Le 08/05/2021 à 11:43, Arnd Bergmann a écrit :
On Sat, May 8, 2021 at 8:46 AM Christophe Leroy
<christophe.le...@csgroup.eu> wrote:
Something is going wrong with asm goto output. I implemented get_user() helpers
with asm goto this
cycle (commit 5cd29b1fd3e8). I tested it with CLANG before submitting, it was
working.
BTW, can you point me to those patches? I think it would be nice if we
could eventually
converge parts of get_user()/put_user() implementation on something
that works for all
architectures, we do seem to rewrite these way too often. Ideally we'd
have something
in asm-generic that provides all the wrappers, and just requires an
architecture to
implement the inline asm helpers for each of the sizes.
The series that is merged for 5.13 is here:
https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=233250&state=*
And of course the result is just
https://github.com/linuxppc/linux/blob/master/arch/powerpc/include/asm/uaccess.h
and all its history at
https://github.com/linuxppc/linux/commits/master/arch/powerpc/include/asm/uaccess.h
The fix from today here:
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/cf0a050d124d4f426cdc7a74009d17b01d8d8969.1620465917.git.christophe.le...@csgroup.eu/
I made a try to use asm-generic/uaccess.h a few weeks ago, but it was not conclusive. I can't
remember the details, but I can have a new look at it next week if you are interested with the details.
Christophe
