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From:   Vlastimil Babka <vbabka@suse.cz>
To:     linux-mm@kvack.org, Christoph Lameter <cl@linux.com>,
        David Rientjes <rientjes@google.com>,
        Pekka Enberg <penberg@kernel.org>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel@vger.kernel.org, Mike Galbraith <efault@gmx.de>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Thomas Gleixner <tglx@linutronix.de>,
        Mel Gorman <mgorman@techsingularity.net>,
        Vlastimil Babka <vbabka@suse.cz>
Subject: [PATCH v6 26/33] mm, slub: don't disable irqs in slub_cpu_dead()
Date:   Sat,  4 Sep 2021 12:49:56 +0200
Message-Id: <20210904105003.11688-27-vbabka@suse.cz>
In-Reply-To: <20210904105003.11688-1-vbabka@suse.cz>
References: <20210904105003.11688-1-vbabka@suse.cz>
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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(-)

diff --git a/mm/slub.c b/mm/slub.c
index c5766e504e73..c4a9b8901576 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2554,14 +2554,10 @@ 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;
 }
-- 
2.33.0