diff options
Diffstat (limited to 'features/rt/x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch')
| -rw-r--r-- | features/rt/x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/features/rt/x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch b/features/rt/x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch new file mode 100644 index 00000000..2d757aa5 --- /dev/null +++ b/features/rt/x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch @@ -0,0 +1,34 @@ +From ea85707dd291bf6df28d3d791e1169e8c9317c24 Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Tue, 30 Jun 2020 11:45:14 +0200 +Subject: [PATCH 164/191] x86/entry: Use should_resched() in + idtentry_exit_cond_resched() + +The TIF_NEED_RESCHED bit is inlined on x86 into the preemption counter. +By using should_resched(0) instead of need_resched() the same check can +be performed which uses the same variable as 'preempt_count()` which was +issued before. + +Use should_resched(0) instead need_resched(). + +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + kernel/entry/common.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/kernel/entry/common.c b/kernel/entry/common.c +index 2a7bcc744033..162c49016f0f 100644 +--- a/kernel/entry/common.c ++++ b/kernel/entry/common.c +@@ -396,7 +396,7 @@ void irqentry_exit_cond_resched(void) + rcu_irq_exit_check_preempt(); + if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) + WARN_ON_ONCE(!on_thread_stack()); +- if (need_resched()) ++ if (should_resched(0)) + preempt_schedule_irq(); + } + } +-- +2.19.1 + |