linux-kernel - Re: bit tweaks [was: Re: [nfsd4] potentially hardware breaking regression in 4.14-rc and 4.13.11]

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Message-ID: <CA+55aFyK9FER2Bsbs5nhqipznwjG_aGU7qSRbnqtZSf0Hx833A@mail.gmail.com>
Date:   Tue, 14 Nov 2017 16:02:26 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: bit tweaks [was: Re: [nfsd4] potentially hardware breaking
 regression in 4.14-rc and 4.13.11]

On Tue, Nov 14, 2017 at 3:53 PM, Rasmus Villemoes
<linux@...musvillemoes.dk> wrote:
>
> Odd. 7.2 and 7.1 (both of which I've just compiled from source, no
> special configure flags or anything) generate exactly the same (good)
> code for fs/namespace.o after patching. I also tried with
> CONFIG_CC_OPTIMIZE_FOR_SIZE=y just in case, but that still produces
> reasonable code. Oh well.

It might be configuration-dependent. I usually end up having a couple
of different configurations depending on what I'm doing, one being a
fairly minimal one, and one being the "allmodconfig" I use mainly for
build testing.

           Linus