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| author | Thomas Gleixner | 2019-06-28 13:11:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-07-21 09:03:12 +0200 |
| commit | 3f10ccc29780b5ca8b1638941a47018f694ecbc7 (patch) | |
| tree | 4073352f59becb79db71509f390dd2b8cd081b9b /kernel | |
| parent | genirq: Delay deactivation in free_irq() (diff) | |
| download | kernel-qcow2-linux-3f10ccc29780b5ca8b1638941a47018f694ecbc7.tar.gz kernel-qcow2-linux-3f10ccc29780b5ca8b1638941a47018f694ecbc7.tar.xz kernel-qcow2-linux-3f10ccc29780b5ca8b1638941a47018f694ecbc7.zip | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/manage.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 5c76ed5271bb..f8214bbcf5c0 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -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) { |