shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 20:07:46 +09:00
Code Issues Packages Projects Releases Wiki Activity

f2fs: fix bad prefetchw of NULL page

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

Fixes: f1e8866016 ("f2fs: expose f2fs_mpage_readpages")
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Kinglong Mee
2017-03-13 16:35:13 +08:00
committed by Jaegeuk Kim
parent 186a33ffeb
commit 8f3d1ba54b
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
fs/f2fs/data.c
View File

@@ -1150,9 +1150,10 @@ 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, GFP_KERNEL))