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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-10-28 11:17:10 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-10-31 09:52:48 +0100 |
| commit | 7ab64a85e1a009046f97413a573e83fd85f7804d (patch) | |
| tree | a888f86f440089d79c611ff166caf743d5ce136a | |
| parent | ac526f42abdae2cdc3ae1a24c855f731e1a90232 (diff) | |
| download | linux-7ab64a85e1a009046f97413a573e83fd85f7804d.tar.bz2 | |
s390/time: fix get_tod_clock_ext inline assembly
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>
| -rw-r--r-- | arch/s390/include/asm/timex.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h index 819b94d22720..8beee1cceba4 100644 --- a/arch/s390/include/asm/timex.h +++ b/arch/s390/include/asm/timex.h @@ -71,9 +71,11 @@ static inline void local_tick_enable(unsigned long long comp) 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) |