arm: trim _TIF_WORK_MASK, get rid of useless test and branch...

Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/arm/include/asm/thread_info.h

@@ -170,7 +170,7 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *,
 /*
  * Change these and you break ASM code in entry-common.S
  */
-#define _TIF_WORK_MASK		0x000000ff
+#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_NOTIFY_RESUME)
 
 #endif /* __KERNEL__ */
 #endif /* __ASM_ARM_THREAD_INFO_H */

arch/arm/kernel/entry-common.S

@@ -53,8 +53,9 @@ fast_work_pending:
 work_pending:
 	tst	r1, #_TIF_NEED_RESCHED
 	bne	work_resched
-	tst	r1, #_TIF_SIGPENDING|_TIF_NOTIFY_RESUME
-	beq	no_work_pending
+	/*
+	 * TIF_SIGPENDING or TIF_NOTIFY_RESUME must've been set if we got here
+	 */
 	mov	r0, sp				@ 'regs'
 	mov	r2, why				@ 'syscall'
 	tst	r1, #_TIF_SIGPENDING		@ delivering a signal?