linux/debian/patches-rt/0034-dm-rq-remove-BUG_ON-irqs_disabled-check.patch

From cc7b16e6616fa85c9349dd2eb9799b3748863aac Mon Sep 17 00:00:00 2001
Message-Id: <cc7b16e6616fa85c9349dd2eb9799b3748863aac.1596234183.git.zanussi@kernel.org>
In-Reply-To: <378ee68279f6a7631221f2670a9298620148690d.1596234183.git.zanussi@kernel.org>
References: <378ee68279f6a7631221f2670a9298620148690d.1596234183.git.zanussi@kernel.org>
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 27 Mar 2018 16:24:15 +0200
Subject: [PATCH 034/329] dm rq: remove BUG_ON(!irqs_disabled) check
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.135-rt60.tar.xz

In commit 052189a2ec95 ("dm: remove superfluous irq disablement in
dm_request_fn") the spin_lock_irq() was replaced with spin_lock() + a
check for disabled interrupts. Later the locking part was removed in
commit 2eb6e1e3aa87 ("dm: submit stacked requests in irq enabled
context") but the BUG_ON() check remained.

Since the original purpose for the "are-irqs-off" check is gone (the
->queue_lock has been removed) remove it.

Cc: Keith Busch <keith.busch@intel.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/md/dm-rq.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 4d36373e1c0f..12ed08245130 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -692,7 +692,6 @@ static void dm_old_request_fn(struct request_queue *q)
 		/* Establish tio->ti before queuing work (map_tio_request) */
 		tio->ti = ti;
 		kthread_queue_work(&md->kworker, &tio->work);
-		BUG_ON(!irqs_disabled());
 	}
 }
 
-- 
2.17.1