linux-kernel - [RFC PATCH 02/15] tty: ldsem_cmpxchg() should use cmpxchg() not atomic_long

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Message-ID: <146358425242.8596.10719266273243587481.stgit@warthog.procyon.org.uk>
Date:	Wed, 18 May 2016 16:10:52 +0100
From:	David Howells <dhowells@...hat.com>
To:	linux-arch@...r.kernel.org
Cc:	x86@...nel.org, will.deacon@....com, linux-kernel@...r.kernel.org,
	dhowells@...hat.com, ramana.radhakrishnan@....com,
	paulmck@...ux.vnet.ibm.com, dwmw2@...radead.org
Subject: [RFC PATCH 02/15] tty: ldsem_cmpxchg() should use cmpxchg() not
 atomic_long_cmpxchg()

ldsem_cmpxchg() should use cmpxchg() not atomic_long_cmpxchg() since the
variable it is wangling isn't an atomic_long_t.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Peter Hurley <peter@...leysoftware.com>
cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---

 drivers/tty/tty_ldsem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/tty_ldsem.c b/drivers/tty/tty_ldsem.c
index 1bf8ed13f827..dc27b285ba4f 100644
--- a/drivers/tty/tty_ldsem.c
+++ b/drivers/tty/tty_ldsem.c
@@ -86,7 +86,7 @@ static inline long ldsem_atomic_update(long delta, struct ld_semaphore *sem)
  */
 static inline int ldsem_cmpxchg(long *old, long new, struct ld_semaphore *sem)
 {
-	long tmp = atomic_long_cmpxchg(&sem->count, *old, new);
+	long tmp = cmpxchg(&sem->count, *old, new);
 	if (tmp == *old) {
 		*old = new;
 		return 1;