Re: How getting a pointer on the per-cpu struct tss_struct??

From: Zwane Mwaikambo
Date: Sun Feb 12 2006 - 18:51:50 EST


On Mon, 13 Feb 2006, Marko wrote:

> But when I try to compile this, I get the warning:
>
> *** Warning: "per_cpu__init_tss" [/home/..../module.ko]
> undefined!
>
> and according to this warning an error, when I try to load the module:
>
> insmod: error inserting 'module.ko': -1 Unknown symbol in module

init_tss isn't exported, you would need to do
EXPORT_PER_CPU_SYMBOL(init_tss).

Also a suggestion, you should use __get_cpu_var instead of per_cpu e.g.

struct tss_struct *t;
/* if you don't need cpu variable just preempt_disable */
int cpu = get_cpu();
t = __get_cpu_var(init_tss);
...
put_cpu();
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