commit f2fa2ffc2046fdc35f96366d1ec8675f4d578522
author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Sat Jan 29 18:43:40 2011 +0530
committer Al Viro <viro@zeniv.linux.org.uk> Tue Mar 15 02:21:45 2011 -0400
tree b1215682f5fbb99cf975cee3fb827909ee4a1c97
parent 03cb5f03dcb26846fcad345d8c15aae91579a53d

ext4: Copy fs UUID to superblock

File system UUID is made available to application
via  /proc/<pid>/mountinfo

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/ext4/super.c

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f6a318f..5977b35 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3415,6 +3415,8 @@
 	sb->s_qcop = &ext4_qctl_operations;
 	sb->dq_op = &ext4_quota_operations;
 #endif
+	memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));
+
 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
 	mutex_init(&sbi->s_orphan_lock);
 	mutex_init(&sbi->s_resize_lock);