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, 67 insertions, 39 deletions

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index bb9127dd814b..c34b4c82b0dc 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -932,34 +932,14 @@ enum
 #include <linux/list.h>
 #include <linux/rcupdate.h>
 #include <linux/wait.h>
+#include <linux/rbtree.h>
 
 /* For the /proc/sys support */
 struct ctl_table;
 struct nsproxy;
 struct ctl_table_root;
-
-struct ctl_table_set {
-        struct list_head list;
-        struct ctl_table_set *parent;
-        int (*is_seen)(struct ctl_table_set *);
-};
-
-extern void setup_sysctl_set(struct ctl_table_set *p,
-        struct ctl_table_set *parent,
-        int (*is_seen)(struct ctl_table_set *));
-
 struct ctl_table_header;
-
-extern void sysctl_head_get(struct ctl_table_header *);
-extern void sysctl_head_put(struct ctl_table_header *);
-extern int sysctl_is_seen(struct ctl_table_header *);
-extern struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *);
-extern struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev);
-extern struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
-                                                struct ctl_table_header *prev);
-extern void sysctl_head_finish(struct ctl_table_header *prev);
-extern int sysctl_perm(struct ctl_table_root *root,
-                struct ctl_table *table, int op);
+struct ctl_dir;
 
 typedef struct ctl_table ctl_table;
 
@@ -1023,8 +1003,6 @@ static inline void *proc_sys_poll_event(struct ctl_table_poll *poll)
         return (void *)(unsigned long)atomic_read(&poll->event);
 }
 
-void proc_sys_poll_notify(struct ctl_table_poll *poll);
-
 #define __CTL_TABLE_POLL_INITIALIZER(name) {                            \
         .event = ATOMIC_INIT(0),                                        \
         .wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) }
@@ -1039,21 +1017,16 @@ struct ctl_table
         void *data;
         int maxlen;
         umode_t mode;
-        struct ctl_table *child;
-        struct ctl_table *parent;       /* Automatically set */
+        struct ctl_table *child;        /* Deprecated */
         proc_handler *proc_handler;     /* Callback for text formatting */
         struct ctl_table_poll *poll;
         void *extra1;
         void *extra2;
 };
 
-struct ctl_table_root {
-        struct list_head root_list;
-        struct ctl_table_set default_set;
-        struct ctl_table_set *(*lookup)(struct ctl_table_root *root,
-                                           struct nsproxy *namespaces);
-        int (*permissions)(struct ctl_table_root *root,
-                        struct nsproxy *namespaces, struct ctl_table *table);
+struct ctl_node {
+        struct rb_node node;
+        struct ctl_table_header *header;
 };
 
 /* struct ctl_table_header is used to maintain dynamic lists of
@@ -1063,9 +1036,9 @@ struct ctl_table_header
         union {
                 struct {
                         struct ctl_table *ctl_table;
-                        struct list_head ctl_entry;
                         int used;
                         int count;
+                        int nreg;
                 };
                 struct rcu_head rcu;
         };
@@ -1073,9 +1046,27 @@ struct ctl_table_header
         struct ctl_table *ctl_table_arg;
         struct ctl_table_root *root;
         struct ctl_table_set *set;
-        struct ctl_table *attached_by;
-        struct ctl_table *attached_to;
-        struct ctl_table_header *parent;
+        struct ctl_dir *parent;
+        struct ctl_node *node;
+};
+
+struct ctl_dir {
+        /* Header must be at the start of ctl_dir */
+        struct ctl_table_header header;
+        struct rb_root root;
+};
+
+struct ctl_table_set {
+        int (*is_seen)(struct ctl_table_set *);
+        struct ctl_dir dir;
+};
+
+struct ctl_table_root {
+        struct ctl_table_set default_set;
+        struct ctl_table_set *(*lookup)(struct ctl_table_root *root,
+                                           struct nsproxy *namespaces);
+        int (*permissions)(struct ctl_table_root *root,
+                        struct nsproxy *namespaces, struct ctl_table *table);
 };
 
 /* struct ctl_path describes where in the hierarchy a table is added */
@@ -1083,16 +1074,53 @@ struct ctl_path {
         const char *procname;
 };
 
+#ifdef CONFIG_SYSCTL
+
+void proc_sys_poll_notify(struct ctl_table_poll *poll);
+
+extern void setup_sysctl_set(struct ctl_table_set *p,
+        struct ctl_table_root *root,
+        int (*is_seen)(struct ctl_table_set *));
+extern void retire_sysctl_set(struct ctl_table_set *set);
+
 void register_sysctl_root(struct ctl_table_root *root);
+struct ctl_table_header *__register_sysctl_table(
+        struct ctl_table_set *set,
+        const char *path, struct ctl_table *table);
 struct ctl_table_header *__register_sysctl_paths(
-        struct ctl_table_root *root, struct nsproxy *namespaces,
+        struct ctl_table_set *set,
         const struct ctl_path *path, struct ctl_table *table);
+struct ctl_table_header *register_sysctl(const char *path, struct ctl_table *table);
 struct ctl_table_header *register_sysctl_table(struct ctl_table * table);
 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
                                                 struct ctl_table *table);
 
 void unregister_sysctl_table(struct ctl_table_header * table);
-int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table);
+
+extern int sysctl_init(void);
+#else /* CONFIG_SYSCTL */
+static inline struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
+{
+        return NULL;
+}
+
+static inline struct ctl_table_header *register_sysctl_paths(
+                        const struct ctl_path *path, struct ctl_table *table)
+{
+        return NULL;
+}
+
+static inline void unregister_sysctl_table(struct ctl_table_header * table)
+{
+}
+
+static inline void setup_sysctl_set(struct ctl_table_set *p,
+        struct ctl_table_root *root,
+        int (*is_seen)(struct ctl_table_set *))
+{
+}
+
+#endif /* CONFIG_SYSCTL */
 
 #endif /* __KERNEL__ */