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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>
This commit is contained in:
Hsiang Kao 2017-09-24 02:45:42 +08:00 committed by Jaegeuk Kim
parent 14d8d5f7de
commit 71cb4afff8
1 changed files with 1 additions and 1 deletions
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2
fs/f2fs/data.c
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@ -1334,7 +1334,7 @@ static int f2fs_read_data_pages(struct file *file,
struct address_space *mapping, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages) 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); struct page *page = list_last_entry(pages, struct page, lru);
trace_f2fs_readpages(inode, page, nr_pages); trace_f2fs_readpages(inode, page, nr_pages);