SCSI: logging optimisation

From: garloff@suse.de

Optimization.

Tell the compiler that the SCSI LOG will not likely happen.

drivers/scsi/scsi_logging.h

@@ -46,7 +46,7 @@ extern unsigned int scsi_logging_level;
 
 #define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD)		\
 {								\
-        if ((SCSI_LOG_LEVEL(SHIFT, BITS)) > (LEVEL))		\
+        if (unlikely((SCSI_LOG_LEVEL(SHIFT, BITS)) > (LEVEL)))	\
 		(CMD);						\
 }
 #else