x86, perfcounters: add atomic64_xchg()
authorIngo Molnar <mingo@elte.hu>
Tue, 7 Apr 2009 09:30:17 +0000 (11:30 +0200)
committerIngo Molnar <mingo@elte.hu>
Tue, 7 Apr 2009 10:02:41 +0000 (12:02 +0200)
Complete atomic64_t support on the 32-bit side by adding atomic64_xch().

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090406094518.445450972@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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