fs/omfs: return f_fsid for statfs(2)

Make omfs return f_fsid info for statfs(2).
Signed-off-by: NColy Li <coly.li@suse.de>
Acked-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/omfs/inode.c

@@ -262,14 +262,19 @@ static int omfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct super_block *s = dentry->d_sb;
 	struct omfs_sb_info *sbi = OMFS_SB(s);
+	u64 id = huge_encode_dev(s->s_bdev->bd_dev);
+
 	buf->f_type = OMFS_MAGIC;
 	buf->f_bsize = sbi->s_blocksize;
 	buf->f_blocks = sbi->s_num_blocks;
 	buf->f_files = sbi->s_num_blocks;
 	buf->f_namelen = OMFS_NAMELEN;
+	buf->f_fsid.val[0] = (u32)id;
+	buf->f_fsid.val[1] = (u32)(id >> 32);
 
 	buf->f_bfree = buf->f_bavail = buf->f_ffree =
 		omfs_count_free(s);
+
 	return 0;
 }