diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index e8cd6b839675..43db02e9c9fa 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2091,7 +2091,7 @@ extern struct block_device *blkdev_get_by_path(const char *path, fmode_t mode, void *holder); extern struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder); -extern int blkdev_put(struct block_device *bdev, fmode_t mode); +extern void blkdev_put(struct block_device *bdev, fmode_t mode); #ifdef CONFIG_SYSFS extern int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk); extern void bd_unlink_disk_holder(struct block_device *bdev, @@ -2227,6 +2227,13 @@ static inline void file_start_write(struct file *file) __sb_start_write(file_inode(file)->i_sb, SB_FREEZE_WRITE, true); } +static inline bool file_start_write_trylock(struct file *file) +{ + if (!S_ISREG(file_inode(file)->i_mode)) + return true; + return __sb_start_write(file_inode(file)->i_sb, SB_FREEZE_WRITE, false); +} + static inline void file_end_write(struct file *file) { if (!S_ISREG(file_inode(file)->i_mode)) |