'\" t
.\"     Title: requeue_pi_wake_futex
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Futex API reference
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "REQUEUE_PI_WAKE_FUTE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Futex API reference"
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.SH "NAME"
requeue_pi_wake_futex \- Wake a task that acquired the lock during requeue
.SH "SYNOPSIS"
.HP \w'void\ requeue_pi_wake_futex('u
.BI "void requeue_pi_wake_futex(struct\ futex_q\ *\ " "q" ", union\ futex_key\ *\ " "key" ", struct\ futex_hash_bucket\ *\ " "hb" ");"
.SH "ARGUMENTS"
.PP
\fIq\fR
.RS 4
the futex_q
.RE
.PP
\fIkey\fR
.RS 4
the key of the requeue target futex
.RE
.PP
\fIhb\fR
.RS 4
the hash_bucket of the requeue target futex
.RE
.SH "DESCRIPTION"
.PP
During futex_requeue, with requeue_pi=1, it is possible to acquire the target futex if it is uncontended or via a lock steal\&. Set the futex_q key to the requeue target futex so the waiter can detect the wakeup on the right futex, but remove it from the hb and NULL the rt_waiter so it can detect atomic lock acquisition\&. Set the q\->lock_ptr to the requeue target hb\->lock to protect access to the pi_state to fixup the owner later\&. Must be called with both q\->lock_ptr and hb\->lock held\&.
.SH "AUTHOR"
.PP
\fBRusty Russell\fR <\&rusty@rustcorp.com.au\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br