commit e2f8c8752b994026fc0ddb4bb29ca229b3e0c104
author Helmut Schaa <helmut.schaa@googlemail.com> Thu Nov 04 20:38:56 2010 +0100
committer John W. Linville <linville@tuxdriver.com> Mon Nov 15 13:26:00 2010 -0500
tree 4ebaf573ce33eb5002b454eb0d432ddef31d51e5
parent 2b23cdaa3b0e9567597563e5a7a5103ecda447f0

rt2x00: Optimize rt2x00debug_dump_frame when frame dumping is not active

When rt2x00 is compiled with debugging but frame dumping is currently
not active we can avoid the call to do_gettimeofday. Furthermore,
frame dumping is not the default case, mark it as unlikely.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00debug.c

diff --git a/drivers/net/wireless/rt2x00/rt2x00debug.c b/drivers/net/wireless/rt2x00/rt2x00debug.c
index fcdb6b0..8296a9d 100644
--- a/drivers/net/wireless/rt2x00/rt2x00debug.c
+++ b/drivers/net/wireless/rt2x00/rt2x00debug.c
@@ -162,11 +162,11 @@
 	struct timeval timestamp;
 	u32 data_len;
 
-	do_gettimeofday(&timestamp);
-
-	if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
+	if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
 		return;
 
+	do_gettimeofday(&timestamp);
+
 	if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 		DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
 		return;