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s390/time: always use stckf instead of stck if available

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The store clock fast instruction saves a couple of instructions compared
to the store clock instruction. Always use stckf instead of stck if it
is available.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2012-05-09 16:27:39 +02:00
committed by Martin Schwidefsky
parent 2739b6d124
commit 473e66baad
5 changed files with 19 additions and 23 deletions
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2
arch/s390/kernel/early.c
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@@ -374,8 +374,6 @@ static __init void detect_machine_facilities(void)
S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
if (test_facility(40))
S390_lowcore.machine_flags |= MACHINE_FLAG_SPP;
if (test_facility(25))
S390_lowcore.machine_flags |= MACHINE_FLAG_STCKF;
#endif
}