linux-kernel - Re: [PATCH v2 1/4] mm: Add optional close() to struct vm_special

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Message-ID: <87y14rso9o.fsf@mail.lhotse>
Date: Tue, 20 Aug 2024 16:26:43 +1000
From: Michael Ellerman <mpe@...erman.id.au>
To: Linus Torvalds <torvalds@...ux-foundation.org>, Nathan Chancellor
 <nathan@...nel.org>, Guo Ren <guoren@...nel.org>, Brian Cain
 <bcain@...cinc.com>, Dinh Nguyen <dinguyen@...nel.org>, Yoshinori Sato
 <ysato@...rs.sourceforge.jp>, Rich Felker <dalias@...c.org>, John Paul
 Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>, Richard Weinberger
 <richard@....at>, Anton Ivanov <anton.ivanov@...bridgegreys.com>, Johannes
 Berg <johannes@...solutions.net>
Cc: linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
 akpm@...ux-foundation.org, christophe.leroy@...roup.eu, jeffxu@...gle.com,
 Liam.Howlett@...cle.com, linux-kernel@...r.kernel.org, npiggin@...il.com,
 oliver.sang@...el.com, pedro.falcato@...il.com,
 linux-um@...ts.infradead.org, linux-csky@...r.kernel.org, linux-hexagon
 <linux-hexagon@...r.kernel.org>, Linux-sh list <linux-sh@...r.kernel.org>
Subject: Re: [PATCH v2 1/4] mm: Add optional close() to struct
 vm_special_mapping

Linus Torvalds <torvalds@...ux-foundation.org> writes:
> On Mon, 19 Aug 2024 at 13:15, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
>>
>> Ok, I did a quick hack-job to remove that disgusting
>> install_special_mapping() legacy case.
>>
>> With this [..]
>
> I forgot to actually attach that "this". Here it is. For real, this time.
>
>                    Linus
>  arch/csky/kernel/vdso.c            | 28 +++++++++++++++++++++-------
>  arch/hexagon/kernel/vdso.c         | 14 ++++++++++----
>  arch/nios2/mm/init.c               | 12 ++++++++----
>  arch/sh/kernel/vsyscall/vsyscall.c | 14 +++++++++++---
>  arch/x86/um/vdso/vma.c             | 12 ++++++++----
>  include/linux/mm.h                 |  4 ----
>  mm/mmap.c                          | 32 +++++---------------------------
>  7 files changed, 63 insertions(+), 53 deletions(-)
>
...
> index 1bd85a6949c4..5e68ab7a8898 100644
> --- a/arch/sh/kernel/vsyscall/vsyscall.c
> +++ b/arch/sh/kernel/vsyscall/vsyscall.c
> @@ -36,6 +36,10 @@ __setup("vdso=", vdso_setup);
>   */
>  extern const char vsyscall_trapa_start, vsyscall_trapa_end;
>  static struct page *syscall_pages[1];
> +static struct vm_special_mapping vdso_mapping = {
> +	.name = "[vdso]",
> +	.pages = syscall_pages;
                              ^
                              should be ,
> +};

cheers