[PATCH 3/4] exec: simplify the compat syscall handling

[Arnd Bergmann]

On Fri, Mar 26, 2021 at 3:38 PM Christoph Hellwig <hch at lst.de> wrote:
>
> The only differenence betweeen the compat exec* syscalls and their
> native versions is the compat_ptr sign extension, and the fact that
> the pointer arithmetics for the two dimensional arrays needs to use
> the compat pointer size.  Instead of the compat wrappers and the
> struct user_arg_ptr machinery just use in_compat_syscall() to do the
> right thing for the compat case deep inside get_user_arg_ptr().
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Nice cleanup!

Reviewed-by: Arnd Bergmann <arnd at arndb.de>