[LIB]: Drop the pcounter itself.

The knock-out. The pcounter abstraction is not used any longer in the
kernel.

Not sure whether this should go via netdev tree, but as far as I
remember it was added via this one, and besides Eric thinks that
Andrew shouldn't mind this.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/pcounter.h b/include/linux/pcounter.h
deleted file mode 100644 (file)
index a82d9f2..0000000
--- a/include/linux/pcounter.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#ifndef __LINUX_PCOUNTER_H
-#define __LINUX_PCOUNTER_H
-/*
- * Using a dynamic percpu 'int' variable has a cost :
- * 1) Extra dereference
- * Current per_cpu_ptr() implementation uses an array per 'percpu variable'.
- * 2) memory cost of NR_CPUS*(32+sizeof(void *)) instead of num_possible_cpus()*4
- *
- * This pcounter implementation is an abstraction to be able to use
- * either a static or a dynamic per cpu variable.
- * One dynamic per cpu variable gets a fast & cheap implementation, we can
- * change pcounter implementation too.
- */
-struct pcounter {
-#ifdef CONFIG_SMP
-       void            (*add)(struct pcounter *self, int inc);
-       int             (*getval)(const struct pcounter *self, int cpu);
-       int             *per_cpu_values;
-#else
-       int             val;
-#endif
-};
-
-#ifdef CONFIG_SMP
-#include <linux/percpu.h>
-
-#define DEFINE_PCOUNTER(NAME)                                          \
-static DEFINE_PER_CPU(int, NAME##_pcounter_values);                    \
-static void NAME##_pcounter_add(struct pcounter *self, int val)                \
-{                                                                      \
-       __get_cpu_var(NAME##_pcounter_values) += val;                   \
-}                                                                      \
-static int NAME##_pcounter_getval(const struct pcounter *self, int cpu)        \
-{                                                                      \
-       return per_cpu(NAME##_pcounter_values, cpu);                    \
-}                                                                      \
-
-#define PCOUNTER_MEMBER_INITIALIZER(NAME, MEMBER)              \
-       MEMBER = {                                              \
-               .add    = NAME##_pcounter_add,                  \
-               .getval = NAME##_pcounter_getval,               \
-       }
-
-
-static inline void pcounter_add(struct pcounter *self, int inc)
-{
-       self->add(self, inc);
-}
-
-extern int pcounter_getval(const struct pcounter *self);
-extern int pcounter_alloc(struct pcounter *self);
-extern void pcounter_free(struct pcounter *self);
-
-
-#else /* CONFIG_SMP */
-
-static inline void pcounter_add(struct pcounter *self, int inc)
-{
-       self->val += inc;
-}
-
-static inline int pcounter_getval(const struct pcounter *self)
-{
-       return self->val;
-}
-
-#define DEFINE_PCOUNTER(NAME)
-#define PCOUNTER_MEMBER_INITIALIZER(NAME, MEMBER)
-#define pcounter_alloc(self) 0
-#define pcounter_free(self)
-
-#endif /* CONFIG_SMP */
-
-#endif /* __LINUX_PCOUNTER_H */

diff --git a/lib/Makefile b/lib/Makefile
index 23de261..4d059d4 100644 (file)
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -61,7 +61,6 @@ obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
 obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o
 obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o
 obj-$(CONFIG_SMP) += percpu_counter.o
-obj-$(CONFIG_SMP) += pcounter.o
 obj-$(CONFIG_AUDIT_GENERIC) += audit.o
 
 obj-$(CONFIG_SWIOTLB) += swiotlb.o

diff --git a/lib/pcounter.c b/lib/pcounter.c
deleted file mode 100644 (file)
index 9b56807..0000000
--- a/lib/pcounter.c
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Define default pcounter functions
- * Note that often used pcounters use dedicated functions to get a speed increase.
- * (see DEFINE_PCOUNTER/REF_PCOUNTER_MEMBER)
- */
-
-#include <linux/module.h>
-#include <linux/pcounter.h>
-#include <linux/smp.h>
-#include <linux/cpumask.h>
-
-static void pcounter_dyn_add(struct pcounter *self, int inc)
-{
-       per_cpu_ptr(self->per_cpu_values, smp_processor_id())[0] += inc;
-}
-
-static int pcounter_dyn_getval(const struct pcounter *self, int cpu)
-{
-       return per_cpu_ptr(self->per_cpu_values, cpu)[0];
-}
-
-int pcounter_getval(const struct pcounter *self)
-{
-       int res = 0, cpu;
-
-       for_each_possible_cpu(cpu)
-               res += self->getval(self, cpu);
-
-       return res;
-}
-EXPORT_SYMBOL_GPL(pcounter_getval);
-
-int pcounter_alloc(struct pcounter *self)
-{
-       int rc = 0;
-       if (self->add == NULL) {
-               self->per_cpu_values = alloc_percpu(int);
-               if (self->per_cpu_values != NULL) {
-                       self->add    = pcounter_dyn_add;
-                       self->getval = pcounter_dyn_getval;
-               } else
-                       rc = 1;
-       }
-       return rc;
-}
-EXPORT_SYMBOL_GPL(pcounter_alloc);
-
-void pcounter_free(struct pcounter *self)
-{
-       if (self->per_cpu_values != NULL) {
-               free_percpu(self->per_cpu_values);
-               self->per_cpu_values = NULL;
-               self->getval = NULL;
-               self->add = NULL;
-       }
-}
-EXPORT_SYMBOL_GPL(pcounter_free);
-