1.\" $OpenBSD: intr_barrier.9,v 1.2 2015/09/13 17:55:42 jmc Exp $ 2.\" 3.\" Copyright (c) 2015 Mark Kettenis 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: September 13 2015 $ 18.Dt INTR_BARRIER 9 19.Os 20.Sh NAME 21.Nm intr_barrier 22.Nd interrupt barrier 23.Sh SYNOPSIS 24.In machine/intr.h 25.Ft void 26.Fn intr_barrier "void *ih" 27.Sh DESCRIPTION 28This function guarantees that any interrupt handler invocations for the 29interrupt handler specified by 30.Fa ih 31has finished before it returns. 32The cookie passed to 33.Fn intr_barrier 34should be the value returned when the interrupt handler was established, 35for example the return value of 36.Xr pci_intr_establish 9 . 37.Sh CONTEXT 38.Fn intr_barrier 39can be called from process context. 40.Sh SEE ALSO 41.Xr pci_intr_establish 9 , 42.Xr spl 9 43