linux-kernel - Re: [PATCH v3 04/23] arm64: Use in_compat_task() in arch_setup_additional

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Date:   Tue, 15 Jun 2021 11:21:40 +0100
From:   Will Deacon <will@...nel.org>
To:     Dmitry Safonov <dima@...sta.com>
Cc:     linux-kernel@...r.kernel.org,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Guo Ren <guoren@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincenzo Frascino <vincenzo.frascino@....com>, x86@...nel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 04/23] arm64: Use in_compat_task() in
 arch_setup_additional_pages()

On Fri, Jun 11, 2021 at 07:02:23PM +0100, Dmitry Safonov wrote:
> Instead of providing compat_arch_setup_additional_pages(), check if the
> task is compatible from personality, which is set earlier in
> load_elf_binary(). That will align code with powerpc and sparc, also
> it'll allow to completely remove compat_arch_setyp_addtional_pages()
> macro after doing the same for x86, simiplifying the binfmt code
> in the end and leaving elf loader single function.
> 
> Cc: linux-arm-kernel@...ts.infradead.org
> Signed-off-by: Dmitry Safonov <dima@...sta.com>
> ---
>  arch/arm64/include/asm/elf.h |  5 -----
>  arch/arm64/kernel/vdso.c     | 21 ++++++++++-----------
>  2 files changed, 10 insertions(+), 16 deletions(-)

Acked-by: Will Deacon <will@...nel.org>

Will