From: Frank Swiderski <fes@chromium.org>
Date: Mon, 15 Nov 2010 18:43:22 +0000 (-0800)
Subject: ecryptfs: remove unnecessary decrypt when extending a file
X-Git-Tag: v2.6.38-rc1~17^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24562486be76cf223b8d911f45e1d26eb3364b13;p=pandora-kernel.git

ecryptfs: remove unnecessary decrypt when extending a file

Removes an unecessary page decrypt from ecryptfs_begin_write when the
page is beyond the current file size. Previously, the call to
ecryptfs_decrypt_page would result in a read of 0 bytes, but still
attempt to decrypt an entire page. This patch detects that case and
merely zeros the page before marking it up-to-date.

Signed-off-by: Frank Swiderski <fes@chromium.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
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