suse man page for synchronize_irq

SYNCHRONIZE_IRQ(9)						Hardware Interfaces						SYNCHRONIZE_IRQ(9)

NAME
       synchronize_irq - wait for pending IRQ handlers (on other CPUs)

SYNOPSIS
       void synchronize_irq(unsigned int irq);

ARGUMENTS
       irq
	   interrupt number to wait for

DESCRIPTION
       This function waits for any pending IRQ handlers for this interrupt 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.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							SYNCHRONIZE_IRQ(9)