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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>,
	akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
	mm-commits@vger.kernel.org, masahiroy@kernel.org,
	keescook@chromium.org, gregkh@linuxfoundation.org,
	andriy.shevchenko@linux.intel.com,
	Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: [PATCH -mm] -funsigned-char, x86: make struct p4_event_bind::cntr signed array
Date: Thu, 20 Oct 2022 11:33:39 -0600	[thread overview]
Message-ID: <CAHmME9qBZqTd0D_gr8nE+DUzCrC0fxZNZK=7u+21jbgtFgAJBg@mail.gmail.com> (raw)
In-Reply-To: <CAHk-=whFow9Wd6C8htoRUt5wXbwf1i_qbuArBbhXOPqYsTFvtw@mail.gmail.com>

Hi Linus,

On Thu, Oct 20, 2022 at 11:15 AM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> Can we please try to collect these all in one place?
>
> I see that Andrew picked up the original one for -mm, but I think it
> would be better if we had one specific place for all of this (one
> branch) to collect it all.

Sure. Andrew can drop it from -mm, and I'll collect everything in:

https://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/linux.git/log/?h=unsigned-char&r

And I'll ask Stephen to add that branch to -next.

> I'm actually trying to do a "make allyesconfig" build on x86-64 with
> both signed and unsigned char, and trying to see if I can script
> something sane to show differences.
>
> Doing the build is easy, but the differences end up being huge just
> due to silly constants (ie the whole "one small difference ends up
> changing layout, which then causes hundreds of megs of diff just due
> to hex constants in the disassembly changing".

If you can get a copy of IDA Pro, diaphora is quite nice:
https://github.com/joxeankoret/diaphora

Or sometimes with objdump, I've had more success by keeping debug
symbols, and then trimming offsets from jmps.

Jason

  reply	other threads:[~2022-10-20 17:34 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-20  0:03 + kbuild-treat-char-as-always-unsigned.patch added to mm-nonmm-unstable branch Andrew Morton
2022-10-20  9:43 ` Alexey Dobriyan
2022-10-20  9:49 ` [PATCH -mm] -funsigned-char, x86: make struct p4_event_bind::cntr signed array Alexey Dobriyan
2022-10-20  9:56   ` [PATCH -mm] -funsigned-char, namei: delete cast in lookup_one_common() Alexey Dobriyan
2022-10-20 16:28   ` [PATCH -mm] -funsigned-char, x86: make struct p4_event_bind::cntr signed array Jason A. Donenfeld
2022-10-20 17:14     ` Linus Torvalds
2022-10-20 17:33       ` Jason A. Donenfeld [this message]
2022-10-20 17:42         ` Linus Torvalds
2022-10-20 18:57           ` Kees Cook
2022-10-20 19:39             ` Linus Torvalds
2022-10-20 20:17               ` Linus Torvalds
2022-10-20 21:34                 ` Andy Shevchenko
2022-10-20 22:46                   ` Jason A. Donenfeld
2022-10-21  6:48                 ` Greg KH
2022-10-21  7:24                   ` Jason A. Donenfeld
2022-10-21  7:36                     ` Greg KH
2022-10-26  1:50             ` Jason A. Donenfeld
2022-10-26 12:58               ` Jason A. Donenfeld
2022-10-26 12:58                 ` [cocci] " Jason A. Donenfeld
2022-10-26 13:17                 ` Andy Shevchenko
2022-10-26 13:17                   ` [cocci] " Andy Shevchenko
2022-11-02 17:17                 ` Julia Lawall
2022-11-03  0:08                   ` Jason A. Donenfeld
2022-11-03  6:31                     ` Julia Lawall
2022-11-03 12:45                     ` Julia Lawall
2022-11-03 12:47                       ` Jason A. Donenfeld
2022-11-03 12:57                         ` Julia Lawall
2022-11-03 14:07                           ` Jason A. Donenfeld
2022-10-24 15:44         ` Jason A. Donenfeld
2022-10-21  5:59       ` Alexey Dobriyan
2022-10-21 17:11         ` Linus Torvalds
2022-10-21 17:23           ` Linus Torvalds
2022-10-20 16:24 ` + kbuild-treat-char-as-always-unsigned.patch added to mm-nonmm-unstable branch Jason A. Donenfeld
2022-10-20 21:12   ` Andrew Morton
2022-10-20 21:13     ` Jason A. Donenfeld

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