diff options
Diffstat (limited to 'debian/patches-rt/0033-x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch')
| -rw-r--r-- | debian/patches-rt/0033-x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/debian/patches-rt/0033-x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch b/debian/patches-rt/0033-x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch new file mode 100644 index 000000000..69ddd41b3 --- /dev/null +++ b/debian/patches-rt/0033-x86-entry-Use-should_resched-in-idtentry_exit_cond_r.patch @@ -0,0 +1,36 @@ +From 37719a07083b68dad1449227e9fe66e8e6c9f2b6 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 33/62] x86/entry: Use should_resched() in + idtentry_exit_cond_resched() +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.1/older/patches-6.1.69-rt21.tar.xz + +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> +Signed-off-by: Thomas Gleixner <tglx@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 be61332c66b5..97ff5faad4fb 100644 +--- a/kernel/entry/common.c ++++ b/kernel/entry/common.c +@@ -386,7 +386,7 @@ void raw_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(); + } + } +-- +2.43.0 + |