diff mbox series

[005/200] ide: remove BUG_ON(in_interrupt() || irqs_disabled()) from ide_unregister()

Message ID 20201215030327.1xgifoCou%akpm@linux-foundation.org (mailing list archive)
State New, archived
Headers show
Series [001/200] kthread: add kthread_work tracepoints | expand

Commit Message

Andrew Morton Dec. 15, 2020, 3:03 a.m. UTC 
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: ide: remove BUG_ON(in_interrupt() || irqs_disabled()) from ide_unregister()

In the discussion about preempt count consistency across kernel
configurations:

 https://lore.kernel.org/r/20200914204209.256266093@linutronix.de/

it was concluded that the usage of in_interrupt() and related context
checks should be removed from non-core code.


Both BUG_ON()s in ide-probe.c were introduced in commit
   4015c949fb465 ("[PATCH] update ide core")

when ide_unregister() was extended with semaphore based locking.  Both
checks won't complain about disabled preemption which is also wrong.

The might_sleep() in today's mutex_lock() will complain about the
missuses.

Remove the BUG_ON() statements.

Link: https://lkml.kernel.org/r/20201120092421.1023428-3-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Jens Axboe <axboe@kernel.dk>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/ide/ide-probe.c |    3 ---
 1 file changed, 3 deletions(-)
diff mbox series

Patch

--- a/drivers/ide/ide-probe.c~ide-remove-bug_onin_interrupt-irqs_disabled-from-ide_unregister
+++ a/drivers/ide/ide-probe.c
@@ -1592,9 +1592,6 @@  EXPORT_SYMBOL_GPL(ide_port_unregister_de
 
 static void ide_unregister(ide_hwif_t *hwif)
 {
-	BUG_ON(in_interrupt());
-	BUG_ON(irqs_disabled());
-
 	mutex_lock(&ide_cfg_mtx);
 
 	if (hwif->present) {