s390/vdso: replace stck with stcke

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If gettimeofday / clock_gettime are called multiple times in a row
the STCK instruction will stall until a difference in the result is
visible. This unnecessarily slows down the vdso calls, use stcke
instead of stck to get rid of the stall.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Martin Schwidefsky 2014-08-29 12:44:40 +02:00

parent 369e8c3553

commit 070b7be633

4 changed files with 12 additions and 12 deletions

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8

arch/s390/kernel/vdso32/clock_gettime.S

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4

arch/s390/kernel/vdso32/gettimeofday.S

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8

arch/s390/kernel/vdso64/clock_gettime.S

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4

arch/s390/kernel/vdso64/gettimeofday.S

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