From: Matthew Wilcox <matthew.r.wilcox@intel.com>
Date: Wed, 4 Jun 2014 23:07:46 +0000 (-0700)
Subject: fs/block_dev.c: add bdev_read_page() and bdev_write_page()
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~56^2~16^2~176
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47a191fd38ebddb1bd1510ec2bc1085c578c8868;p=pandora-kernel.git

fs/block_dev.c: add bdev_read_page() and bdev_write_page()

A block device driver may choose to provide a rw_page operation.  These
will be called when the filesystem is attempting to do page sized I/O to
page cache pages (ie not for direct I/O).  This does preclude I/Os that
are larger than page size, so this may only be a performance gain for
some devices.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Tested-by: Dheeraj Reddy <dheeraj.reddy@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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