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arch: Implement local64_t

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On 64bit, local_t is of size long, and thus we make local64_t an alias.
On 32bit, we fall back to atomic64_t. (architecture can provide optimized
32-bit version)

(This new facility is to be used by perf events optimizations.)

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-arch@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2010-05-21 14:05:13 +02:00
committed by Ingo Molnar
parent d57e34fdd6
commit 1996bda2a4
23 changed files with 118 additions and 0 deletions
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arch/sparc/include/asm/local64.h Normal file
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#include <asm-generic/local64.h>