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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull x86 fix from Ingo Molnar:
 "irq-tracing fixlet"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tracing: Add irq_enter/exit() in smp_trace_reschedule_interrupt()
This commit is contained in:
Linus Torvalds 2013-07-10 10:17:01 -07:00
commit 23e3a1d971
1 changed files with 23 additions and 16 deletions
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39
arch/x86/kernel/smp.c
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@ -265,23 +265,30 @@ void smp_reschedule_interrupt(struct pt_regs *regs)
*/
}
void smp_trace_reschedule_interrupt(struct pt_regs *regs)
{
ack_APIC_irq();
trace_reschedule_entry(RESCHEDULE_VECTOR);
__smp_reschedule_interrupt();
trace_reschedule_exit(RESCHEDULE_VECTOR);
/*
* KVM uses this interrupt to force a cpu out of guest mode
*/
}
static inline void call_function_entering_irq(void)
static inline void smp_entering_irq(void)
{
ack_APIC_irq();
irq_enter();
}
void smp_trace_reschedule_interrupt(struct pt_regs *regs)
{
/*
* Need to call irq_enter() before calling the trace point.
* __smp_reschedule_interrupt() calls irq_enter/exit() too (in
* scheduler_ipi(). This is OK, since those functions are allowed
* to nest.
*/
smp_entering_irq();
trace_reschedule_entry(RESCHEDULE_VECTOR);
__smp_reschedule_interrupt();
trace_reschedule_exit(RESCHEDULE_VECTOR);
exiting_irq();
/*
* KVM uses this interrupt to force a cpu out of guest mode
*/
}
static inline void __smp_call_function_interrupt(void)
{
generic_smp_call_function_interrupt();
@ -290,14 +297,14 @@ static inline void __smp_call_function_interrupt(void)
void smp_call_function_interrupt(struct pt_regs *regs)
{
call_function_entering_irq();
smp_entering_irq();
__smp_call_function_interrupt();
exiting_irq();
}
void smp_trace_call_function_interrupt(struct pt_regs *regs)
{
call_function_entering_irq();
smp_entering_irq();
trace_call_function_entry(CALL_FUNCTION_VECTOR);
__smp_call_function_interrupt();
trace_call_function_exit(CALL_FUNCTION_VECTOR);
@ -312,14 +319,14 @@ static inline void __smp_call_function_single_interrupt(void)
void smp_call_function_single_interrupt(struct pt_regs *regs)
{
call_function_entering_irq();
smp_entering_irq();
__smp_call_function_single_interrupt();
exiting_irq();
}
void smp_trace_call_function_single_interrupt(struct pt_regs *regs)
{
call_function_entering_irq();
smp_entering_irq();
trace_call_function_single_entry(CALL_FUNCTION_SINGLE_VECTOR);
__smp_call_function_single_interrupt();
trace_call_function_single_exit(CALL_FUNCTION_SINGLE_VECTOR);