From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 18 Nov 2019 12:01:22 +0100
Subject: block: Don't disable interrupts in trigger_softirq()
Patch-mainline: v5.5-rc1
Git-commit: de678bc63cc659d056a5ff3a3b11866d3eb4c1a9
References: bsc#1162702

trigger_softirq() is always invoked as a SMP-function call which is
always invoked with disables interrupts.

Don't disable interrupt in trigger_softirq() because interrupts are
already disabled.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 block/blk-softirq.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/block/blk-softirq.c
+++ b/block/blk-softirq.c
@@ -42,17 +42,13 @@ static __latent_entropy void blk_done_so
 static void trigger_softirq(void *data)
 {
 	struct request *rq = data;
-	unsigned long flags;
 	struct list_head *list;
 
-	local_irq_save(flags);
 	list = this_cpu_ptr(&blk_cpu_done);
 	list_add_tail(&rq->ipi_list, list);
 
 	if (list->next == &rq->ipi_list)
 		raise_softirq_irqoff(BLOCK_SOFTIRQ);
-
-	local_irq_restore(flags);
 }
 
 /*