synchronize_hardirq (9) - Linux Manuals

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

Command to display synchronize_hardirq manual in Linux: $ man 9 synchronize_hardirq

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.