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authorChristian Borntraeger <borntraeger@de.ibm.com>2014-08-05 11:57:51 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-08-06 13:44:43 +0400
commit36e7fdaa1a04fcf65b864232e1af56a51c7814d6 (patch)
treefdc1603d6ea44a5c9033f4d1804d982e23708b71 /drivers/s390
parent152125b7a882df36a55a8eadbea6d0edf1461ee7 (diff)
downloadlinux-36e7fdaa1a04fcf65b864232e1af56a51c7814d6.tar.xz
s390/locking: Reenable optimistic spinning
commit 4badad352a6bb202ec68afa7a574c0bb961e5ebc (locking/mutex: Disable optimistic spinning on some architectures) fenced spinning for architectures without proper cmpxchg. There is no need to disable mutex spinning on s390, though: The instructions CS,CSG and friends provide the proper guarantees. (We dont implement cmpxchg with locks). Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: <stable@vger.kernel.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
0 files changed, 0 insertions, 0 deletions