Commit 3f10ccc2 authored Jun 28, 2019 by Thomas Gleixner Committed by Greg Kroah-Hartman Jul 21, 2019

genirq: Fix misleading synchronize_irq() documentation



commit 1d21f2af8571c6a6a44e7c1911780614847b0253 upstream

The function might sleep, so it cannot be called from interrupt
context. Not even with care.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/20190628111440.189241552@linutronix.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 578db1aa

kernel/irq/manage.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -96,7 +96,8 @@ EXPORT_SYMBOL(synchronize_hardirq);
		* to complete before returning. If you use this function while
		* holding a resource the IRQ handler may need you will deadlock.
		*
		* This function may be called - with care - from IRQ context.
		* Can only be called from preemptible code as it might sleep when
		* an interrupt thread is associated to @irq.
		*/
		void synchronize_irq(unsigned int irq)
		{