Re: [PATCH v4 1/2] powerpc/uaccess: Implement unsafe_put_user() using 'asm goto'

Michael Ellerman
2020-05-29T04:24:29Z

On Fri, 2020-04-17 at 17:08:51 UTC, Christophe Leroy wrote:
> unsafe_put_user() is designed to take benefit of 'asm goto'.
>
> Instead of using the standard __put_user() approach and branch
> based on the returned error, use 'asm goto' and make the
> exception code branch directly to the error label. There is
> no code anymore in the fixup section.
>
> This change significantly simplifies functions using
> unsafe_put_user()
...
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>

Applied to powerpc topic/uaccess-ppc, thanks.

https://git.kernel.org/powerpc/c/334710b1496af8a0960e70121f850e209c20958f

cheers