SYNCHRONIZE_HARDIRQ(9)              Public Functions Provided              SYNCHRONIZE_HARDIRQ(9)



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

SYNOPSIS
       bool synchronize_hardirq(unsigned int irq);

ARGUMENTS
       irq
           interrupt number to wait for

DESCRIPTION
       This function waits for any pending hard 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. It does not take associated threaded handlers into account.

       Do not use this for shutdown scenarios where you must be sure that all parts (hardirq and
       threaded handler) have completed.

RETURN
       false if a threaded handler is active.

       This function may be called - with care - from IRQ context.

AUTHORS
       Thomas Gleixner <tglx AT linutronix.de>
           Author.

       Ingo Molnar <mingo AT elte.hu>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                    SYNCHRONIZE_HARDIRQ(9)