From: Vlastimil Babka <vbabka@suse.cz>
Date: Thu, 20 May 2021 14:01:57 +0200
Subject: mm, slub: discard slabs in unfreeze_partials() without irqs disabled
Git-commit: 8de06a6f48f2062444a8872eb7f5abbfe65b5ecd
Patch-mainline: v5.15-rc1
References: bsc#1189998

No need for disabled irqs when discarding slabs, so restore them before
discarding.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
 mm/slub.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2406,6 +2406,8 @@ static void unfreeze_partials(struct kme
 	if (n)
 		spin_unlock(&n->list_lock);
 
+	local_irq_restore(flags);
+
 	while (discard_page) {
 		page = discard_page;
 		discard_page = discard_page->next;
@@ -2415,7 +2417,6 @@ static void unfreeze_partials(struct kme
 		stat(s, FREE_SLAB);
 	}
 
-	local_irq_restore(flags);
 #endif	/* CONFIG_SLUB_CPU_PARTIAL */
 }