fs/mpage.c: fix mpage_writepage() for pages with buffers
authorMatthew Wilcox <willy@infradead.org>
Fri, 13 Oct 2017 22:58:15 +0000 (15:58 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 13 Oct 2017 23:18:33 +0000 (16:18 -0700)
commitf892760aa66a2d657deaf59538fb69433036767c
tree3a1cbccecb6c363e4fcc922127867ca89972e655
parente8c97af0c1f23d6ffedcaa3918861f2595e1db62
fs/mpage.c: fix mpage_writepage() for pages with buffers

When using FAT on a block device which supports rw_page, we can hit
BUG_ON(!PageLocked(page)) in try_to_free_buffers().  This is because we
call clean_buffers() after unlocking the page we've written.  Introduce
a new clean_page_buffers() which cleans all buffers associated with a
page and call it from within bdev_write_page().

[akpm@linux-foundation.org: s/PAGE_SIZE/~0U/ per Linus and Matthew]
Link: http://lkml.kernel.org/r/20171006211541.GA7409@bombadil.infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Reported-by: Toshi Kani <toshi.kani@hpe.com>
Reported-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Tested-by: Toshi Kani <toshi.kani@hpe.com>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/block_dev.c
fs/mpage.c
include/linux/buffer_head.h