Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 30 insertions, 16 deletions

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 465df9ae104..de0b0f39d9d 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -344,7 +344,7 @@ static int current_index;
 static void do_cache_clean(struct work_struct *work);
 static struct delayed_work cache_cleaner;
 
-static void sunrpc_init_cache_detail(struct cache_detail *cd)
+void sunrpc_init_cache_detail(struct cache_detail *cd)
 {
 	rwlock_init(&cd->hash_lock);
 	INIT_LIST_HEAD(&cd->queue);
@@ -360,8 +360,9 @@ static void sunrpc_init_cache_detail(struct cache_detail *cd)
 	/* start the cleaning process */
 	schedule_delayed_work(&cache_cleaner, 0);
 }
+EXPORT_SYMBOL_GPL(sunrpc_init_cache_detail);
 
-static void sunrpc_destroy_cache_detail(struct cache_detail *cd)
+void sunrpc_destroy_cache_detail(struct cache_detail *cd)
 {
 	cache_purge(cd);
 	spin_lock(&cache_list_lock);
@@ -384,6 +385,7 @@ static void sunrpc_destroy_cache_detail(struct cache_detail *cd)
 out:
 	printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name);
 }
+EXPORT_SYMBOL_GPL(sunrpc_destroy_cache_detail);
 
 /* clean cache tries to find something to clean
  * and cleans it.
@@ -828,6 +830,8 @@ static ssize_t cache_do_downcall(char *kaddr, const char __user *buf,
 {
 	ssize_t ret;
 
+	if (count == 0)
+		return -EINVAL;
 	if (copy_from_user(kaddr, buf, count))
 		return -EFAULT;
 	kaddr[count] = '\0';
@@ -1643,12 +1647,6 @@ int cache_register_net(struct cache_detail *cd, struct net *net)
 }
 EXPORT_SYMBOL_GPL(cache_register_net);
 
-int cache_register(struct cache_detail *cd)
-{
-	return cache_register_net(cd, &init_net);
-}
-EXPORT_SYMBOL_GPL(cache_register);
-
 void cache_unregister_net(struct cache_detail *cd, struct net *net)
 {
 	remove_cache_proc_entries(cd, net);
@@ -1656,11 +1654,31 @@ void cache_unregister_net(struct cache_detail *cd, struct net *net)
 }
 EXPORT_SYMBOL_GPL(cache_unregister_net);
 
-void cache_unregister(struct cache_detail *cd)
+struct cache_detail *cache_create_net(struct cache_detail *tmpl, struct net *net)
+{
+	struct cache_detail *cd;
+
+	cd = kmemdup(tmpl, sizeof(struct cache_detail), GFP_KERNEL);
+	if (cd == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	cd->hash_table = kzalloc(cd->hash_size * sizeof(struct cache_head *),
+				 GFP_KERNEL);
+	if (cd->hash_table == NULL) {
+		kfree(cd);
+		return ERR_PTR(-ENOMEM);
+	}
+	cd->net = net;
+	return cd;
+}
+EXPORT_SYMBOL_GPL(cache_create_net);
+
+void cache_destroy_net(struct cache_detail *cd, struct net *net)
 {
-	cache_unregister_net(cd, &init_net);
+	kfree(cd->hash_table);
+	kfree(cd);
 }
-EXPORT_SYMBOL_GPL(cache_unregister);
+EXPORT_SYMBOL_GPL(cache_destroy_net);
 
 static ssize_t cache_read_pipefs(struct file *filp, char __user *buf,
 				 size_t count, loff_t *ppos)
@@ -1787,17 +1805,14 @@ int sunrpc_cache_register_pipefs(struct dentry *parent,
 	struct dentry *dir;
 	int ret = 0;
 
-	sunrpc_init_cache_detail(cd);
 	q.name = name;
 	q.len = strlen(name);
 	q.hash = full_name_hash(q.name, q.len);
 	dir = rpc_create_cache_dir(parent, &q, umode, cd);
 	if (!IS_ERR(dir))
 		cd->u.pipefs.dir = dir;
-	else {
-		sunrpc_destroy_cache_detail(cd);
+	else
 		ret = PTR_ERR(dir);
-	}
 	return ret;
 }
 EXPORT_SYMBOL_GPL(sunrpc_cache_register_pipefs);
@@ -1806,7 +1821,6 @@ void sunrpc_cache_unregister_pipefs(struct cache_detail *cd)
 {
 	rpc_remove_cache_dir(cd->u.pipefs.dir);
 	cd->u.pipefs.dir = NULL;
-	sunrpc_destroy_cache_detail(cd);
 }
 EXPORT_SYMBOL_GPL(sunrpc_cache_unregister_pipefs);