From: Vlastimil Babka <vbabka@suse.cz>
Date: Fri, 21 May 2021 01:48:56 +0200
Subject: mm, slub: don't disable irqs in slub_cpu_dead()
Git-commit: 0e7ac738f785e695acfa1203a87f6a505305542a
Patch-mainline: v5.15-rc1
References: bsc#1189998

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(-)

--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2554,14 +2554,10 @@ static void flush_all(struct kmem_cache
 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;
 }