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authorPeter Zijlstra <peterz@infradead.org>2017-06-07 18:51:27 +0300
committerIngo Molnar <mingo@kernel.org>2017-08-10 13:29:03 +0300
commita9668cd6ee288c4838bc668880ac085be551cac2 (patch)
tree5a4b71cef5d9f8acf8f2c67c4c518146b1c49a51 /include/linux/spinlock.h
parentd89e588ca4081615216cc25f2489b0281ac0bfe9 (diff)
downloadlinux-a9668cd6ee288c4838bc668880ac085be551cac2.tar.xz
locking: Remove smp_mb__before_spinlock()
Now that there are no users of smp_mb__before_spinlock() left, remove it entirely. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/spinlock.h')
-rw-r--r--include/linux/spinlock.h13
1 files changed, 0 insertions, 13 deletions
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 840281095933..4e8cce19b507 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -118,19 +118,6 @@ do { \
#endif
/*
- * Despite its name it doesn't necessarily has to be a full barrier.
- * It should only guarantee that a STORE before the critical section
- * can not be reordered with LOADs and STOREs inside this section.
- * spin_lock() is the one-way barrier, this LOAD can not escape out
- * of the region. So the default implementation simply ensures that
- * a STORE can not move into the critical section, smp_wmb() should
- * serialize it with another STORE done by spin_lock().
- */
-#ifndef smp_mb__before_spinlock
-#define smp_mb__before_spinlock() smp_wmb()
-#endif
-
-/*
* This barrier must provide two things:
*
* - it must guarantee a STORE before the spin_lock() is ordered against a