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Commit 671f837a authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: BUG_ON fix: check if page has buffers before calling page_buffers()
parents c9e2a72f b1142e8f

fs/ext4/inode.c

+5 −7
Original line number Diff line number Diff line
@@ -2718,7 +2718,7 @@ static int ext4_writepage(struct page *page, 
	 * try to create them using __block_write_begin.  If this

	 * fails, redirty the page and move on.

	 */

	if (!page_buffers(page)) {

	if (!page_has_buffers(page)) {

		if (__block_write_begin(page, 0, len,

					noalloc_get_block_write)) {

		redirty_page:
@@ -2732,12 +2732,10 @@ static int ext4_writepage(struct page *page, 
	if (walk_page_buffers(NULL, page_bufs, 0, len, NULL,

			      ext4_bh_delay_or_unwritten)) {

		/*

		 * We don't want to do block allocation So redirty the

		 * page and return We may reach here when we do a

		 * journal commit via

		 * journal_submit_inode_data_buffers.  If we don't

		 * have mapping block we just ignore them. We can also

		 * reach here via shrink_page_list

		 * We don't want to do block allocation, so redirty

		 * the page and return.  We may reach here when we do

		 * a journal commit via journal_submit_inode_data_buffers.

		 * We can also reach here via shrink_page_list

		 */

		goto redirty_page;

	}