From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: [PATCH 21/22] tmpfs: generate random sb->s_uuid Date: Sun, 28 May 2017 13:20:07 +0300 Message-ID: <20170528102008.30276-22-hch@lst.de> References: <20170528102008.30276-1-hch@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20170528102008.30276-1-hch-jcswGhMUV9g@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-nvdimm-bounces-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org Sender: "Linux-nvdimm" To: Andy Shevchenko , Amir Goldstein , linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-raid-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Andrew Morton , linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org, Shaohua Li , Hugh Dickins , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, David Howells , linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mimi Zohar , Steven Whitehouse List-Id: linux-raid.ids From: Amir Goldstein This is used by overlayfs to encode intrasystem unique file handles. Suggested-by: Miklos Szeredi Cc: Hugh Dickins Cc: Andrew Morton Signed-off-by: Amir Goldstein Signed-off-by: Christoph Hellwig --- mm/shmem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/shmem.c b/mm/shmem.c index e67d6ba4e98e..391f2dcca727 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -75,6 +75,7 @@ static struct vfsmount *shm_mnt; #include #include #include +#include #include #include @@ -3761,6 +3762,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) #ifdef CONFIG_TMPFS_POSIX_ACL sb->s_flags |= MS_POSIXACL; #endif + uuid_gen(&sb->s_uuid); inode = shmem_get_inode(sb, NULL, S_IFDIR | sbinfo->mode, 0, VM_NORESERVE); if (!inode) -- 2.11.0