'\" t
.\"     Title: jbd2_journal_lock_updates
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: The Linux Journalling API
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "JBD2_JOURNAL_LOCK_UP" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "The Linux Journalling API"
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.SH "NAME"
jbd2_journal_lock_updates \- establish a transaction barrier\&.
.SH "SYNOPSIS"
.HP \w'void\ jbd2_journal_lock_updates('u
.BI "void jbd2_journal_lock_updates(journal_t\ *\ " "journal" ");"
.SH "ARGUMENTS"
.PP
\fIjournal_t * journal\fR
.RS 4
Journal to establish a barrier on\&.
.RE
.SH "DESCRIPTION"
.PP
This locks out any further updates from being started, and blocks until all existing updates have completed, returning only once the journal is in a quiescent state with no updates running\&.
.PP
The journal lock should not be held on entry\&.
.SH "AUTHORS"
.PP
\fBRoger Gammans\fR <\&rgammans@computer-surgery.co.uk\&>
.RS 4
Author.
.RE
.PP
\fBStephen Tweedie\fR <\&sct@redhat.com\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br