| From: Amir Goldstein <amir73il@gmail.com> |
| Date: Sun, 13 May 2018 22:40:30 -0400 |
| Subject: vfs: add the sb_start_intwrite_trylock() helper |
| |
| commit 0c8e3fe35db9b66ae0030849545030ec7c0fc45c upstream. |
| |
| Needed by ext4 to test frozen fs before updating s_last_mounted. |
| |
| Signed-off-by: Amir Goldstein <amir73il@gmail.com> |
| Signed-off-by: Theodore Ts'o <tytso@mit.edu> |
| Reviewed-by: Jan Kara <jack@suse.cz> |
| Signed-off-by: Ben Hutchings <ben@decadent.org.uk> |
| --- |
| include/linux/fs.h | 5 +++++ |
| 1 file changed, 5 insertions(+) |
| |
| --- a/include/linux/fs.h |
| +++ b/include/linux/fs.h |
| @@ -1389,6 +1389,11 @@ static inline void sb_start_intwrite(str |
| __sb_start_write(sb, SB_FREEZE_FS, true); |
| } |
| |
| +static inline int sb_start_intwrite_trylock(struct super_block *sb) |
| +{ |
| + return __sb_start_write(sb, SB_FREEZE_FS, false); |
| +} |
| + |
| |
| extern bool inode_owner_or_capable(const struct inode *inode); |
| |
