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(parent: 39d4cf8) | patch
s390: remove diag 44 calls from cpu_relax()
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Mon, 15 Sep 2014 08:50:47 +0000 (10:50 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Fri, 28 Nov 2014 08:47:49 +0000 (09:47 +0100)
commit10d8c7c08ce3d64e0dc58fc8f335e1b6ed97e20e
treeb31e48250675ef28f5fb3b52ad0863c3feafeba3tree | snapshot
parent39d4cf89e323ddb412990c1ec6c56cb1a84580d7commit | diff
s390: remove diag 44 calls from cpu_relax()

Simplify cpu_relax() to a simple barrier(). Performance wise this doesn't
seem to make any big difference anymore, since nearly all lock variants
have directed yield semantics in the meantime.
Also this makes s390 behave like all other architectures.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/include/asm/processor.h diff | blob | history
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