diff options
| author | Li Zefan <lizefan@huawei.com> | 2014-06-30 11:50:28 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-17 16:23:19 -0700 |
| commit | f5fc1ec5e8d32bfb559a87800633b0a82a37e640 (patch) | |
| tree | 3e700541f5429e61c783e542e52143521011252d /include | |
| parent | 0b2332fbef1df5db5ed85fb1812aca9d50aa6415 (diff) | |
kernfs: introduce kernfs_pin_sb()
commit 4e26445faad366d67d7723622bf6a60a6f0f5993 upstream.
kernfs_pin_sb() tries to get a refcnt of the superblock.
This will be used by cgroupfs.
v2:
- make kernfs_pin_sb() return the superblock.
- drop kernfs_drop_sb().
tj: Updated the comment a bit.
[ This is a prerequisite for a bugfix. ]
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kernfs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index 17aa1cce6f8e..20f493564917 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -304,6 +304,7 @@ struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags, struct kernfs_root *root, unsigned long magic, bool *new_sb_created, const void *ns); void kernfs_kill_sb(struct super_block *sb); +struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns); void kernfs_init(void); |