mm: bdi: expose the BDI object in sysfs for FUSE

Register FUSE's backing_dev_info under sysfs with the name "fuse-MAJOR:MINOR"

Make the fuse control filesystem use s_dev instead of a fuse specific ID.
This makes it easier to match directories under /sys/fs/fuse/connections/ with
directories under /sys/class/bdi, and with actual mounts.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 67aaf6ee38e..c0481e48d16 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -390,8 +390,8 @@ struct fuse_conn {
         /** Entry on the fuse_conn_list */
         struct list_head entry;
 
-        /** Unique ID */
-        u64 id;
+        /** Device ID from super block */
+        dev_t dev;
 
         /** Dentries in the control filesystem */
         struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES];