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authorAndi Kleen <ak@suse.de>2007-10-19 20:35:03 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-19 20:35:03 +0200
commit39743c9ef717fd4f2b5583f010115c5f2482b8ae (patch)
tree960daf67c159ddbce5323342db1fced74524bf74 /arch/x86/kernel/traps_32.c
parentb1992df3f070475b243b12ca1241a5938ef5f9bc (diff)
x86: use raw locks during oopses
Don't want any lockdep or other fragile machinery to run during oopses. Use raw spinlocks directly for oops locking. Also disables irq flag tracing there. [ tglx: arch/x86 adaptation ] Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/traps_32.c')
-rw-r--r--arch/x86/kernel/traps_32.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 746fad2c504..3f02e0f42e6 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -350,11 +350,11 @@ int is_valid_bugaddr(unsigned long eip)
void die(const char * str, struct pt_regs * regs, long err)
{
static struct {
- spinlock_t lock;
+ raw_spinlock_t lock;
u32 lock_owner;
int lock_owner_depth;
} die = {
- .lock = __SPIN_LOCK_UNLOCKED(die.lock),
+ .lock = __RAW_SPIN_LOCK_UNLOCKED,
.lock_owner = -1,
.lock_owner_depth = 0
};
@@ -365,13 +365,14 @@ void die(const char * str, struct pt_regs * regs, long err)
if (die.lock_owner != raw_smp_processor_id()) {
console_verbose();
- spin_lock_irqsave(&die.lock, flags);
+ __raw_spin_lock(&die.lock);
+ raw_local_save_flags(flags);
die.lock_owner = smp_processor_id();
die.lock_owner_depth = 0;
bust_spinlocks(1);
}
else
- local_save_flags(flags);
+ raw_local_save_flags(flags);
if (++die.lock_owner_depth < 3) {
unsigned long esp;
@@ -415,7 +416,8 @@ void die(const char * str, struct pt_regs * regs, long err)
bust_spinlocks(0);
die.lock_owner = -1;
add_taint(TAINT_DIE);
- spin_unlock_irqrestore(&die.lock, flags);
+ __raw_spin_unlock(&die.lock);
+ raw_local_irq_restore(flags);
if (!regs)
return;