| commit | 491f6f8e5fd9a57aaf03b6d6e3e153f1c27d8a46 | [log] [tgz] |
|---|---|---|
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | Mon Sep 23 12:59:56 2013 +0200 |
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | Sat Sep 28 12:46:24 2013 +0200 |
| tree | 81cb77f31a841e87cecb9329f26e6524cc44f3a2 | |
| parent | 083986e8248d978b6c961d3da6beb0c921c68220 [diff] |
lockref: use arch_mutex_cpu_relax() in CMPXCHG_LOOP() Make use of arch_mutex_cpu_relax() so architectures can override the default cpu_relax() semantics. This is especially useful for s390, where cpu_relax() means that we yield() the current (virtual) cpu and therefore is very expensive, and would contradict the whole purpose of the lockless cmpxchg loop. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>