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From: Valentin Schneider <valentin.schneider@arm.com>
To: linux-kernel@vger.kernel.org
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>,
	Rich Felker <dalias@libc.org>,
	linux-sh@vger.kernel.org
Subject: [PATCH RESEND 6/7] sh: entry: Remove unneeded need_resched() loop
Date: Tue, 28 May 2019 11:48:47 +0100	[thread overview]
Message-ID: <20190528104848.13160-7-valentin.schneider@arm.com> (raw)
In-Reply-To: <20190528104848.13160-1-valentin.schneider@arm.com>

Since the enabling and disabling of IRQs within preempt_schedule_irq()
is contained in a need_resched() loop, we don't need the outer arch
code loop.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: linux-sh@vger.kernel.org
---
 arch/sh/kernel/entry-common.S | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index d31f66e82ce5..65a105de52a0 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -93,7 +93,7 @@ ENTRY(resume_kernel)
 	mov.l	@(TI_PRE_COUNT,r8), r0	! current_thread_info->preempt_count
 	tst	r0, r0
 	bf	noresched
-need_resched:
+
 	mov.l	@(TI_FLAGS,r8), r0	! current_thread_info->flags
 	tst	#_TIF_NEED_RESCHED, r0	! need_resched set?
 	bt	noresched
@@ -107,8 +107,6 @@ need_resched:
 	mov.l	1f, r0
 	jsr	@r0			! call preempt_schedule_irq
 	 nop
-	bra	need_resched
-	 nop
 
 noresched:
 	bra	__restore_all
-- 
2.20.1


  parent reply	other threads:[~2019-05-28 10:49 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-28 10:48 [PATCH RESEND 0/7] entry: preempt_schedule_irq() callers scrub Valentin Schneider
2019-05-28 10:48 ` [PATCH RESEND 1/7] sched/core: Fix preempt_schedule() interrupt return comment Valentin Schneider
2019-05-28 10:58   ` Valentin Schneider
2019-06-11 19:30     ` Thomas Gleixner
2019-05-28 10:48 ` [PATCH RESEND 2/7] csky: entry: Remove unneeded need_resched() loop Valentin Schneider
2019-05-29  1:48   ` Guo Ren
2019-05-28 10:48 ` [PATCH RESEND 3/7] h8300: " Valentin Schneider
2019-05-28 10:48 ` [PATCH RESEND 4/7] microblaze: " Valentin Schneider
2019-05-28 10:48 ` [PATCH RESEND 5/7] RISC-V: " Valentin Schneider
2019-05-30  4:09   ` Palmer Dabbelt
2019-05-30 16:37     ` Valentin Schneider
2019-05-28 10:48 ` Valentin Schneider [this message]
2019-05-28 10:48 ` [PATCH RESEND 7/7] sh64: " Valentin Schneider

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