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(parent: 6ebdf1c) | 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)
commit57f2ffe14fd125c240babd88b99d8a57d3ed060e
treeb31e48250675ef28f5fb3b52ad0863c3feafeba3tree | snapshot
parent6ebdf1c79d09ad3d65c714a79db0a0c141a013bacommit | 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
Domain: System / Kernel;