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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-09-28 11:23:59 +0200 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-09-28 12:46:21 +0200 |
| commit | 083986e8248d978b6c961d3da6beb0c921c68220 (patch) | |
| tree | 1a760afa3f006b21d2464a226c2792dc59ab845d /include/linux/mutex.h | |
| parent | 6cac446bd37d9381815fe4c2b0e7b1fd1085000c (diff) | |
| download | lwn-083986e8248d978b6c961d3da6beb0c921c68220.tar.gz lwn-083986e8248d978b6c961d3da6beb0c921c68220.zip | |
mutex: replace CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX with simple ifdef
Linus suggested to replace
#ifndef CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX
#define arch_mutex_cpu_relax() cpu_relax()
#endif
with just a simple
#ifndef arch_mutex_cpu_relax
# define arch_mutex_cpu_relax() cpu_relax()
#endif
to get rid of CONFIG_HAVE_CPU_RELAX_SIMPLE. So architectures can
simply define arch_mutex_cpu_relax if they want an architecture
specific function instead of having to add a select statement in
their Kconfig in addition.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'include/linux/mutex.h')
| -rw-r--r-- | include/linux/mutex.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/mutex.h b/include/linux/mutex.h index ccd4260834c5..bab49da8a0f0 100644 --- a/include/linux/mutex.h +++ b/include/linux/mutex.h @@ -15,8 +15,8 @@ #include <linux/spinlock_types.h> #include <linux/linkage.h> #include <linux/lockdep.h> - #include <linux/atomic.h> +#include <asm/processor.h> /* * Simple, straightforward mutexes with strict semantics: @@ -175,8 +175,8 @@ extern void mutex_unlock(struct mutex *lock); extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock); -#ifndef CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX -#define arch_mutex_cpu_relax() cpu_relax() +#ifndef arch_mutex_cpu_relax +# define arch_mutex_cpu_relax() cpu_relax() #endif #endif |