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s390/time: fix get_tod_clock_ext inline assembly

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The get_tod_clock_ext inline assembly does not specify its output
operands correctly. This can cause incorrect code to be generated.

Cc: stable@vger.kernel.org # 3.12
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2013-10-28 11:17:10 +01:00
parent ac526f42ab
commit 7ab64a85e1
1 changed files with 4 additions and 2 deletions
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6
arch/s390/include/asm/timex.h
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@@ -71,9 +71,11 @@ static inline void local_tick_enable(unsigned long long comp)
typedef unsigned long long cycles_t; typedef unsigned long long cycles_t;
static inline void get_tod_clock_ext(char *clk) static inline void get_tod_clock_ext(char clk[16])
{ {
asm volatile("stcke %0" : "=Q" (*clk) : : "cc"); typedef struct { char _[sizeof(clk)]; } addrtype;
asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc");
} }
static inline unsigned long long get_tod_clock(void) static inline unsigned long long get_tod_clock(void)