[NET] proto: Use pcounters for the inuse field
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sock.h b/include/net/sock.h
index 9c55af8..e329d05 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -47,6 +47,7 @@
#include <linux/module.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
+#include <linux/pcounter.h>
#include <linux/skbuff.h> /* struct sk_buff */
#include <linux/mm.h>
#include <linux/security.h>
@@ -565,14 +566,9 @@
void (*unhash)(struct sock *sk);
int (*get_port)(struct sock *sk, unsigned short snum);
-#ifdef CONFIG_SMP
/* Keeping track of sockets in use */
- void (*inuse_add)(struct proto *prot, int inc);
- int (*inuse_getval)(const struct proto *prot);
- int *inuse_ptr;
-#else
- int inuse;
-#endif
+ struct pcounter inuse;
+
/* Memory pressure */
void (*enter_memory_pressure)(void);
atomic_t *memory_allocated; /* Current allocated memory. */
@@ -607,35 +603,8 @@
#endif
};
-/*
- * Special macros to let protos use a fast version of inuse{get|add}
- * using a static percpu variable per proto instead of an allocated one,
- * saving one dereference.
- * This might be changed if/when dynamic percpu vars become fast.
- */
-#ifdef CONFIG_SMP
-# define DEFINE_PROTO_INUSE(NAME) \
-static DEFINE_PER_CPU(int, NAME##_inuse); \
-static void NAME##_inuse_add(struct proto *prot, int inc) \
-{ \
- __get_cpu_var(NAME##_inuse) += inc; \
-} \
- \
-static int NAME##_inuse_getval(const struct proto *prot)\
-{ \
- int res = 0, cpu; \
- \
- for_each_possible_cpu(cpu) \
- res += per_cpu(NAME##_inuse, cpu); \
- return res; \
-}
-# define REF_PROTO_INUSE(NAME) \
- .inuse_add = NAME##_inuse_add, \
- .inuse_getval = NAME##_inuse_getval,
-#else
-# define DEFINE_PROTO_INUSE(NAME)
-# define REF_PROTO_INUSE(NAME)
-#endif
+#define DEFINE_PROTO_INUSE(NAME) DEFINE_PCOUNTER(NAME)
+#define REF_PROTO_INUSE(NAME) PCOUNTER_MEMBER_INITIALIZER(NAME, .inuse)
extern int proto_register(struct proto *prot, int alloc_slab);
extern void proto_unregister(struct proto *prot);
@@ -668,29 +637,17 @@
/* Called with local bh disabled */
static __inline__ void sock_prot_inc_use(struct proto *prot)
{
-#ifdef CONFIG_SMP
- prot->inuse_add(prot, 1);
-#else
- prot->inuse++;
-#endif
+ pcounter_add(&prot->inuse, 1);
}
static __inline__ void sock_prot_dec_use(struct proto *prot)
{
-#ifdef CONFIG_SMP
- prot->inuse_add(prot, -1);
-#else
- prot->inuse--;
-#endif
+ pcounter_add(&prot->inuse, -1);
}
static __inline__ int sock_prot_inuse(struct proto *proto)
{
-#ifdef CONFIG_SMP
- return proto->inuse_getval(proto);
-#else
- return proto->inuse;
-#endif
+ return pcounter_getval(&proto->inuse);
}
/* With per-bucket locks this operation is not-atomic, so that