linux-kernel - Re: initialization of static per-cpu variables

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Message-Id: <20080522.091254.39363717.davem@davemloft.net>
Date:	Thu, 22 May 2008 09:12:54 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	rusty@...tcorp.com.au
Cc:	vegard.nossum@...il.com, linux-kernel@...r.kernel.org
Subject: Re: initialization of static per-cpu variables

From: Rusty Russell <rusty@...tcorp.com.au>
Date: Thu, 22 May 2008 18:20:06 +1000

> On Thursday 22 May 2008 04:28:02 Vegard Nossum wrote:
> > Hi,
> >
> > I encountered this comment in kernel/softirq.c:
> >
> > /* Some compilers disobey section attribute on statics when not
> >    initialized -- RR */
> > static DEFINE_PER_CPU(struct tasklet_head, tasklet_vec) = { NULL };
> > static DEFINE_PER_CPU(struct tasklet_head, tasklet_hi_vec) = { NULL };
> >
> > So I assume it's the combination of static and whatever section
> > DFINE_PER_CPU puts the variable in which is the problem.
> >
> > However, there's a LOT of these "static DEFINE_PER_CPU" without any
> > initializer in the rest of the code, e.g.:
> 
> Yep, it was an old toolchain used by Sparc: DaveM found this one.  As you say, 
> it's ancient: I'm happy to queue a cleanup patch now everyone is on a modern 
> compiler.

Yes, that workaround certainly can die now.
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