[patch V2 1/6] ARM: uaccess: Implement missing __get_user_asm_dword()

[Nathan Chancellor]

On Wed, Sep 17, 2025 at 04:17:38PM +0100, Russell King (Oracle) wrote:
> For me, this produces:
> 
> get-user-test.c:41:16: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
>    41 |         (x) = *(__force __typeof__(*(ptr)) *) &__gu_val;                \
>       |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> with arm-linux-gnueabihf-gcc (Debian 14.2.0-19) 14.2.0
> 
> Maybe you're using a different compiler that doesn't issue that warning?

Maybe because the kernel uses -fno-strict-aliasing, which presumably
turns off -Wstrict-aliasing?

Cheers,
Nathan