Re: initialization of static per-cpu variables

From: Rusty Russell
Date: Thu May 22 2008 - 04:20:44 EST

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

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