Re: [PATCH v3 2/2] vdso: Introduce vdso/page.h

[Geert Uytterhoeven]

On Thu, Oct 3, 2024 at 5:30 PM Vincenzo Frascino
<vincenzo.frascino@xxxxxxx> wrote:
> The VDSO implementation includes headers from outside of the
> vdso/ namespace.
>
> Introduce vdso/page.h to make sure that the generic library
> uses only the allowed namespace.
>
> Note: on a 32-bit architecture UL is an unsigned 32 bit long. Hence when
> it supports 64-bit phys_addr_t we might end up in situation in which the
> top 32 bit are cleared. To prevent this issue this patch provides
> separate macros for PAGE_MASK.
>
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Andy Lutomirski <luto@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Jason A. Donenfeld <Jason@xxxxxxxxx>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>

Thanks for your patch!

>  arch/m68k/include/asm/page.h       |  6 ++----

Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> # m68k

> --- /dev/null
> +++ b/include/vdso/page.h
> @@ -0,0 +1,23 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef __VDSO_PAGE_H
> +#define __VDSO_PAGE_H
> +
> +#include <uapi/linux/const.h>
> +
> +/*
> + * PAGE_SHIFT determines the page size.
> + *
> + * Note: This definition is required because PAGE_SHIFT is used
> + * in several places throuout the codebase.

throughout

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds