Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > linux.kernel > #1199065

[tip:sched/core] sched/preempt, xen: Use need_resched() instead of should_resched()

From tip-bot for Konstantin Khlebnikov <tipbot@zytor.com>
Newsgroups linux.kernel
Subject [tip:sched/core] sched/preempt, xen: Use need_resched() instead of should_resched()
Date 2015-08-03 19:10 +0200
Message-ID <pTrpr-W6-73@gated-at.bofh.it> (permalink)
References <pMrDR-3RV-33@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw


Commit-ID:  0fa2f5cb2b0ecd8d56baa51f35f09aab234eb0bf
Gitweb:     http://git.kernel.org/tip/0fa2f5cb2b0ecd8d56baa51f35f09aab234eb0bf
Author:     Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
AuthorDate: Wed, 15 Jul 2015 12:52:01 +0300
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 3 Aug 2015 12:21:23 +0200

sched/preempt, xen: Use need_resched() instead of should_resched()

This code is used only when CONFIG_PREEMPT=n and only in non-atomic context:
xen_in_preemptible_hcall is set only in privcmd_ioctl_hypercall().
Thus preempt_count is zero and should_resched() is equal to need_resched().

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Graf <agraf@suse.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150715095201.12246.49283.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 drivers/xen/preempt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/preempt.c b/drivers/xen/preempt.c
index a1800c1..08cb419 100644
--- a/drivers/xen/preempt.c
+++ b/drivers/xen/preempt.c
@@ -31,7 +31,7 @@ EXPORT_SYMBOL_GPL(xen_in_preemptible_hcall);
 asmlinkage __visible void xen_maybe_preempt_hcall(void)
 {
 	if (unlikely(__this_cpu_read(xen_in_preemptible_hcall)
-		     && should_resched())) {
+		     && need_resched())) {
 		/*
 		 * Clear flag as we may be rescheduled on a different
 		 * cpu.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next | Find similar | Unroll thread


Thread

[tip:sched/core] sched/preempt, xen: Use need_resched()   instead of should_resched() tip-bot for Konstantin Khlebnikov <tipbot@zytor.com> - 2015-08-03 19:10 +0200

csiph-web