Commit ccb469a1 authored by Steven Rostedt's avatar Steven Rostedt Committed by Steven Rostedt
Browse files

tracing: Pass the ftrace_file to the buffer lock reserve code



Pass the struct ftrace_event_file *ftrace_file to the
trace_event_buffer_lock_reserve() (new function that replaces the
trace_current_buffer_lock_reserver()).

The ftrace_file holds a pointer to the trace_array that is in use.
In the case of multiple buffers with different trace_arrays, this
allows different events to be recorded into different buffers.

Also fixed some of the stale comments in include/trace/ftrace.h
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 2b6080f2
......@@ -128,6 +128,13 @@ enum print_line_t {
void tracing_generic_entry_update(struct trace_entry *entry,
unsigned long flags,
int pc);
struct ftrace_event_file;
struct ring_buffer_event *
trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer,
struct ftrace_event_file *ftrace_file,
int type, unsigned long len,
unsigned long flags, int pc);
struct ring_buffer_event *
trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
int type, unsigned long len,
......
......@@ -414,7 +414,8 @@ static inline notrace int ftrace_get_offsets_##call( \
*
* static void ftrace_raw_event_<call>(void *__data, proto)
* {
* struct ftrace_event_call *event_call = __data;
* struct ftrace_event_file *ftrace_file = __data;
* struct ftrace_event_call *event_call = ftrace_file->event_call;
* struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
* struct ring_buffer_event *event;
* struct ftrace_raw_<call> *entry; <-- defined in stage 1
......@@ -428,7 +429,7 @@ static inline notrace int ftrace_get_offsets_##call( \
*
* __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
*
* event = trace_current_buffer_lock_reserve(&buffer,
* event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
* event_<call>->event.type,
* sizeof(*entry) + __data_size,
* irq_flags, pc);
......@@ -440,7 +441,7 @@ static inline notrace int ftrace_get_offsets_##call( \
* __array macros.
*
* if (!filter_current_check_discard(buffer, event_call, entry, event))
* trace_current_buffer_unlock_commit(buffer,
* trace_nowake_buffer_unlock_commit(buffer,
* event, irq_flags, pc);
* }
*
......@@ -533,7 +534,7 @@ ftrace_raw_event_##call(void *__data, proto) \
\
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
\
event = trace_current_buffer_lock_reserve(&buffer, \
event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, \
event_call->event.type, \
sizeof(*entry) + __data_size, \
irq_flags, pc); \
......
......@@ -1293,6 +1293,18 @@ void trace_buffer_unlock_commit(struct ring_buffer *buffer,
}
EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit);
struct ring_buffer_event *
trace_event_buffer_lock_reserve(struct ring_buffer **current_rb,
struct ftrace_event_file *ftrace_file,
int type, unsigned long len,
unsigned long flags, int pc)
{
*current_rb = ftrace_file->tr->buffer;
return trace_buffer_lock_reserve(*current_rb,
type, len, flags, pc);
}
EXPORT_SYMBOL_GPL(trace_event_buffer_lock_reserve);
struct ring_buffer_event *
trace_current_buffer_lock_reserve(struct ring_buffer **current_rb,
int type, unsigned long len,
......
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