percpu_ref: replace pcpu_ prefix with percpu_
percpu_ref uses pcpu_ prefix for internal stuff and percpu_ for
externally visible ones. This is the same convention used in the
percpu allocator implementation. It works fine there but percpu_ref
doesn't have too much internal-only stuff and scattered usages of
pcpu_ prefix are confusing than helpful.
This patch replaces all pcpu_ prefixes with percpu_. This is pure
rename and there's no functional change. Note that PCPU_REF_DEAD is
renamed to __PERCPU_REF_DEAD to signify that the flag is internal.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Kent Overstreet <kmo@daterainc.com>
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h
index d44b027..3d463a3 100644
--- a/include/linux/percpu-refcount.h
+++ b/include/linux/percpu-refcount.h
@@ -13,7 +13,7 @@
*
* The refcount will have a range of 0 to ((1U << 31) - 1), i.e. one bit less
* than an atomic_t - this is because of the way shutdown works, see
- * percpu_ref_kill()/PCPU_COUNT_BIAS.
+ * percpu_ref_kill()/PERCPU_COUNT_BIAS.
*
* Before you call percpu_ref_kill(), percpu_ref_put() does not check for the
* refcount hitting 0 - it can't, if it was in percpu mode. percpu_ref_kill()
@@ -60,7 +60,7 @@
* The low bit of the pointer indicates whether the ref is in percpu
* mode; if set, then get/put will manipulate the atomic_t.
*/
- unsigned long pcpu_count_ptr;
+ unsigned long percpu_count_ptr;
percpu_ref_func_t *release;
percpu_ref_func_t *confirm_kill;
struct rcu_head rcu;
@@ -88,26 +88,26 @@
return percpu_ref_kill_and_confirm(ref, NULL);
}
-#define PCPU_REF_DEAD 1
+#define __PERCPU_REF_DEAD 1
/*
* Internal helper. Don't use outside percpu-refcount proper. The
* function doesn't return the pointer and let the caller test it for NULL
* because doing so forces the compiler to generate two conditional
- * branches as it can't assume that @ref->pcpu_count is not NULL.
+ * branches as it can't assume that @ref->percpu_count is not NULL.
*/
-static inline bool __pcpu_ref_alive(struct percpu_ref *ref,
- unsigned long __percpu **pcpu_countp)
+static inline bool __percpu_ref_alive(struct percpu_ref *ref,
+ unsigned long __percpu **percpu_countp)
{
- unsigned long pcpu_ptr = ACCESS_ONCE(ref->pcpu_count_ptr);
+ unsigned long percpu_ptr = ACCESS_ONCE(ref->percpu_count_ptr);
/* paired with smp_store_release() in percpu_ref_reinit() */
smp_read_barrier_depends();
- if (unlikely(pcpu_ptr & PCPU_REF_DEAD))
+ if (unlikely(percpu_ptr & __PERCPU_REF_DEAD))
return false;
- *pcpu_countp = (unsigned long __percpu *)pcpu_ptr;
+ *percpu_countp = (unsigned long __percpu *)percpu_ptr;
return true;
}
@@ -121,12 +121,12 @@
*/
static inline void percpu_ref_get(struct percpu_ref *ref)
{
- unsigned long __percpu *pcpu_count;
+ unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
- if (__pcpu_ref_alive(ref, &pcpu_count))
- this_cpu_inc(*pcpu_count);
+ if (__percpu_ref_alive(ref, &percpu_count))
+ this_cpu_inc(*percpu_count);
else
atomic_long_inc(&ref->count);
@@ -144,13 +144,13 @@
*/
static inline bool percpu_ref_tryget(struct percpu_ref *ref)
{
- unsigned long __percpu *pcpu_count;
+ unsigned long __percpu *percpu_count;
int ret;
rcu_read_lock_sched();
- if (__pcpu_ref_alive(ref, &pcpu_count)) {
- this_cpu_inc(*pcpu_count);
+ if (__percpu_ref_alive(ref, &percpu_count)) {
+ this_cpu_inc(*percpu_count);
ret = true;
} else {
ret = atomic_long_inc_not_zero(&ref->count);
@@ -178,13 +178,13 @@
*/
static inline bool percpu_ref_tryget_live(struct percpu_ref *ref)
{
- unsigned long __percpu *pcpu_count;
+ unsigned long __percpu *percpu_count;
int ret = false;
rcu_read_lock_sched();
- if (__pcpu_ref_alive(ref, &pcpu_count)) {
- this_cpu_inc(*pcpu_count);
+ if (__percpu_ref_alive(ref, &percpu_count)) {
+ this_cpu_inc(*percpu_count);
ret = true;
}
@@ -204,12 +204,12 @@
*/
static inline void percpu_ref_put(struct percpu_ref *ref)
{
- unsigned long __percpu *pcpu_count;
+ unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
- if (__pcpu_ref_alive(ref, &pcpu_count))
- this_cpu_dec(*pcpu_count);
+ if (__percpu_ref_alive(ref, &percpu_count))
+ this_cpu_dec(*percpu_count);
else if (unlikely(atomic_long_dec_and_test(&ref->count)))
ref->release(ref);
@@ -226,9 +226,9 @@
*/
static inline bool percpu_ref_is_zero(struct percpu_ref *ref)
{
- unsigned long __percpu *pcpu_count;
+ unsigned long __percpu *percpu_count;
- if (__pcpu_ref_alive(ref, &pcpu_count))
+ if (__percpu_ref_alive(ref, &percpu_count))
return false;
return !atomic_long_read(&ref->count);
}