diff options
| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-09-23 12:59:56 +0200 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-09-28 12:46:24 +0200 |
| commit | 491f6f8e5fd9a57aaf03b6d6e3e153f1c27d8a46 (patch) | |
| tree | 81cb77f31a841e87cecb9329f26e6524cc44f3a2 /arch | |
| parent | mutex: replace CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX with simple ifdef (diff) | |
| download | linux-dev-491f6f8e5fd9a57aaf03b6d6e3e153f1c27d8a46.tar.xz linux-dev-491f6f8e5fd9a57aaf03b6d6e3e153f1c27d8a46.zip | |
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>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions