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[209.85.219.178]) by smtp.gmail.com with ESMTPSA id 00721157ae682-6eace8d523esm30168127b3.22.2024.11.13.02.27.22 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 13 Nov 2024 02:27:22 -0800 (PST) Received: by mail-yb1-f178.google.com with SMTP id 3f1490d57ef6-e35e0ad7be5so1776195276.3 for ; Wed, 13 Nov 2024 02:27:22 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCXHuZK0gLLb7OddHCxTQuSiKWWfrbhIjPm/zcRFloyof+aVwrt66B7TC6SYodM05MjjNv0eDak5+w==@kvack.org X-Received: by 2002:a05:690c:3681:b0:6e3:da91:3e16 with SMTP id 00721157ae682-6eadddb0e10mr208300817b3.22.1731493641988; Wed, 13 Nov 2024 02:27:21 -0800 (PST) MIME-Version: 1.0 References: <8bbfe73f7f1ef9f1a4674d963d1c4e8181f33341.camel@sipsolutions.net> In-Reply-To: From: Geert Uytterhoeven Date: Wed, 13 Nov 2024 11:27:08 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [RFC PATCH v2 02/13] x86/um: nommu: elf loader for fdpic To: Johannes Berg Cc: Hajime Tazaki , linux-um@lists.infradead.org, ricarkol@google.com, Liam.Howlett@oracle.com, ebiederm@xmission.com, kees@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 7F19FC0008 X-Stat-Signature: 1tohyiaz9b75mypjcjpxjapn7h3514bu X-HE-Tag: 1731493603-49484 X-HE-Meta: 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 0j+3cgRp 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Johannes, On Wed, Nov 13, 2024 at 9:37=E2=80=AFAM Johannes Berg wrote: > On Wed, 2024-11-13 at 09:36 +0100, Johannes Berg wrote: > > On Wed, 2024-11-13 at 09:19 +0100, Geert Uytterhoeven wrote: > > > > > > > > > - depends on ARM || ((M68K || RISCV || SUPERH || XTENSA) = && !MMU) > > > > > > + depends on ARM || ((M68K || RISCV || SUPERH || UML || X= TENSA) && !MMU) > > > > > > > > > > s/UML/X86/? > > > > > > > > I guess the fdpic loader can be used to X86, but this patchset only > > > > adds UML to be able to select it. I intended to add UML into nommu > > > > family. > > > > > > While currently x86-nommu is supported for UML only, this is really > > > x86-specific. I still hope UML will get support for other architectur= es > > > one day, at which point a dependency on UML here will become wrong... > > > > > > > X86 isn't set for UML, X64_32 and X64_64 are though. > > > > Given that the no-MMU UM support even is 64-bit only, that probably > > should then really be (UML && X86_64). > > > > But it already has !MMU, so can't be selected otherwise, and it seems > > that non-X86 UML > > ... would require far more changes in all kinds of places, so not sure > I'd be too concerned about it here. OK, up to you... Gr{oetje,eeting}s, Geert --=20 Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k= .org In personal conversations with technical people, I call myself a hacker. Bu= t when I'm talking to journalists I just say "programmer" or something like t= hat. -- Linus Torvalds