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Commit 53ba5e09 authored by Andreas Krebbel's avatar Andreas Krebbel Committed by Martin Schwidefsky
Browse files

[S390] get_clock inline assembly. 



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

Signed-off-by: default avatarAndreas Krebbel <krebbel1@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 13ffa927

include/asm-s390/timex.h

+2 −2
Original line number Diff line number Diff line
@@ -19,7 +19,7 @@ static inline cycles_t get_cycles(void) 
{

	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;

}
@@ -27,7 +27,7 @@ static inline unsigned long long get_clock (void) 
{

	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;

}