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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-08-05 09:57:51 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-08-06 11:44:43 +0200 |
| commit | 36e7fdaa1a04fcf65b864232e1af56a51c7814d6 (patch) | |
| tree | fdc1603d6ea44a5c9033f4d1804d982e23708b71 /drivers/s390 | |
| parent | 152125b7a882df36a55a8eadbea6d0edf1461ee7 (diff) | |
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