f2fs: allow readpages with NULL file pointer
Keep in line with the other Linux file system implementations
since page_cache_sync_readahead supports NULL file pointer,
and thus we can readahead data by f2fs itself without file opening
(something like the btrfs behavior).
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 36b5352..9b68fb7 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1334,7 +1334,7 @@ static int f2fs_read_data_pages(struct file *file,
struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
- struct inode *inode = file->f_mapping->host;
+ struct inode *inode = mapping->host;
struct page *page = list_last_entry(pages, struct page, lru);
trace_f2fs_readpages(inode, page, nr_pages);