From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 18 Nov 2022 11:09:02 +0000
Subject: Re: [PATCH mm-unstable v1 20/20] mm: rename FOLL_FORCE to FOLL_PTRACE
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To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Hildenbrand <david@redhat.com>, linux-kernel@vger.kernel.org, x86@kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kselftest@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>, Jason Gunthorpe <jgg@ziepe.ca>, John Hubbard <jhubbard@nvidia.com>, Peter Xu <peterx@redhat.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Andrea Arcangeli <aarcange@redhat.com>, Hugh Dickins <hughd@google.com>, Nadav Amit <namit@vmware.com>, Vlastimil Babka <vbabka@suse.cz>, Matthew Wilcox <willy@infradead.org>, Mike Kravetz <mike.kravetz@oracle.com>, Muchun Song <songmuchun@bytedance.com>, Shuah Khan <shuah@kernel.org>, Lucas Stach <l.stach@pengutronix.de>, David Airlie <airlied@gmail.com>, Oded Gabbay <ogabbay@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Christoph Hellwig <hch@infradead.org>, Alex Williamson <alex.williamson@redhat.com>, Oleg Nesterov <oleg@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Ivan Kokshaysky <ink@jurassic.park.msu.ru>, Matt Turner <mattst88@gmail.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>, Christophe Leroy <christophe.leroy@csgroup.eu>, "David S. Miller" <davem@davemloft.net>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>, "H. Peter Anvin" <hpa@zytor.com>, Richard Weinberger <richard@nod.at>, Anton Ivanov <anton.ivanov@cambridgegreys.com>, Johannes Berg <johannes@sipsolutions.net>, Eric Biederman <ebiederm@xmission.com>, Kees Cook <keescook@chromium.org>, Alexander Viro <viro@zeniv.linux.org.uk>, Arnaldo Carvalho de Melo <acme@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>, Kentaro Takeda <takedakn@nttdata.co.jp>, Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>, Paul Moore <paul@paul-moore.com>, James Morris <jmorris@namei.org>, "Serge E. Hallyn" <serge@hallyn.com>

On Wed, Nov 16, 2022 at 10:16:34AM -0800, Linus Torvalds wrote:
> Following the history of it is a big of a mess, because there's a
> number of renamings and re-organizations, but it seems to go back to
> 2007 and commit b6a2fea39318 ("mm: variable length argument support").

I went back and read parts of the discussions with Ollie, and the
.force=1 thing just magically appeared one day when we were sending
work-in-progress patches back and forth without mention of where it came
from :-/

And I certainly can't remember now..

Looking at it now, I have the same reaction as both you and Kees had, it
seems entirely superflous. So I'm all for trying to remove it.