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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-16 00:49:34 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-16 00:49:34 +0300
commit179a7ba6806805bd4cd7a5e4574b83353c5615ad (patch)
tree58855a59ba3bd66f947c3f9781cd44a7329c7d75 /include
parent5e176d6973bdac04d9f298ca384c39f08eb084cb (diff)
parent3dbb16b87b57bb1088044ad2a0432e4769075002 (diff)
downloadlinux-179a7ba6806805bd4cd7a5e4574b83353c5615ad.tar.xz
Merge tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt: "This release has a few updates: - STM can hook into the function tracer - Function filtering now supports more advance glob matching - Ftrace selftests updates and added tests - Softirq tag in traces now show only softirqs - ARM nop added to non traced locations at compile time - New trace_marker_raw file that allows for binary input - Optimizations to the ring buffer - Removal of kmap in trace_marker - Wakeup and irqsoff tracers now adhere to the set_graph_notrace file - Other various fixes and clean ups" * tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (42 commits) selftests: ftrace: Shift down default message verbosity kprobes/trace: Fix kprobe selftest for newer gcc tracing/kprobes: Add a helper method to return number of probe hits tracing/rb: Init the CPU mask on allocation tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too fgraph: Handle a case where a tracer ignores set_graph_notrace tracing: Replace kmap with copy_from_user() in trace_marker writing ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it tracing: Allow benchmark to be enabled at early_initcall() tracing: Have system enable return error if one of the events fail tracing: Do not start benchmark on boot up tracing: Have the reg function allow to fail ring-buffer: Force rb_end_commit() and rb_set_commit_to_write() inline ring-buffer: Froce rb_update_write_stamp() to be inlined ring-buffer: Force inline of hotpath helper functions tracing: Make __buffer_unlock_commit() always_inline tracing: Make tracepoint_printk a static_key ring-buffer: Always inline rb_event_data() ring-buffer: Make rb_reserve_next_event() always inlined ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/ftrace.h4
-rw-r--r--include/linux/stm.h4
-rw-r--r--include/linux/trace.h28
-rw-r--r--include/linux/tracepoint-defs.h2
-rw-r--r--include/linux/tracepoint.h2
-rw-r--r--include/trace/events/i2c.h2
6 files changed, 37 insertions, 5 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index d4a884db16a3..3633e8beff39 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -947,6 +947,10 @@ extern int __disable_trace_on_warning;
#define INIT_TRACE_RECURSION .trace_recursion = 0,
#endif
+int tracepoint_printk_sysctl(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos);
+
#else /* CONFIG_TRACING */
static inline void disable_trace_on_warning(void) { }
#endif /* CONFIG_TRACING */
diff --git a/include/linux/stm.h b/include/linux/stm.h
index 8369d8a8cabd..210ff2292361 100644
--- a/include/linux/stm.h
+++ b/include/linux/stm.h
@@ -133,7 +133,7 @@ int stm_source_register_device(struct device *parent,
struct stm_source_data *data);
void stm_source_unregister_device(struct stm_source_data *data);
-int stm_source_write(struct stm_source_data *data, unsigned int chan,
- const char *buf, size_t count);
+int notrace stm_source_write(struct stm_source_data *data, unsigned int chan,
+ const char *buf, size_t count);
#endif /* _STM_H_ */
diff --git a/include/linux/trace.h b/include/linux/trace.h
new file mode 100644
index 000000000000..9330a58e2651
--- /dev/null
+++ b/include/linux/trace.h
@@ -0,0 +1,28 @@
+#ifndef _LINUX_TRACE_H
+#define _LINUX_TRACE_H
+
+#ifdef CONFIG_TRACING
+/*
+ * The trace export - an export of Ftrace output. The trace_export
+ * can process traces and export them to a registered destination as
+ * an addition to the current only output of Ftrace - i.e. ring buffer.
+ *
+ * If you want traces to be sent to some other place rather than ring
+ * buffer only, just need to register a new trace_export and implement
+ * its own .write() function for writing traces to the storage.
+ *
+ * next - pointer to the next trace_export
+ * write - copy traces which have been delt with ->commit() to
+ * the destination
+ */
+struct trace_export {
+ struct trace_export __rcu *next;
+ void (*write)(const void *, unsigned int);
+};
+
+int register_ftrace_export(struct trace_export *export);
+int unregister_ftrace_export(struct trace_export *export);
+
+#endif /* CONFIG_TRACING */
+
+#endif /* _LINUX_TRACE_H */
diff --git a/include/linux/tracepoint-defs.h b/include/linux/tracepoint-defs.h
index 4ac89acb6136..a03192052066 100644
--- a/include/linux/tracepoint-defs.h
+++ b/include/linux/tracepoint-defs.h
@@ -29,7 +29,7 @@ struct tracepoint_func {
struct tracepoint {
const char *name; /* Tracepoint name */
struct static_key key;
- void (*regfunc)(void);
+ int (*regfunc)(void);
void (*unregfunc)(void);
struct tracepoint_func __rcu *funcs;
};
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index be586c632a0c..f72fcfe0e66a 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -81,7 +81,7 @@ static inline void tracepoint_synchronize_unregister(void)
}
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
-extern void syscall_regfunc(void);
+extern int syscall_regfunc(void);
extern void syscall_unregfunc(void);
#endif /* CONFIG_HAVE_SYSCALL_TRACEPOINTS */
diff --git a/include/trace/events/i2c.h b/include/trace/events/i2c.h
index fe17187df65d..4abb8eab34d3 100644
--- a/include/trace/events/i2c.h
+++ b/include/trace/events/i2c.h
@@ -20,7 +20,7 @@
/*
* drivers/i2c/i2c-core.c
*/
-extern void i2c_transfer_trace_reg(void);
+extern int i2c_transfer_trace_reg(void);
extern void i2c_transfer_trace_unreg(void);
/*