From mboxrd@z Thu Jan  1 00:00:00 1970
From: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: PROPOSAL: Extend inline asm syntax with size spec
Date: Wed, 31 Oct 2018 11:31:16 -0500
Message-ID: <20181031163115.GG5994@gate.crashing.org>
References: <alpine.LSU.2.20.1810081105350.16707@zhemvz.fhfr.qr> <20181009145330.GT29268@gate.crashing.org> <alpine.LSU.2.20.1810100909140.16707@zhemvz.fhfr.qr> <20181010072240.GB103159@gmail.com> <20181010080324.GV29268@gate.crashing.org> <20181010081906.GA5533@zn.tnic> <20181010185432.GB29268@gate.crashing.org> <20181010191427.GF5533@zn.tnic> <20181013193335.GD31650@zn.tnic> <20181031125526.GA13219@hirez.programming.kicks-ass.net>
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To: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>, Richard Biener <rguenther@suse.de>, Michael Matz <matz@suse.de>, gcc@gcc.gnu.org, Nadav Amit <namit@vmware.com>, Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org, x86@kernel.org, Masahiro Yamada <yamada.masahiro@socionext.com>, Sam Ravnborg <sam@ravnborg.org>, Alok Kataria <akataria@vmware.com>, Christopher Li <sparse@chrisli.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "H. Peter Anvin" <hpa@zytor.com>, Jan Beulich <JBeulich@suse.com>, Josh Poimboeuf <jpoimboe@redhat.com>, Juergen Gross <jgross@suse.com>, Kate Stewart <kstewart@linuxfoundation.org>, Kees Cook <keescook@chromium.org>, linux-sparse@vger.kernel.org, Phili ppe Ombredanne <pombredanne@nexb.com>, Thomas Gleixner <tglx@linutronix.de>, virtual
List-Id: linux-sparse@vger.kernel.org

On Wed, Oct 31, 2018 at 01:55:26PM +0100, Peter Zijlstra wrote:
> Anyway, with the below patch, I get:
> 
>    text    data     bss     dec     hex filename
> 17385183        5064780 1953892 24403855        1745f8f defconfig-build/vmlinux
> 17385678        5064780 1953892 24404350        174617e defconfig-build/vmlinux
> 
> Which shows we inline more (look for asm_volatile for the actual
> changes).
> 
> 
> So yes, this seems like something we could work with.

Great to hear.  Note that with my latest patches
(see https://gcc.gnu.org/ml/gcc-patches/2018-10/msg01931.html ) there
is no required order "asm volatile inline" anymore, so you can just say
"asm inline volatile".  (And similar for "goto" as well).


Segher