Re: [PATCH v1 1/1] sysctl: introduce uuid_le and uuid_be
From: Andrew Morton
Date: Tue May 24 2016 - 16:15:15 EST
On Tue, 24 May 2016 20:27:27 +0300 Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> By default the sysctl interface returns random UUID in big endian format.
> Sometimes it's not suitable, e.g. using generated UUID for EFI variable name.
> Provide uuid_le and uuid_be to comprehence that interface.
> drivers/char/random.c | 44 +++++++++++++++++++++++++++++++++++++++++
> include/uapi/linux/sysctl.h | 4 +++-
> kernel/sysctl_binary.c | 48 ++++++++++++++++++++++++++++++++++++++++++++
Why does the kernel need to do this? If userspace wants a random uuid
then it can grab a random number and cook up the UUID itself.