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module: encapsulate percpu handling better and record percpu_size

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Better encapsulate module static percpu area handling so that code
outsidef of CONFIG_SMP ifdef doesn't deal with mod->percpu directly
and add mod->percpu_size and record percpu_size in it.  Both percpu
fields are compiled out on UP.  While at it, mark mod->percpu w/
__percpu.

This is to prepare for is_module_percpu_address().

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Tejun Heo 2010-03-10 18:56:10 +09:00
parent b72c40949b
commit 259354deaa
2 changed files with 39 additions and 32 deletions
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5
include/linux/module.h
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@ -330,8 +330,11 @@ struct module
struct module_notes_attrs *notes_attrs;
#endif
#ifdef CONFIG_SMP
/* Per-cpu data. */
void *percpu;
void __percpu *percpu;
unsigned int percpu_size;
#endif
/* The command line arguments (may be mangled). People like
keeping pointers to this stuff */