tree 57d6234fa2eb33f861eaea4cee4a40a3ae44c09e
parent 81280572ca6f54009edfa4deee563e8678784218
author Theodore Ts'o <tytso@mit.edu> 1288301637 -0400
committer Theodore Ts'o <tytso@mit.edu> 1288301637 -0400

ext4: BUG_ON fix: check if page has buffers before calling page_buffers() 

We need to make check if a page does not have buffes by checking
page_has_buffers(page) before calling page_buffers(page) in
ext4_writepage().  Otherwise page_buffers() could throw a BUG_ON.

Thanks also to Markus Trippelsdorf and Avinash Kurup who also reported
the problem.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reported-by: Sedat Dilek <sedat.dilek@googlemail.com>
Tested-by: Sedat Dilek <sedat.dilek@googlemail.com>