tree 16c85061eabfcdece2487909bc08c45d2c01d84f
parent c1fccc0696bcaff6008c11865091f5ec4b0937ab
author Theodore Ts'o <tytso@mit.edu> 1254365861 -0400
committer Theodore Ts'o <tytso@mit.edu> 1254365861 -0400

ext4: fix a BUG_ON crash by checking that page has buffers attached to it

In ext4_num_dirty_pages() we were calling page_buffers() before
checking to see if the page actually had pages attached to it; this
would cause a BUG check crash in the inline function page_buffers().

Thanks to Markus Trippelsdorf for reporting this bug.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>