Re: [PATCH 8/9] mm: remove compat_process_vm_{readv,writev}

[Arnd Bergmann]

On Fri, Sep 18, 2020 at 2:45 PM Christoph Hellwig <hch@xxxxxx> wrote:
>
> Now that import_iovec handles compat iovecs, the native syscalls
> can be used for the compat case as well.
>
> diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c
> index a4840b9d50ad14..f2fe0a33bcfdd5 100644
> --- a/arch/x86/entry/syscall_x32.c
> +++ b/arch/x86/entry/syscall_x32.c
> @@ -17,6 +17,8 @@
>  #define __x32_sys_getsockopt   __x64_sys_getsockopt
>  #define __x32_sys_setsockopt   __x64_sys_setsockopt
>  #define __x32_sys_vmsplice     __x64_sys_vmsplice
> +#define __x32_sys_process_vm_readv     __x64_sys_process_vm_readv
> +#define __x32_sys_process_vm_writev    __x64_sys_process_vm_writev
>
>  #define __SYSCALL_64(nr, sym)
>

I forgot this hack existed, and just sent a patch with subject "x86: add
__X32_COND_SYSCALL() macro" instead.

If I understand this right, the macros above should no longer be needed
once my patch gets merged.

        Arnd