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authorTejun Heo <tj@kernel.org>2014-09-24 13:31:48 -0400
committerTejun Heo <tj@kernel.org>2014-09-24 13:31:48 -0400
commita2237370194484ee6aeeff04b617e4b14d178966 (patch)
tree6870066f892b8ddacb6a899f52e832abd0a92d69 /lib
parent9eca80461a45177e456219a9cd944c27675d6512 (diff)
downloadop-kernel-dev-a2237370194484ee6aeeff04b617e4b14d178966.zip
op-kernel-dev-a2237370194484ee6aeeff04b617e4b14d178966.tar.gz
percpu_ref: relocate percpu_ref_reinit()
percpu_ref is gonna go through restructuring. Move percpu_ref_reinit() after percpu_ref_kill_and_confirm(). This will make later changes easier to follow and result in cleaner organization. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/percpu-refcount.c70
1 files changed, 35 insertions, 35 deletions
diff --git a/lib/percpu-refcount.c b/lib/percpu-refcount.c
index 559ee0b..070dab5 100644
--- a/lib/percpu-refcount.c
+++ b/lib/percpu-refcount.c
@@ -63,41 +63,6 @@ int percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release,
EXPORT_SYMBOL_GPL(percpu_ref_init);
/**
- * percpu_ref_reinit - re-initialize a percpu refcount
- * @ref: perpcu_ref to re-initialize
- *
- * Re-initialize @ref so that it's in the same state as when it finished
- * percpu_ref_init(). @ref must have been initialized successfully, killed
- * and reached 0 but not exited.
- *
- * Note that percpu_ref_tryget[_live]() are safe to perform on @ref while
- * this function is in progress.
- */
-void percpu_ref_reinit(struct percpu_ref *ref)
-{
- unsigned long __percpu *pcpu_count = pcpu_count_ptr(ref);
- int cpu;
-
- BUG_ON(!pcpu_count);
- WARN_ON(!percpu_ref_is_zero(ref));
-
- atomic_long_set(&ref->count, 1 + PCPU_COUNT_BIAS);
-
- /*
- * Restore per-cpu operation. smp_store_release() is paired with
- * smp_read_barrier_depends() in __pcpu_ref_alive() and guarantees
- * that the zeroing is visible to all percpu accesses which can see
- * the following PCPU_REF_DEAD clearing.
- */
- for_each_possible_cpu(cpu)
- *per_cpu_ptr(pcpu_count, cpu) = 0;
-
- smp_store_release(&ref->pcpu_count_ptr,
- ref->pcpu_count_ptr & ~PCPU_REF_DEAD);
-}
-EXPORT_SYMBOL_GPL(percpu_ref_reinit);
-
-/**
* percpu_ref_exit - undo percpu_ref_init()
* @ref: percpu_ref to exit
*
@@ -189,3 +154,38 @@ void percpu_ref_kill_and_confirm(struct percpu_ref *ref,
call_rcu_sched(&ref->rcu, percpu_ref_kill_rcu);
}
EXPORT_SYMBOL_GPL(percpu_ref_kill_and_confirm);
+
+/**
+ * percpu_ref_reinit - re-initialize a percpu refcount
+ * @ref: perpcu_ref to re-initialize
+ *
+ * Re-initialize @ref so that it's in the same state as when it finished
+ * percpu_ref_init(). @ref must have been initialized successfully, killed
+ * and reached 0 but not exited.
+ *
+ * Note that percpu_ref_tryget[_live]() are safe to perform on @ref while
+ * this function is in progress.
+ */
+void percpu_ref_reinit(struct percpu_ref *ref)
+{
+ unsigned long __percpu *pcpu_count = pcpu_count_ptr(ref);
+ int cpu;
+
+ BUG_ON(!pcpu_count);
+ WARN_ON(!percpu_ref_is_zero(ref));
+
+ atomic_long_set(&ref->count, 1 + PCPU_COUNT_BIAS);
+
+ /*
+ * Restore per-cpu operation. smp_store_release() is paired with
+ * smp_read_barrier_depends() in __pcpu_ref_alive() and guarantees
+ * that the zeroing is visible to all percpu accesses which can see
+ * the following PCPU_REF_DEAD clearing.
+ */
+ for_each_possible_cpu(cpu)
+ *per_cpu_ptr(pcpu_count, cpu) = 0;
+
+ smp_store_release(&ref->pcpu_count_ptr,
+ ref->pcpu_count_ptr & ~PCPU_REF_DEAD);
+}
+EXPORT_SYMBOL_GPL(percpu_ref_reinit);
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