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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-06-28 13:11:50 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-03 10:12:29 +0200 |
| commit | 1d21f2af8571c6a6a44e7c1911780614847b0253 (patch) | |
| tree | 616e00dc452c4dcd9d978d70c2b29d42593f60cb | |
| parent | 4001d8e8762f57d418b66e4e668601791900a1dd (diff) | |
| download | linux-1d21f2af8571c6a6a44e7c1911780614847b0253.tar.bz2 | |
genirq: Fix misleading synchronize_irq() documentation
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
| -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 dc8b35f2d545..44fc505815d6 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) { |