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[RFC,24/26] mm, slub: don't disable irqs in slub_cpu_dead()

Message ID 20210524233946.20352-25-vbabka@suse.cz (mailing list archive)
State New, archived
Headers show
Series SLUB: use local_lock for kmem_cache_cpu protection and reduce disabling irqs | expand

Commit Message

Vlastimil Babka May 24, 2021, 11:39 p.m. UTC 
slub_cpu_dead() cleans up for an offlined cpu from another cpu and calls only
functions that are now irq safe, so we don't need to disable irqs anymore.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
 mm/slub.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
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Patch

diff --git a/mm/slub.c b/mm/slub.c
index aee83758bbc4..bfa5e7c4da1b 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2515,14 +2515,10 @@  static void flush_all(struct kmem_cache *s)
 static int slub_cpu_dead(unsigned int cpu)
 {
 	struct kmem_cache *s;
-	unsigned long flags;
 
 	mutex_lock(&slab_mutex);
-	list_for_each_entry(s, &slab_caches, list) {
-		local_irq_save(flags);
+	list_for_each_entry(s, &slab_caches, list)
 		__flush_cpu_slab(s, cpu);
-		local_irq_restore(flags);
-	}
 	mutex_unlock(&slab_mutex);
 	return 0;
 }