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 <[email protected]> Cc: Marc Zyngier <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
Noltari · Jul 3, 2019 · 1d21f2a · 1d21f2a
1 parent 4001d8e
commit 1d21f2a
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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)
 {