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Commit 5042afe7 authored by Ingo Molnar's avatar Ingo Molnar Committed by Ingo Molnar
Browse files

generic: Use raw local irq variant for generic cmpxchg 



The interrupt disabled region is extremly tiny and therefor not
latency relevant. Avoid cluttering the traces with those pointless
entries.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 9fb1b90c

include/asm-generic/cmpxchg-local.h

+4 −4
Original line number Diff line number Diff line
@@ -21,7 +21,7 @@ static inline unsigned long __cmpxchg_local_generic(volatile void *ptr, 
	if (size == 8 && sizeof(unsigned long) != 8)

		wrong_size_cmpxchg(ptr);



	local_irq_save(flags);

	raw_local_irq_save(flags);

	switch (size) {

	case 1: prev = *(u8 *)ptr;

		if (prev == old)
@@ -42,7 +42,7 @@ static inline unsigned long __cmpxchg_local_generic(volatile void *ptr, 
	default:

		wrong_size_cmpxchg(ptr);

	}

	local_irq_restore(flags);

	raw_local_irq_restore(flags);

	return prev;

}
@@ -55,11 +55,11 @@ static inline u64 __cmpxchg64_local_generic(volatile void *ptr, 
	u64 prev;

	unsigned long flags;



	local_irq_save(flags);

	raw_local_irq_save(flags);

	prev = *(u64 *)ptr;

	if (prev == old)

		*(u64 *)ptr = new;

	local_irq_restore(flags);

	raw_local_irq_restore(flags);

	return prev;

}