fs/hpfs: return f_fsid for statfs(2)

Make hpfs return f_fsid info for statfs(2).

Signed-off-by: Coly Li <coly.li@suse.de>
Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/hpfs/super.c

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 0d049b8..c40f6e2 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -136,6 +136,7 @@
 {
 	struct super_block *s = dentry->d_sb;
 	struct hpfs_sb_info *sbi = hpfs_sb(s);
+	u64 id = huge_encode_dev(s->s_bdev->bd_dev);
 	lock_kernel();
 
 	/*if (sbi->sb_n_free == -1) {*/
@@ -149,6 +150,8 @@
 	buf->f_bavail = sbi->sb_n_free;
 	buf->f_files = sbi->sb_dirband_size / 4;
 	buf->f_ffree = sbi->sb_n_free_dnodes;
+	buf->f_fsid.val[0] = (u32)id;
+	buf->f_fsid.val[1] = (u32)(id >> 32);
 	buf->f_namelen = 254;
 
 	unlock_kernel();