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 <redacted>
Reviewed-by: Segher Boessenkool <redacted>

Applied to powerpc topic/uaccess-ppc, thanks.

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

cheers