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Commit ac899061 authored by Tejun Heo's avatar Tejun Heo
Browse files

percpu-refcount: cosmetic updates 



* s/percpu_ref_release/percpu_ref_func_t/ as it's customary to have _t
  postfix for types and the type is gonna be used for a different type
  of callback too.

* Add @ARG to function comments.

* Drop unnecessary and unaligned indentation from percpu_ref_init()
  function comment.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarKent Overstreet <koverstreet@google.com>
parent 6a24474d

include/linux/percpu-refcount.h

+5 −3
Original line number Diff line number Diff line
@@ -51,7 +51,7 @@ 
#include <linux/rcupdate.h>



struct percpu_ref;

typedef void (percpu_ref_release)(struct percpu_ref *);

typedef void (percpu_ref_func_t)(struct percpu_ref *);



struct percpu_ref {

	atomic_t		count;
@@ -62,11 +62,11 @@ struct percpu_ref { 
	 * percpu_ref_kill_rcu())

	 */

	unsigned __percpu	*pcpu_count;

	percpu_ref_release	*release;

	percpu_ref_func_t	*release;

	struct rcu_head		rcu;

};



int percpu_ref_init(struct percpu_ref *, percpu_ref_release *);

int percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release);

void percpu_ref_kill(struct percpu_ref *ref);



#define PCPU_STATUS_BITS	2
@@ -78,6 +78,7 @@ void percpu_ref_kill(struct percpu_ref *ref); 


/**

 * percpu_ref_get - increment a percpu refcount

 * @ref: percpu_ref to get

 *

 * Analagous to atomic_inc().

  */
@@ -99,6 +100,7 @@ static inline void percpu_ref_get(struct percpu_ref *ref) 


/**

 * percpu_ref_put - decrement a percpu refcount

 * @ref: percpu_ref to put

 *

 * Decrement the refcount, and if 0, call the release function (which was passed

 * to percpu_ref_init())

lib/percpu-refcount.c

+4 −3
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ 


/**

 * percpu_ref_init - initialize a percpu refcount

 * @ref:	ref to initialize

 * @ref: percpu_ref to initialize

 * @release: function which will be called when refcount hits 0

 *

 * Initializes the refcount in single atomic counter mode with a refcount of 1;
@@ -42,7 +42,7 @@ 
 * Note that @release must not sleep - it may potentially be called from RCU

 * callback context by percpu_ref_kill().

 */

int percpu_ref_init(struct percpu_ref *ref, percpu_ref_release *release)

int percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release)

{

	atomic_set(&ref->count, 1 + PCPU_COUNT_BIAS);
@@ -98,6 +98,7 @@ static void percpu_ref_kill_rcu(struct rcu_head *rcu) 


/**

 * percpu_ref_kill - safely drop initial ref

 * @ref: percpu_ref to kill

 *

 * Must be used to drop the initial ref on a percpu refcount; must be called

 * precisely once before shutdown.