diff options
| author | Tejun Heo | 2015-08-18 23:54:55 +0200 |
|---|---|---|
| committer | Jens Axboe | 2015-08-19 00:49:15 +0200 |
| commit | 9acee9c551f045d2c5b5261aa587331423fd7d92 (patch) | |
| tree | 16f0ecafd4f842d6352dd85913283a262a8e56f0 /include/linux/kernfs.h | |
| parent | writeback: explain why @inode is allowed to be NULL for inode_congested() (diff) | |
| download | kernel-qcow2-linux-9acee9c551f045d2c5b5261aa587331423fd7d92.tar.gz kernel-qcow2-linux-9acee9c551f045d2c5b5261aa587331423fd7d92.tar.xz kernel-qcow2-linux-9acee9c551f045d2c5b5261aa587331423fd7d92.zip | |
kernfs: implement kernfs_path_len()
Add a function to determine the path length of a kernfs node. This
for now will be used by writeback tracepoint updates.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/kernfs.h')
| -rw-r--r-- | include/linux/kernfs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index 123be25ea15a..5d4e9c4b821d 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -266,6 +266,7 @@ static inline bool kernfs_ns_enabled(struct kernfs_node *kn) } int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen); +size_t kernfs_path_len(struct kernfs_node *kn); char * __must_check kernfs_path(struct kernfs_node *kn, char *buf, size_t buflen); void pr_cont_kernfs_name(struct kernfs_node *kn); @@ -332,6 +333,9 @@ static inline bool kernfs_ns_enabled(struct kernfs_node *kn) static inline int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen) { return -ENOSYS; } +static inline size_t kernfs_path_len(struct kernfs_node *kn) +{ return 0; } + static inline char * __must_check kernfs_path(struct kernfs_node *kn, char *buf, size_t buflen) { return NULL; } |