[PATCH] Add fs_subsys to enable filesystems to use sysfs

This creates an "fs" subdirectory in sysfs so that GFS2 (or any other
filesystem, come to that) can make use of sysfs.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index 8bc15b362d23..ce97becff461 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -48,6 +48,10 @@ static int hash_mask __read_mostly, hash_bits __read_mostly;
 static kmem_cache_t *mnt_cache;
 static struct rw_semaphore namespace_sem;
 
+/* /sys/fs */
+decl_subsys(fs, NULL, NULL);
+EXPORT_SYMBOL_GPL(fs_subsys);
+
 static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)
 {
         unsigned long tmp = ((unsigned long)mnt / L1_CACHE_BYTES);
@@ -1725,6 +1729,7 @@ void __init mnt_init(unsigned long mempages)
                 i--;
         } while (i);
         sysfs_init();
+        subsystem_register(&fs_subsys);
         init_rootfs();
         init_mount_tree();
 }