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module: Replace module_ref with atomic_t refcnt

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Replace module_ref per-cpu complex reference counter with
an atomic_t simple refcnt. This is for code simplification.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Masami Hiramatsu 2014-11-10 09:29:29 +10:30 • committed by Rusty Russell
parent 0286b5ea12
commit 2f35c41f58
3 changed files with 7 additions and 50 deletions
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16
include/linux/module.h
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@ -210,20 +210,6 @@ enum module_state {
MODULE_STATE_UNFORMED, /* Still setting it up. */
};
/**
* struct module_ref - per cpu module reference counts
* @incs: number of module get on this cpu
* @decs: number of module put on this cpu
*
* We force an alignment on 8 or 16 bytes, so that alloc_percpu()
* put @incs/@decs in same cache line, with no extra memory cost,
* since alloc_percpu() is fine grained.
*/
struct module_ref {
unsigned long incs;
unsigned long decs;
} __attribute((aligned(2 * sizeof(unsigned long))));
struct module {
enum module_state state;
@ -367,7 +353,7 @@ struct module {
/* Destruction function. */
void (*exit)(void);
struct module_ref __percpu *refptr;
atomic_t refcnt;
#endif
#ifdef CONFIG_CONSTRUCTORS