linux-kernel - Re: [PATCH 0/6] LLVMLinux: Patches to enable the kernel to be compiled with clang/LLVM

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Message-ID: <20140709095718.GD9485@arm.com>
Date:	Wed, 9 Jul 2014 10:57:18 +0100
From:	Will Deacon <will.deacon@....com>
To:	"behanw@...verseincode.com" <behanw@...verseincode.com>
Cc:	"anurag19aggarwal@...il.com" <anurag19aggarwal@...il.com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"charlebm@...il.com" <charlebm@...il.com>,
	"dave.long@...aro.org" <dave.long@...aro.org>,
	"k.khlebnikov@...sung.com" <k.khlebnikov@...sung.com>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"linyongting@...il.com" <linyongting@...il.com>,
	Nikolay Borisov <Nikolay.Borisov@....com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rabin@....in" <rabin@....in>,
	"rostedt@...dmis.org" <rostedt@...dmis.org>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>
Subject: Re: [PATCH 0/6] LLVMLinux: Patches to enable the kernel to be
 compiled with clang/LLVM

On Tue, Jul 08, 2014 at 09:16:10PM +0100, behanw@...verseincode.com wrote:
> From: Behan Webster <behanw@...verseincode.com>
> 
> The LLVMLinux project aims to fully build the Linux kernel using both gcc and
> clang (the C front end for the LLVM compiler infrastructure project). 
> 
> Clang only supports global named registers for non-allocatable registers like
> the stack pointer. By centralizing the definition of current_stack_pointer, the
> use of named registers for ARM remains largely unchanged while working for both
> gcc and clang.

All looks sane to me. For the series:

  Acked-by: Will Deacon <will.deacon@....com>

BTW, have you tried building an arm64 kernel with clang?

Will
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