diff mbox

[2/3] arm/syscalls: Optimize work flags assembly check

Message ID 20170719175900.124074-2-thgarnie@google.com (mailing list archive)
State New, archived
Headers show

Commit Message

Thomas Garnier July 19, 2017, 5:58 p.m. UTC 
Remove the double branch and use tsteq instead.

Suggested-by: Russell King <linux@armlinux.org.uk>
Signed-off-by: Thomas Garnier <thgarnie@google.com>
---
 arch/arm/kernel/entry-common.S | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
diff mbox

Patch

diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index e33c32d56193..6e094b639d83 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -42,8 +42,7 @@  ret_fast_syscall:
 	disable_irq_notrace			@ disable interrupts
 	ldr	r1, [tsk, #TI_FLAGS]		@ re-check for syscall tracing
 	tst	r1, #_TIF_SYSCALL_WORK
-	bne	fast_work_pending
-	tst	r1, #_TIF_WORK_MASK
+	tsteq   r1, #_TIF_WORK_MASK
 	bne	fast_work_pending
 
 	/* perform architecture specific actions before user return */
@@ -70,14 +69,12 @@  ret_fast_syscall:
 	disable_irq_notrace			@ disable interrupts
 	ldr	r1, [tsk, #TI_FLAGS]		@ re-check for syscall tracing
 	tst	r1, #_TIF_SYSCALL_WORK
-	bne	fast_work_pending
-	tst	r1, #_TIF_WORK_MASK
+	tsteq   r1, #_TIF_WORK_MASK
 	beq	no_work_pending
  UNWIND(.fnend		)
 ENDPROC(ret_fast_syscall)
 
 	/* Slower path - fall through to work_pending */
-fast_work_pending:
 #endif
 
 	tst	r1, #_TIF_SYSCALL_WORK