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[S390] get_clock inline assembly.

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Add missing volatile to the get_clock / get_cycles inline assemblies
to avoid that consecutive calls get optimized away.

Signed-off-by: Andreas Krebbel <krebbel1@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Andreas Krebbel 2006-07-17 16:09:42 +02:00 committed by Martin Schwidefsky
parent 13ffa927ab
commit 53ba5e09fe
1 changed files with 2 additions and 2 deletions
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include/asm-s390/timex.h
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@ -19,7 +19,7 @@ static inline cycles_t get_cycles(void)
{ {
cycles_t cycles; cycles_t cycles;
__asm__("stck 0(%1)" : "=m" (cycles) : "a" (&cycles) : "cc"); __asm__ __volatile__ ("stck 0(%1)" : "=m" (cycles) : "a" (&cycles) : "cc");
return cycles >> 2; return cycles >> 2;
} }
@ -27,7 +27,7 @@ static inline unsigned long long get_clock (void)
{ {
unsigned long long clk; unsigned long long clk;
__asm__("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc"); __asm__ __volatile__ ("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");
return clk; return clk;
} }