From: P J P <ppandit@redhat.com>
Date: Wed, 3 Apr 2013 02:38:00 +0000 (+0900)
Subject: f2fs: add NULL pointer check
X-Git-Tag: v3.10-rc1~45^2~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cfb185a1488810fbae9256c7d52f66c558c6ea04;p=pandora-kernel.git

f2fs: add NULL pointer check

Commit - fa9150a84c - replaces a call to generic_writepages() in
f2fs_write_data_pages() with write_cache_pages(), with a function pointer
argument pointing to routine: __f2fs_writepage.

  -> https://git.kernel.org/linus/fa9150a84ca333f68127097c4fa1eda4b3913a22

  This patch adds a NULL pointer check in f2fs_write_data_pages() to avoid
  a possible NULL pointer dereference, in case if - mapping->a_ops->writepage -
  is NULL.

Signed-off-by: P J P <ppandit@redhat.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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