fs/cramfs: return f_fsid for statfs(2)

Make cramfs return f_fsid info for statfs(2).

Signed-off-by: Coly Li <coly.li@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 46e52980b98a..dd3634e4c967 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -318,6 +318,7 @@ out:
 static int cramfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         struct super_block *sb = dentry->d_sb;
+        u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
         buf->f_type = CRAMFS_MAGIC;
         buf->f_bsize = PAGE_CACHE_SIZE;
@@ -326,6 +327,8 @@ static int cramfs_statfs(struct dentry *dentry, struct kstatfs *buf)
         buf->f_bavail = 0;
         buf->f_files = CRAMFS_SB(sb)->files;
         buf->f_ffree = 0;
+        buf->f_fsid.val[0] = (u32)id;
+        buf->f_fsid.val[1] = (u32)(id >> 32);
         buf->f_namelen = CRAMFS_MAXPATHLEN;
         return 0;
 }