'\" t
.\"     Title: bdev_write_page
.\"    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 "BDEV_WRITE_PAGE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "The Linux VFS"
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.SH "NAME"
bdev_write_page \- Start writing a page to a block device
.SH "SYNOPSIS"
.HP \w'int\ bdev_write_page('u
.BI "int bdev_write_page(struct\ block_device\ *\ " "bdev" ", sector_t\ " "sector" ", struct\ page\ *\ " "page" ", struct\ writeback_control\ *\ " "wbc" ");"
.SH "ARGUMENTS"
.PP
\fIbdev\fR
.RS 4
The device to write the page to
.RE
.PP
\fIsector\fR
.RS 4
The offset on the device to write the page to (need not be aligned)
.RE
.PP
\fIpage\fR
.RS 4
The page to write
.RE
.PP
\fIwbc\fR
.RS 4
The writeback_control for the write
.RE
.SH "DESCRIPTION"
.PP
On entry, the page should be locked and not currently under writeback\&. On exit, if the write started successfully, the page will be unlocked and under writeback\&. If the write failed already (eg the driver failed to queue the page to the device), the page will still be locked\&. If the caller is a \->writepage implementation, it will need to unlock the page\&.
.PP
Errors returned by this function are usually
\(lqsoft\(rq, eg out of memory, or queue full; callers should try a different route to write this page rather than propagate an error back up the stack\&.
.SH "RETURN"
.PP
negative errno if an error occurs, 0 if submission was successful\&.
.SH "COPYRIGHT"
.br