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Blackfin arch: make sure cycles is marked as volatile so gcc doesnt reorder on us
author
Mike Frysinger
<vapier.adi@gmail.com>
Thu, 16 Oct 2008 15:55:41 +0000
(23:55 +0800)
committer
Bryan Wu
<cooloney@kernel.org>
Thu, 16 Oct 2008 15:55:41 +0000
(23:55 +0800)
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
arch/blackfin/include/asm/timex.h
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diff --git
a/arch/blackfin/include/asm/timex.h
b/arch/blackfin/include/asm/timex.h
index 22b0806161bb614b2179c7ec1eee002a0255779e..248aeb06680527f49dd24d3e559295ac9fdf78ed 100644
(file)
--- a/
arch/blackfin/include/asm/timex.h
+++ b/
arch/blackfin/include/asm/timex.h
@@
-16,7
+16,7
@@
typedef unsigned long long cycles_t;
static inline cycles_t get_cycles(void)
{
unsigned long tmp, tmp2;
- __asm__("%0 = cycles; %1 = cycles2;" : "=d"(tmp), "=d"(tmp2));
+ __asm__
__volatile__
("%0 = cycles; %1 = cycles2;" : "=d"(tmp), "=d"(tmp2));
return tmp | ((cycles_t)tmp2 << 32);
}