gigaset: remove pointless locking
Remove pointless taking of spinlock around reading a single pointer-sized
or smaller variable.
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
index 00e3160..af76482 100644
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -1936,14 +1936,7 @@
*/
static int gigaset_chars_in_buffer(struct cardstate *cs)
{
- unsigned long flags;
- unsigned bytes;
-
- spin_lock_irqsave(&cs->cmdlock, flags);
- bytes = cs->cmdbytes;
- spin_unlock_irqrestore(&cs->cmdlock, flags);
-
- return bytes;
+ return cs->cmdbytes;
}
/* gigaset_brkchars