'\" t
.\"     Title: mark_buffer_dirty
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: The Linux VFS
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "MARK_BUFFER_DIRTY" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "The Linux VFS"
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.SH "NAME"
mark_buffer_dirty \- mark a buffer_head as needing writeout
.SH "SYNOPSIS"
.HP \w'void\ mark_buffer_dirty('u
.BI "void mark_buffer_dirty(struct\ buffer_head\ *\ " "bh" ");"
.SH "ARGUMENTS"
.PP
\fIbh\fR
.RS 4
the buffer_head to mark dirty
.RE
.SH "DESCRIPTION"
.PP
\fBmark_buffer_dirty\fR
will set the dirty bit against the buffer, then set its backing page dirty, then tag the page as dirty in its address_space\*(Aqs radix tree and then attach the address_space\*(Aqs inode to its superblock\*(Aqs dirty inode list\&.
.PP
\fBmark_buffer_dirty\fR
is atomic\&. It takes bh\->b_page\->mapping\->private_lock, mapping\->tree_lock and mapping\->host\->i_lock\&.
.SH "COPYRIGHT"
.br