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authorThomas Gleixner <tglx@linutronix.de>2020-11-18 20:48:42 +0100
committerThomas Gleixner <tglx@linutronix.de>2020-11-24 11:25:44 +0100
commit74d862b682f51e45d25b95b1ecf212428a4967b0 (patch)
tree69c1c8a1105267cd8afc5a1c1b1ff019bcf9e37e /lib
parentfa50e2b452c60cff9f4000de5b372a61d6695c26 (diff)
downloadlinux-74d862b682f51e45d25b95b1ecf212428a4967b0.tar.bz2
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 'lib')
-rw-r--r--lib/smp_processor_id.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
index faaa927ac2c8..1c1dbd300325 100644
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -26,7 +26,7 @@ unsigned int check_preemption_disabled(const char *what1, const char *what2)
if (current->nr_cpus_allowed == 1)
goto out;
-#if defined(CONFIG_SMP) && defined(CONFIG_PREEMPT_RT)
+#ifdef CONFIG_SMP
if (current->migration_disabled)
goto out;
#endif