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From: Pranith Kumar <bobby.prani@gmail.com>
Date: Tue, 30 Dec 2014 13:54:07 -0500
Message-ID: <CAJhHMCDsxOsBKphPrH8N5ymPgdN_OVSujQWQt5CB52TK2PO9cA@mail.gmail.com>
Subject: Re: [PATCH v2] srcu: Isolate srcu sections using CONFIG_SRCU
To: Peter Zijlstra <peterz@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
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        Lai Jiangshan <laijs@cn.fujitsu.com>,
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        Josh Triplett <josh@joshtriplett.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        Scott Wood <scottwood@freescale.com>,
        Anton Blanchard <anton@samba.org>, Daniel Walter <dwalter@google.com>,
        Tiejun Chen <tiejun.chen@windriver.com>,
        Nishanth Aravamudan <nacc@linux.vnet.ibm.com>,
        Ingo Molnar <mingo@kernel.org>,
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        Vincent Guittot <vincent.guittot@linaro.org>,
        Li Zhong <zhong@linux.vnet.ibm.com>,
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Sender: linux-kernel-owner@vger.kernel.org

On Tue, Dec 30, 2014 at 1:50 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Tue, Dec 30, 2014 at 12:46:22AM -0500, Pranith Kumar wrote:
>> Isolate the SRCU functions and data structures within CONFIG_SRCU so that there
>> is a compile time failure if srcu is used when not enabled. This was decided to
>> be better than waiting until link time for a failure to occur.
>
> Why?

This is part of the kernel tinification efforts. The first patch was
posted here: https://lkml.org/lkml/2014/12/4/848. This patch enables a
compile time failure instead of a link time failure.

Thanks!
-- 
Pranith
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