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kernfs: move the last knowledge of sysfs out from kernfs

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There is still one residue of sysfs remaining: the sb_magic
SYSFS_MAGIC. However this should be kernfs user specific,
so this patch moves it out. Kerrnfs user should specify their
magic number while mouting.

Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jianyu Zhan 2014-04-26 15:40:28 +08:00 • committed by Greg Kroah-Hartman
parent 9f70a40128
commit 26fc9cd200
4 changed files with 20 additions and 12 deletions
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13
include/linux/kernfs.h
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@ -301,8 +301,8 @@ void kernfs_notify(struct kernfs_node *kn);
const void *kernfs_super_ns(struct super_block *sb);
struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags,
struct kernfs_root *root, bool *new_sb_created,
const void *ns);
struct kernfs_root *root, unsigned long magic,
bool *new_sb_created, const void *ns);
void kernfs_kill_sb(struct super_block *sb);
void kernfs_init(void);
@ -395,7 +395,8 @@ static inline const void *kernfs_super_ns(struct super_block *sb)
static inline struct dentry *
kernfs_mount_ns(struct file_system_type *fs_type, int flags,
struct kernfs_root *root, bool *new_sb_created, const void *ns)
struct kernfs_root *root, unsigned long magic,
bool *new_sb_created, const void *ns)
{ return ERR_PTR(-ENOSYS); }
static inline void kernfs_kill_sb(struct super_block *sb) { }
@ -453,9 +454,11 @@ static inline int kernfs_rename(struct kernfs_node *kn,
static inline struct dentry *
kernfs_mount(struct file_system_type *fs_type, int flags,
struct kernfs_root *root, bool *new_sb_created)
struct kernfs_root *root, unsigned long magic,
bool *new_sb_created)
{
return kernfs_mount_ns(fs_type, flags, root, new_sb_created, NULL);
return kernfs_mount_ns(fs_type, flags, root,
magic, new_sb_created, NULL);
}
#endif /* __LINUX_KERNFS_H */