local_irq_enable();
}
#ifdef CONFIG_HOTPLUG_CPU

4
arch/sparc/kernel/syscalls.S
View File

@ -189,7 +189,8 @@ linux_sparc_syscall32:
mov %i0, %l5 ! IEU1
5: call %l7 ! CTI Group brk forced
srl %i5, 0, %o5 ! IEU1
ba,a,pt %xcc, 3f
ba,pt %xcc, 3f
sra %o0, 0, %o0
/* Linux native system calls enter here... */
.align 32
@ -217,7 +218,6 @@ linux_sparc_syscall:
3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
ret_sys_call:
ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
sra %o0, 0, %o0
mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
sllx %g2, 32, %g2

2
arch/sparc/mm/tsb.c
View File

@ -273,7 +273,7 @@ void __init pgtable_cache_init(void)
prom_halt();
}
for (i = 0; i < 8; i++) {
for (i = 0; i < ARRAY_SIZE(tsb_cache_names); i++) {
unsigned long size = 8192 << i;
const char *name = tsb_cache_names[i];

22
drivers/tty/serial/sunhv.c
View File

@ -433,13 +433,10 @@ static void sunhv_console_write_paged(struct console *con, const char *s, unsign
unsigned long flags;
int locked = 1;
local_irq_save(flags);
if (port->sysrq) {
locked = 0;
} else if (oops_in_progress) {
locked = spin_trylock(&port->lock);
} else
spin_lock(&port->lock);
if (port->sysrq || oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
while (n > 0) {
unsigned long ra = __pa(con_write_page);
@ -470,8 +467,7 @@ static void sunhv_console_write_paged(struct console *con, const char *s, unsign
}
if (locked)
spin_unlock(&port->lock);
local_irq_restore(flags);
spin_unlock_irqrestore(&port->lock, flags);
}
static inline void sunhv_console_putchar(struct uart_port *port, char c)
@ -492,7 +488,10 @@ static void sunhv_console_write_bychar(struct console *con, const char *s, unsig
unsigned long flags;
int i, locked = 1;
local_irq_save(flags);
if (port->sysrq || oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
if (port->sysrq) {
locked = 0;
} else if (oops_in_progress) {
@ -507,8 +506,7 @@ static void sunhv_console_write_bychar(struct console *con, const char *s, unsig
}
if (locked)
spin_unlock(&port->lock);
local_irq_restore(flags);
spin_unlock_irqrestore(&port->lock, flags);
}
static struct console sunhv_console = {

14
drivers/tty/serial/sunsab.c
View File

@ -844,20 +844,16 @@ static void sunsab_console_write(struct console *con, const char *s, unsigned n)
unsigned long flags;
int locked = 1;
local_irq_save(flags);
if (up->port.sysrq) {
locked = 0;
} else if (oops_in_progress) {
locked = spin_trylock(&up->port.lock);
} else
spin_lock(&up->port.lock);
if (up->port.sysrq || oops_in_progress)
locked = spin_trylock_irqsave(&up->port.lock, flags);
else
spin_lock_irqsave(&up->port.lock, flags);
uart_console_write(&up->port, s, n, sunsab_console_putchar);
sunsab_tec_wait(up);
if (locked)
spin_unlock(&up->port.lock);
local_irq_restore(flags);
spin_unlock_irqrestore(&up->port.lock, flags);
}
static int sunsab_console_setup(struct console *con, char *options)

14
drivers/tty/serial/sunsu.c
View File

@ -1295,13 +1295,10 @@ static void sunsu_console_write(struct console *co, const char *s,
unsigned int ier;
int locked = 1;
local_irq_save(flags);
if (up->port.sysrq) {
locked = 0;
} else if (oops_in_progress) {
locked = spin_trylock(&up->port.lock);
} else
spin_lock(&up->port.lock);
if (up->port.sysrq || oops_in_progress)
locked = spin_trylock_irqsave(&up->port.lock, flags);
else
spin_lock_irqsave(&up->port.lock, flags);
/*
* First save the UER then disable the interrupts
@ -1319,8 +1316,7 @@ static void sunsu_console_write(struct console *co, const char *s,
serial_out(up, UART_IER, ier);
if (locked)
spin_unlock(&up->port.lock);
local_irq_restore(flags);
spin_unlock_irqrestore(&up->port.lock, flags);
}
/*

14
drivers/tty/serial/sunzilog.c
View File

@ -1195,20 +1195,16 @@ sunzilog_console_write(struct console *con, const char *s, unsigned int count)
unsigned long flags;
int locked = 1;
local_irq_save(flags);
if (up->port.sysrq) {
locked = 0;
} else if (oops_in_progress) {
locked = spin_trylock(&up->port.lock);
} else
spin_lock(&up->port.lock);
if (up->port.sysrq || oops_in_progress)
locked = spin_trylock_irqsave(&up->port.lock, flags);
else
spin_lock_irqsave(&up->port.lock, flags);
uart_console_write(&up->port, s, count, sunzilog_putchar);
udelay(2);
if (locked)
spin_unlock(&up->port.lock);
local_irq_restore(flags);
spin_unlock_irqrestore(&up->port.lock, flags);
}
static int __init sunzilog_console_setup(struct console *con, char *options)