Re: [PATCH] blk-mq: avoid stall during boot due to synchronize_rcu_expedited

[Bart Van Assche]

On 1/6/26 8:56 AM, Mikulas Patocka wrote:

--- linux-2.6.orig/block/blk-mq.c       2026-01-06 16:45:11.000000000 +0100
+++ linux-2.6/block/blk-mq.c    2026-01-06 16:48:00.000000000 +0100
@@ -4553,8 +4553,7 @@ static void __blk_mq_realloc_hw_ctxs(str
                 * Make sure reading the old queue_hw_ctx from other
                 * context concurrently won't trigger uaf.
                 */
-               synchronize_rcu_expedited();
-               kfree(hctxs);
+               kfree_rcu_mightsleep(hctxs);
                hctxs = new_hctxs;
        }

Reviewed-by: Bart Van Assche <bvanass...@acm.org>