summaryrefslogtreecommitdiffstats
path: root/include/asm-sh/atomic.h
diff options
context:
space:
mode:
authorIngo Molnar2006-01-10 00:59:17 +0100
committerIngo Molnar2006-01-10 00:59:17 +0100
commitffbf670f5cd50501a34a5187981460da2216071e (patch)
treef2cd9eeeb59839d15feddf906310bb375474c573 /include/asm-sh/atomic.h
parentMerge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb (diff)
downloadkernel-qcow2-linux-ffbf670f5cd50501a34a5187981460da2216071e.tar.gz
kernel-qcow2-linux-ffbf670f5cd50501a34a5187981460da2216071e.tar.xz
kernel-qcow2-linux-ffbf670f5cd50501a34a5187981460da2216071e.zip
[PATCH] mutex subsystem, add atomic_xchg() to all arches
add atomic_xchg() to all the architectures. Needed by the new mutex code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Diffstat (limited to 'include/asm-sh/atomic.h')
-rw-r--r--include/asm-sh/atomic.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-sh/atomic.h b/include/asm-sh/atomic.h
index 618d8e0de348..fb627de217f2 100644
--- a/include/asm-sh/atomic.h
+++ b/include/asm-sh/atomic.h
@@ -101,6 +101,8 @@ static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
return ret;
}
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+
static inline int atomic_add_unless(atomic_t *v, int a, int u)
{
int ret;