linux-kernel - Re: [PATCH 01/27] smpboot: Provide a generic method to boot secondary processors

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Date:	Mon, 4 Jun 2012 10:18:40 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Tony Luck <tony.luck@...el.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Chris Metcalf <cmetcalf@...era.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Mike Frysinger <vapier@...too.org>,
	Hirokazu Takata <takata@...ux-m32r.org>,
	Richard Kuo <rkuo@...eaurora.org>,
	David Howells <dhowells@...hat.com>,
	Bob Liu <lliubbo@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Richard Weinberger <richard@....at>,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Russell King <linux@....linux.org.uk>,
	Matt Turner <mattst88@...il.com>, nikunj@...ux.vnet.ibm.com
Subject: Re: [PATCH 01/27] smpboot: Provide a generic method to boot
 secondary processors

On Sun, Jun 03, 2012 at 04:52:23PM +0530, Srivatsa S. Bhat wrote:
> In short, to avoid breaking build on x86.
> We wanted to follow the x86 convention of having static inline functions in
> arch/x86/include/asm/smp.h and use the smp_ops structure to route the calls
> to x86 or xen as appropriate (see patch 4 in this series).
> 
> But __weak definitions interfere with that and break the build. Hence, we
> followed what Linus suggested doing in a similar context:
> https://lkml.org/lkml/2008/7/26/187

Good to know that, thanks for your explanation.

Yong
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