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authorNick Piggin <nickpiggin@yahoo.com.au>2006-01-08 10:02:19 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-09 05:13:48 +0100
commit095975da26dba21698582e91e96be10f7417333f (patch)
treece1ffac556d394ef56a18faa97d38f79b07f31e2 /kernel
parent[PATCH] atomic: dec_and_lock use atomic primitives (diff)
downloadlinux-095975da26dba21698582e91e96be10f7417333f.tar.xz
linux-095975da26dba21698582e91e96be10f7417333f.zip
[PATCH] rcu file: use atomic primitives
Use atomic_inc_not_zero for rcu files instead of special case rcuref. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/rcupdate.c14
-rw-r--r--kernel/rcutorture.c1
2 files changed, 0 insertions, 15 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 0a669bd2f6d1..30b0bba03859 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -46,7 +46,6 @@
#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/rcupdate.h>
-#include <linux/rcuref.h>
#include <linux/cpu.h>
/* Definition for rcupdate control block. */
@@ -74,19 +73,6 @@ DEFINE_PER_CPU(struct rcu_data, rcu_bh_data) = { 0L };
static DEFINE_PER_CPU(struct tasklet_struct, rcu_tasklet) = {NULL};
static int maxbatch = 10000;
-#ifndef __HAVE_ARCH_CMPXCHG
-/*
- * We use an array of spinlocks for the rcurefs -- similar to ones in sparc
- * 32 bit atomic_t implementations, and a hash function similar to that
- * for our refcounting needs.
- * Can't help multiprocessors which donot have cmpxchg :(
- */
-
-spinlock_t __rcuref_hash[RCUREF_HASH_SIZE] = {
- [0 ... (RCUREF_HASH_SIZE-1)] = SPIN_LOCK_UNLOCKED
-};
-#endif
-
/**
* call_rcu - Queue an RCU callback for invocation after a grace period.
* @head: structure to be used for queueing the RCU updates.
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 36efe088ad81..75174c81529a 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -39,7 +39,6 @@
#include <linux/moduleparam.h>
#include <linux/percpu.h>
#include <linux/notifier.h>
-#include <linux/rcuref.h>
#include <linux/cpu.h>
#include <linux/random.h>
#include <linux/delay.h>