linux-kernel - Re: [PATCH 1/1] powerpc/jump_label: use HAVE_JUMP

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Date:	Thu, 21 Aug 2014 17:34:53 +1000
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Zhouyi Zhou <zhouzhouyi@...il.com>
Cc:	benh@...nel.crashing.org, paulus@...ba.org,
	paulmck@...ux.vnet.ibm.com, anton@...ba.org,
	aneesh.kumar@...ux.vnet.ibm.com, jk@...abs.org,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	jbaron@...mai.com, Zhouyi Zhou <yizhouzhou@....ac.cn>
Subject: Re: [PATCH 1/1] powerpc/jump_label: use HAVE_JUMP_LABEL?

On Thu, 2014-08-21 at 10:41 +0800, Zhouyi Zhou wrote:
> CONFIG_JUMP_LABEL doesn't ensure HAVE_JUMP_LABEL, if it
> is not the case use maintainers's own mutex to guard
> the modification of global values.
 
OK, so CONFIG_JUMP_LABEL says the user wants to use jump labels. But we also
need the toolchain to support it.

That is reflected in CC_HAVE_ASM_GOTO=y, and if both are set then
HAVE_JUMP_LABEL is set to true.

So this looks right to me.

cheers


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