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[PATCH] Consolidate bust_spinlocks()

Browse Source 
Part of long forgotten patch
http://groups.google.com/group/fa.linux.kernel/msg/e98e941ce1cf29f6?dmode=source
Since then, m32r grabbed two copies.

Leave s390 copy because of important absence of CONFIG_VT, but remove
references to non-existent timerlist_lock.  ia64 also loses timerlist_lock.

Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill Korotaev 2007-02-10 01:46:18 -08:00 committed by Linus Torvalds
parent c530cba649
commit cefc8be824
8 changed files with 5 additions and 135 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
arch/i386/mm/fault.c
View File

@ -59,32 +59,6 @@ static inline int notify_page_fault(enum die_val val, const char *str,
return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);
}
/*
* Unlock any spinlocks which will prevent us from getting the
* message out
*/
void bust_spinlocks(int yes)
{
int loglevel_save = console_loglevel;
if (yes) {
oops_in_progress = 1;
return;
}
#ifdef CONFIG_VT
unblank_screen();
#endif
oops_in_progress = 0;
/*
* OK, the message is on the console. Now we call printk()
* without oops_in_progress set so that printk will give klogd
* a poke. Hold onto your hats...
*/
console_loglevel = 15; /* NMI oopser may have shut the console up */
printk(" ");
console_loglevel = loglevel_save;
}
/*
* Return EIP plus the CS segment base. The segment limit is also
* adjusted, clamped to the kernel/user address space (whichever is

30
arch/ia64/kernel/traps.c
View File

@ -24,8 +24,6 @@
#include <asm/uaccess.h>
#include <asm/kdebug.h>
extern spinlock_t timerlist_lock;
fpswa_interface_t *fpswa_interface;
EXPORT_SYMBOL(fpswa_interface);
@ -53,34 +51,6 @@ trap_init (void)
fpswa_interface = __va(ia64_boot_param->fpswa);
}
/*
* Unlock any spinlocks which will prevent us from getting the message out (timerlist_lock
* is acquired through the console unblank code)
*/
void
bust_spinlocks (int yes)
{
int loglevel_save = console_loglevel;
if (yes) {
oops_in_progress = 1;
return;
}
#ifdef CONFIG_VT
unblank_screen();
#endif
oops_in_progress = 0;
/*
* OK, the message is on the console. Now we call printk() without
* oops_in_progress set so that printk will give klogd a poke. Hold onto
* your hats...
*/
console_loglevel = 15; /* NMI oopser may have shut the console up */
printk(" ");
console_loglevel = loglevel_save;
}
void
die (const char *str, struct pt_regs *regs, long err)
{

26
arch/m32r/mm/fault-nommu.c
View File

@ -44,32 +44,6 @@ unsigned int tlb_entry_d_dat[NR_CPUS];
#define tlb_entry_d tlb_entry_d_dat[smp_processor_id()]
#endif
/*
* Unlock any spinlocks which will prevent us from getting the
* message out
*/
void bust_spinlocks(int yes)
{
int loglevel_save = console_loglevel;
if (yes) {
oops_in_progress = 1;
return;
}
#ifdef CONFIG_VT
unblank_screen();
#endif
oops_in_progress = 0;
/*
* OK, the message is on the console. Now we call printk()
* without oops_in_progress set so that printk will give klogd
* a poke. Hold onto your hats...
*/
console_loglevel = 15; /* NMI oopser may have shut the console up */
printk(" ");
console_loglevel = loglevel_save;
}
void do_BUG(const char *file, int line)
{
bust_spinlocks(1);

26
arch/m32r/mm/fault.c
View File

@ -49,32 +49,6 @@ unsigned int tlb_entry_d_dat[NR_CPUS];
extern void init_tlb(void);
/*
* Unlock any spinlocks which will prevent us from getting the
* message out
*/
void bust_spinlocks(int yes)
{
int loglevel_save = console_loglevel;
if (yes) {
oops_in_progress = 1;
return;
}
#ifdef CONFIG_VT
unblank_screen();
#endif
oops_in_progress = 0;
/*
* OK, the message is on the console. Now we call printk()
* without oops_in_progress set so that printk will give klogd
* a poke. Hold onto your hats...
*/
console_loglevel = 15; /* NMI oopser may have shut the console up */
printk(" ");
console_loglevel = loglevel_save;
}
/*======================================================================*
* do_page_fault()
*======================================================================*

4
arch/s390/mm/fault.c
View File

@ -83,12 +83,10 @@ static inline int notify_page_fault(enum die_val val, const char *str,
}
#endif
extern spinlock_t timerlist_lock;
/*
* Unlock any spinlocks which will prevent us from getting the
* message out (timerlist_lock is acquired through the
* console unblank code)
* message out.
*/
void bust_spinlocks(int yes)
{

21
arch/x86_64/mm/fault.c
View File

@ -69,27 +69,6 @@ static inline int notify_page_fault(enum die_val val, const char *str,
return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);
}
void bust_spinlocks(int yes)
{
int loglevel_save = console_loglevel;
if (yes) {
oops_in_progress = 1;
} else {
#ifdef CONFIG_VT
unblank_screen();
#endif
oops_in_progress = 0;
/*
* OK, the message is on the console. Now we call printk()
* without oops_in_progress set so that printk will give klogd
* a poke. Hold onto your hats...
*/
console_loglevel = 15; /* NMI oopser may have shut the console up */
printk(" ");
console_loglevel = loglevel_save;
}
}
/* Sometimes the CPU reports invalid exceptions on prefetch.
Check that here and ignore.
Opcode checker based on code by Richard Brunner */

5
lib/Makefile
View File

@ -3,7 +3,7 @@
#
lib-y := ctype.o string.o vsprintf.o cmdline.o \
bust_spinlocks.o rbtree.o radix-tree.o dump_stack.o \
rbtree.o radix-tree.o dump_stack.o \
idr.o div64.o int_sqrt.o bitmap.o extable.o prio_tree.o \
sha1.o irq_regs.o reciprocal_div.o
@ -12,7 +12,8 @@ lib-$(CONFIG_SMP) += cpumask.o
lib-y += kobject.o kref.o kobject_uevent.o klist.o
obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o iomap.o
obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o iomap.o \
bust_spinlocks.o
ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG

2
lib/bust_spinlocks.c
View File

@ -14,7 +14,7 @@
#include <linux/vt_kern.h>
void bust_spinlocks(int yes)
void __attribute__((weak)) bust_spinlocks(int yes)
{
if (yes) {
oops_in_progress = 1;