diff options
Diffstat (limited to 'fs/fcntl.c')
| -rw-r--r-- | fs/fcntl.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c index 00be0a710bba..8eb6d64a985b 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -317,6 +317,13 @@ static long fcntl_set_rw_hint(struct file *file, unsigned int cmd, WRITE_ONCE(inode->i_write_hint, hint); + /* + * file->f_mapping->host may differ from inode. As an example, + * blkdev_open() modifies file->f_mapping. + */ + if (file->f_mapping->host != inode) + WRITE_ONCE(file->f_mapping->host->i_write_hint, hint); + return 0; } |