Re: [PATCH] Btrfs - use %pU to print fsid

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On Wed, Feb 9, 2011 at 8:05 AM, Ilya Dryomov <idryomov@xxxxxxxxx> wrote:
> Get rid of FIXME comment.  Uuids from dmesg are now the same as uuids
> given by btrfs-progs.
>
> Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
> ---
>  fs/btrfs/volumes.c |    8 ++------
>  1 files changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 2636a05..83b789c 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -714,12 +714,8 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
>        transid = btrfs_super_generation(disk_super);
>        if (disk_super->label[0])
>                printk(KERN_INFO "device label %s ", disk_super->label);
> -       else {
> -               /* FIXME, make a readl uuid parser */
> -               printk(KERN_INFO "device fsid %llx-%llx ",
> -                      *(unsigned long long *)disk_super->fsid,
> -                      *(unsigned long long *)(disk_super->fsid + 8));
> -       }
> +       else
> +               printk(KERN_INFO "device fsid %pU ", disk_super->fsid);
>        printk(KERN_CONT "devid %llu transid %llu %s\n",
>               (unsigned long long)devid, (unsigned long long)transid, path);
>        ret = device_list_add(path, disk_super, devid, fs_devices_ret);
> --
> 1.7.2.3
>

I've had this patch in my testing stack for a while now, and it's been
working well.  The fsid now matches the UUID.

It would be nice if the text string lead off with "Btrfs:" or
"btrfs:".  This would be similar to the way other drivers send log
messages, and would make it easier to pick out the Btrfs mount message
from all the other messages.
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