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genirq: Fix misleading synchronize_irq() documentation

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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>
This commit is contained in:
Thomas Gleixner 2019-06-28 13:11:50 +02:00 • committed by Greg Kroah-Hartman
parent 578db1aa59
commit 3f10ccc297
1 changed files with 2 additions and 1 deletions
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3
kernel/irq/manage.c
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@ -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)
{