locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition

cmpxchg64_relaxed() is now defined by linux/atomic.h, so we can
remove our local definition from the lockref code.

Signed-off-by: Will Deacon <will.deacon@arm.com>
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>
Cc: Waiman.Long@hp.com
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1438880084-18856-5-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/lib/lockref.c b/lib/lockref.c
index 494994bf17c8ec9764cbb784cbd88840fa0919c9..5a92189ad711af195f501fce9a3c5e2844ed11a1 100644 (file)
--- a/lib/lockref.c
+++ b/lib/lockref.c
@@ -3,14 +3,6 @@
 
 #if USE_CMPXCHG_LOCKREF
 
-/*
- * Allow weakly-ordered memory architectures to provide barrier-less
- * cmpxchg semantics for lockref updates.
- */
-#ifndef cmpxchg64_relaxed
-# define cmpxchg64_relaxed cmpxchg64
-#endif
-
 /*
  * Note that the "cmpxchg()" reloads the "old" value for the
  * failure case.