Re: [PATCH 2/2] ipc: fix sparc64 ipc() wrapper

[Matt Turner]

On Thu, Sep 5, 2019 at 8:23 AM Arnd Bergmann <arnd@xxxxxxxx> wrote:
>
> Matt bisected a sparc64 specific issue with semctl, shmctl and msgctl
> to a commit from my y2038 series in linux-5.1, as I missed the custom
> sys_ipc() wrapper that sparc64 uses in place of the generic version that
> I patched.
>
> The problem is that the sys_{sem,shm,msg}ctl() functions in the kernel
> now do not allow being called with the IPC_64 flag any more, resulting
> in a -EINVAL error when they don't recognize the command.
>
> Instead, the correct way to do this now is to call the internal
> ksys_old_{sem,shm,msg}ctl() functions to select the API version.
>
> As we generally move towards these functions anyway, change all of
> sparc_ipc() to consistently use those in place of the sys_*() versions,
> and move the required ksys_*() declarations into linux/syscalls.h
>
> Reported-by: Matt Turner <mattst88@xxxxxxxxx>
> Fixes: 275f22148e87 ("ipc: rename old-style shmctl/semctl/msgctl syscalls")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> Hi Matt,
>
> Can you check that this solves your problem?

Works great. Thank you Arnd!

Tested-by: Matt Turner <mattst88@xxxxxxxxx>