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Commit 17c0e710 authored by Ingo Molnar's avatar Ingo Molnar Committed by Thomas Gleixner
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x86: Mark atomic irq ops raw for 32bit legacy 



The atomic ops emulation for 32bit legacy CPUs floods the tracer with
irq off/on entries. The irq disabled regions are short and therefor
not interesting when chasing long irq disabled latencies. Mark them
raw and keep them out of the trace.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 3bef4447

arch/x86/include/asm/atomic.h

+2 −2
Original line number Diff line number Diff line
@@ -187,10 +187,10 @@ static inline int atomic_add_return(int i, atomic_t *v) 


#ifdef CONFIG_M386

no_xadd: /* Legacy 386 processor */

	local_irq_save(flags);

	raw_local_irq_save(flags);

	__i = atomic_read(v);

	atomic_set(v, i + __i);

	local_irq_restore(flags);

	raw_local_irq_restore(flags);

	return i + __i;

#endif

}