kexec jump: __ftrace_enabled_save/restore

[linux-2.6-omap-h63xx.git] / include / linux / ftrace.h

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 953a36d6a199abf9b684086a83d9e2f294da897d..bb384068272e1ef5ef9f4aa4a04572e48dcbfca5 100644 (file)
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -4,6 +4,7 @@
 #ifdef CONFIG_FTRACE
 
 #include <linux/linkage.h>
+#include <linux/fs.h>
 
 extern int ftrace_enabled;
 extern int
@@ -30,7 +31,6 @@ int unregister_ftrace_function(struct ftrace_ops *ops);
 void clear_ftrace_function(void);
 
 extern void ftrace_stub(unsigned long a0, unsigned long a1);
-extern void mcount(void);
 
 #else /* !CONFIG_FTRACE */
 # define register_ftrace_function(ops) do { } while (0)
@@ -43,18 +43,23 @@ extern void mcount(void);
 # define FTRACE_HASHSIZE       (1<<FTRACE_HASHBITS)
 
 enum {
-       FTRACE_FL_FAILED        = (1 << 0),
-       FTRACE_FL_FILTER        = (1 << 1),
-       FTRACE_FL_ENABLED       = (1 << 2),
+       FTRACE_FL_FREE          = (1 << 0),
+       FTRACE_FL_FAILED        = (1 << 1),
+       FTRACE_FL_FILTER        = (1 << 2),
+       FTRACE_FL_ENABLED       = (1 << 3),
+       FTRACE_FL_NOTRACE       = (1 << 4),
+       FTRACE_FL_CONVERTED     = (1 << 5),
+       FTRACE_FL_FROZEN        = (1 << 6),
 };
 
 struct dyn_ftrace {
        struct hlist_node node;
-       unsigned long     ip;
+       unsigned long     ip; /* address of mcount call-site */
        unsigned long     flags;
 };
 
 int ftrace_force_update(void);
+void ftrace_set_filter(unsigned char *buf, int len, int reset);
 
 /* defined in arch */
 extern int ftrace_ip_converted(unsigned long ip);
@@ -68,9 +73,23 @@ extern int ftrace_update_ftrace_func(ftrace_func_t func);
 extern void ftrace_caller(void);
 extern void ftrace_call(void);
 extern void mcount_call(void);
+
+extern int skip_trace(unsigned long ip);
+
+void ftrace_disable_daemon(void);
+void ftrace_enable_daemon(void);
+
 #else
-# define ftrace_force_update() ({ 0; })
-#endif
+# define skip_trace(ip)                                ({ 0; })
+# define ftrace_force_update()                 ({ 0; })
+# define ftrace_set_filter(buf, len, reset)    do { } while (0)
+# define ftrace_disable_daemon()               do { } while (0)
+# define ftrace_enable_daemon()                        do { } while (0)
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+/* totally disable ftrace - can not re-enable after this */
+void ftrace_kill(void);
+void ftrace_kill_atomic(void);
 
 static inline void tracer_disable(void)
 {
@@ -79,6 +98,27 @@ static inline void tracer_disable(void)
 #endif
 }
 
+/* Ftrace disable/restore without lock. Some synchronization mechanism
+ * must be used to prevent ftrace_enabled to be changed between
+ * disable/restore. */
+static inline int __ftrace_enabled_save(void)
+{
+#ifdef CONFIG_FTRACE
+       int saved_ftrace_enabled = ftrace_enabled;
+       ftrace_enabled = 0;
+       return saved_ftrace_enabled;
+#else
+       return 0;
+#endif
+}
+
+static inline void __ftrace_enabled_restore(int enabled)
+{
+#ifdef CONFIG_FTRACE
+       ftrace_enabled = enabled;
+#endif
+}
+
 #ifdef CONFIG_FRAME_POINTER
 /* TODO: need to fix this for ARM */
 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
@@ -87,6 +127,7 @@ static inline void tracer_disable(void)
 # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3))
 # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4))
 # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5))
+# define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6))
 #else
 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
 # define CALLER_ADDR1 0UL
@@ -94,22 +135,31 @@ static inline void tracer_disable(void)
 # define CALLER_ADDR3 0UL
 # define CALLER_ADDR4 0UL
 # define CALLER_ADDR5 0UL
+# define CALLER_ADDR6 0UL
 #endif
 
 #ifdef CONFIG_IRQSOFF_TRACER
-  extern void notrace time_hardirqs_on(unsigned long a0, unsigned long a1);
-  extern void notrace time_hardirqs_off(unsigned long a0, unsigned long a1);
+  extern void time_hardirqs_on(unsigned long a0, unsigned long a1);
+  extern void time_hardirqs_off(unsigned long a0, unsigned long a1);
 #else
 # define time_hardirqs_on(a0, a1)              do { } while (0)
 # define time_hardirqs_off(a0, a1)             do { } while (0)
 #endif
 
 #ifdef CONFIG_PREEMPT_TRACER
-  extern void notrace trace_preempt_on(unsigned long a0, unsigned long a1);
-  extern void notrace trace_preempt_off(unsigned long a0, unsigned long a1);
+  extern void trace_preempt_on(unsigned long a0, unsigned long a1);
+  extern void trace_preempt_off(unsigned long a0, unsigned long a1);
 #else
 # define trace_preempt_on(a0, a1)              do { } while (0)
 # define trace_preempt_off(a0, a1)             do { } while (0)
 #endif
 
+#ifdef CONFIG_TRACING
+extern void
+ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
+#else
+static inline void
+ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
+#endif
+
 #endif /* _LINUX_FTRACE_H */