4 files changed, 48 insertions, 27 deletions

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index f4233b195dab..9212b017bc72 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -92,6 +92,7 @@ typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip,
  * STUB   - The ftrace_ops is just a place holder.
  * INITIALIZED - The ftrace_ops has already been initialized (first use time
  *            register_ftrace_function() is called, it will initialized the ops)
+ * DELETED - The ops are being deleted, do not let them be registered again.
  */
 enum {
         FTRACE_OPS_FL_ENABLED                   = 1 << 0,
@@ -103,13 +104,26 @@ enum {
         FTRACE_OPS_FL_RECURSION_SAFE            = 1 << 6,
         FTRACE_OPS_FL_STUB                      = 1 << 7,
         FTRACE_OPS_FL_INITIALIZED               = 1 << 8,
+        FTRACE_OPS_FL_DELETED                   = 1 << 9,
 };
 
+/*
+ * Note, ftrace_ops can be referenced outside of RCU protection.
+ * (Although, for perf, the control ops prevent that). If ftrace_ops is
+ * allocated and not part of kernel core data, the unregistering of it will
+ * perform a scheduling on all CPUs to make sure that there are no more users.
+ * Depending on the load of the system that may take a bit of time.
+ *
+ * Any private data added must also take care not to be freed and if private
+ * data is added to a ftrace_ops that is in core code, the user of the
+ * ftrace_ops must perform a schedule_on_each_cpu() before freeing it.
+ */
 struct ftrace_ops {
         ftrace_func_t                   func;
         struct ftrace_ops               *next;
         unsigned long                   flags;
         int __percpu                    *disabled;
+        void                            *private;
 #ifdef CONFIG_DYNAMIC_FTRACE
         struct ftrace_hash              *notrace_hash;
         struct ftrace_hash              *filter_hash;
@@ -285,7 +299,7 @@ extern void
 unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops);
 extern void unregister_ftrace_function_probe_all(char *glob);
 
-extern int ftrace_text_reserved(void *start, void *end);
+extern int ftrace_text_reserved(const void *start, const void *end);
 
 extern int ftrace_nr_registered_ops(void);
 
@@ -316,12 +330,9 @@ enum {
 #define FTRACE_REF_MAX          ((1UL << 29) - 1)
 
 struct dyn_ftrace {
-        union {
-                unsigned long           ip; /* address of mcount call-site */
-                struct dyn_ftrace       *freelist;
-        };
+        unsigned long           ip; /* address of mcount call-site */
         unsigned long           flags;
-        struct dyn_arch_ftrace          arch;
+        struct dyn_arch_ftrace  arch;
 };
 
 int ftrace_force_update(void);
@@ -409,7 +420,7 @@ ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable);
 
 /* defined in arch */
 extern int ftrace_ip_converted(unsigned long ip);
-extern int ftrace_dyn_arch_init(void *data);
+extern int ftrace_dyn_arch_init(void);
 extern void ftrace_replace_code(int enable);
 extern int ftrace_update_ftrace_func(ftrace_func_t func);
 extern void ftrace_caller(void);
@@ -541,7 +552,7 @@ static inline __init int unregister_ftrace_command(char *cmd_name)
 {
         return -EINVAL;
 }
-static inline int ftrace_text_reserved(void *start, void *end)
+static inline int ftrace_text_reserved(const void *start, const void *end)
 {
         return 0;
 }
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 4cdb3a17bcb5..cdc30111d2f8 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -163,6 +163,8 @@ void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
 
 void tracing_record_cmdline(struct task_struct *tsk);
 
+int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
+
 struct event_filter;
 
 enum trace_reg {
@@ -197,6 +199,32 @@ struct ftrace_event_class {
 extern int ftrace_event_reg(struct ftrace_event_call *event,
                             enum trace_reg type, void *data);
 
+int ftrace_output_event(struct trace_iterator *iter, struct ftrace_event_call *event,
+                        char *fmt, ...);
+
+int ftrace_event_define_field(struct ftrace_event_call *call,
+                              char *type, int len, char *item, int offset,
+                              int field_size, int sign, int filter);
+
+struct ftrace_event_buffer {
+        struct ring_buffer              *buffer;
+        struct ring_buffer_event        *event;
+        struct ftrace_event_file        *ftrace_file;
+        void                            *entry;
+        unsigned long                   flags;
+        int                             pc;
+};
+
+void *ftrace_event_buffer_reserve(struct ftrace_event_buffer *fbuffer,
+                                  struct ftrace_event_file *ftrace_file,
+                                  unsigned long len);
+
+void ftrace_event_buffer_commit(struct ftrace_event_buffer *fbuffer);
+
+int ftrace_event_define_field(struct ftrace_event_call *call,
+                              char *type, int len, char *item, int offset,
+                              int field_size, int sign, int filter);
+
 enum {
         TRACE_EVENT_FL_FILTERED_BIT,
         TRACE_EVENT_FL_CAP_ANY_BIT,
diff --git a/include/linux/module.h b/include/linux/module.h
index eaf60ff9ba94..5a5053975114 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -15,7 +15,7 @@
 #include <linux/stringify.h>
 #include <linux/kobject.h>
 #include <linux/moduleparam.h>
-#include <linux/tracepoint.h>
+#include <linux/jump_label.h>
 #include <linux/export.h>
 
 #include <linux/percpu.h>
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 7159a0a933df..812b2553dfd8 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -48,12 +48,6 @@ extern int tracepoint_probe_register(const char *name, void *probe, void *data);
 extern int
 tracepoint_probe_unregister(const char *name, void *probe, void *data);
 
-extern int tracepoint_probe_register_noupdate(const char *name, void *probe,
-                                              void *data);
-extern int tracepoint_probe_unregister_noupdate(const char *name, void *probe,
-                                                void *data);
-extern void tracepoint_probe_update_all(void);
-
 #ifdef CONFIG_MODULES
 struct tp_module {
         struct list_head list;
@@ -68,18 +62,6 @@ static inline bool trace_module_has_bad_taint(struct module *mod)
 }
 #endif /* CONFIG_MODULES */
 
-struct tracepoint_iter {
-#ifdef CONFIG_MODULES
-        struct tp_module *module;
-#endif /* CONFIG_MODULES */
-        struct tracepoint * const *tracepoint;
-};
-
-extern void tracepoint_iter_start(struct tracepoint_iter *iter);
-extern void tracepoint_iter_next(struct tracepoint_iter *iter);
-extern void tracepoint_iter_stop(struct tracepoint_iter *iter);
-extern void tracepoint_iter_reset(struct tracepoint_iter *iter);
-
 /*
  * tracepoint_synchronize_unregister must be called between the last tracepoint
  * probe unregistration and the end of module exit to make sure there is no