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x86/mce: Remove duplicated tracing interrupt code

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Machine checks are not really high frequency events. The extra two NOP5s for
the disabled tracepoints are noise vs. the heavy lifting which needs to be
done in the MCE handler.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064957.144301907@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Thomas Gleixner
2017-08-28 08:47:28 +02:00
committed by Ingo Molnar
parent daabb8eb9a
commit 0f42ae283c
4 changed files with 10 additions and 48 deletions
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16
arch/x86/kernel/cpu/mcheck/threshold.c
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@@ -17,24 +17,12 @@ static void default_threshold_interrupt(void)
void (*mce_threshold_vector)(void) = default_threshold_interrupt;
static inline void __smp_threshold_interrupt(void)
{
inc_irq_stat(irq_threshold_count);
mce_threshold_vector();
}
asmlinkage __visible void __irq_entry smp_threshold_interrupt(void)
{
entering_irq();
__smp_threshold_interrupt();
exiting_ack_irq();
}
asmlinkage __visible void __irq_entry smp_trace_threshold_interrupt(void)
{
entering_irq();
trace_threshold_apic_entry(THRESHOLD_APIC_VECTOR);
__smp_threshold_interrupt();
inc_irq_stat(irq_threshold_count);
mce_threshold_vector();
trace_threshold_apic_exit(THRESHOLD_APIC_VECTOR);
exiting_ack_irq();
}