Re: [RFC][PATCH] get rid of the use of set_fs() (by way of kernel_recvmsg()) in sunrpc

[Linus Torvalds]

On Wed, Jan 17, 2018 at 7:06 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
>
> Similar to the way put_cmsg() handles 32bit case on biarch
> targets, introduce a flag telling put_cmsg() to treat
> ->msg_control as kernel pointer, using memcpy instead of
> copy_to_user().  That allows to avoid the use of kernel_recvmsg()
> with its set_fs().

If this is the only case that kernel_recvmsg() exists for, then by all
means, that patch certainly looks like a good thing.

                 Linus