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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-11-18 20:48:42 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-11-24 11:25:44 +0100 |
| commit | 74d862b682f51e45d25b95b1ecf212428a4967b0 (patch) | |
| tree | 69c1c8a1105267cd8afc5a1c1b1ff019bcf9e37e /kernel/sched/sched.h | |
| parent | fa50e2b452c60cff9f4000de5b372a61d6695c26 (diff) | |
| download | lwn-74d862b682f51e45d25b95b1ecf212428a4967b0.tar.gz lwn-74d862b682f51e45d25b95b1ecf212428a4967b0.zip | |
sched: Make migrate_disable/enable() independent of RT
Now that the scheduler can deal with migrate disable properly, there is no
real compelling reason to make it only available for RT.
There are quite some code pathes which needlessly disable preemption in
order to prevent migration and some constructs like kmap_atomic() enforce
it implicitly.
Making it available independent of RT allows to provide a preemptible
variant of kmap_atomic() and makes the code more consistent in general.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Grudgingly-Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20201118204007.269943012@linutronix.de
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 590e6f27068c..f5acb6c5ce49 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1056,7 +1056,7 @@ struct rq { struct cpuidle_state *idle_state; #endif -#if defined(CONFIG_PREEMPT_RT) && defined(CONFIG_SMP) +#ifdef CONFIG_SMP unsigned int nr_pinned; #endif unsigned int push_busy; @@ -1092,7 +1092,7 @@ static inline int cpu_of(struct rq *rq) static inline bool is_migration_disabled(struct task_struct *p) { -#if defined(CONFIG_SMP) && defined(CONFIG_PREEMPT_RT) +#ifdef CONFIG_SMP return p->migration_disabled; #else return false; |