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lockref: include mutex.h rather than reinvent arch_mutex_cpu_relax 

arch_mutex_cpu_relax is already conditionally defined in mutex.h, so
simply include that header rather than replicate the code here.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Will Deacon 2013-11-27 13:52:53 +00:00 committed by Linus Torvalds
parent dad337501d
commit 14058d20c1
1 changed files with 1 additions and 8 deletions
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9
lib/lockref.c
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@ -1,5 +1,6 @@
#include <linux/export.h>
#include <linux/lockref.h>
#include <linux/mutex.h>
#if USE_CMPXCHG_LOCKREF
@ -11,14 +12,6 @@
# define cmpxchg64_relaxed cmpxchg64
#endif
/*
* Allow architectures to override the default cpu_relax() within CMPXCHG_LOOP.
* This is useful for architectures with an expensive cpu_relax().
*/
#ifndef arch_mutex_cpu_relax
# define arch_mutex_cpu_relax() cpu_relax()
#endif
/*
* Note that the "cmpxchg()" reloads the "old" value for the
* failure case.