From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Sat, 29 Jan 2011 13:13:40 +0000 (+0530)
Subject: ext4: Copy fs UUID to superblock
X-Git-Tag: v3.12-rc1~6971^2~11
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f2fa2ffc2046fdc35f96366d1ec8675f4d578522;p=kernel%2Fkernel-generic.git

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>
---

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 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	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);