Commit a83d50bc authored Mar 13, 2017 by Kinglong Mee Committed by Jaegeuk Kim Mar 21, 2017

f2fs: fix bad prefetchw of NULL page



For f2fs_read_data_pages, the f2fs_mpage_readpages gets "page == NULL",
so that, the prefetchw(&page->flags) is operated on NULL.

Fixes: f1e88660 ("f2fs: expose f2fs_mpage_readpages")
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent bd4667cb

fs/f2fs/data.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1151,9 +1151,10 @@ static int f2fs_mpage_readpages(struct address_space *mapping,

		for (page_idx = 0; nr_pages; page_idx++, nr_pages--) {

		prefetchw(&page->flags);
		if (pages) {
		page = list_last_entry(pages, struct page, lru);

		prefetchw(&page->flags);
		list_del(&page->lru);
		if (add_to_page_cache_lru(page, mapping,
		page->index,