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authorHeiko Carstens <heiko.carstens@de.ibm.com>2013-09-28 11:23:59 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2013-09-28 12:46:21 +0200
commit083986e8248d978b6c961d3da6beb0c921c68220 (patch)
tree1a760afa3f006b21d2464a226c2792dc59ab845d /include/linux/mutex.h
parent6cac446bd37d9381815fe4c2b0e7b1fd1085000c (diff)
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.h6
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