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9504504cba
linux/kernel/trace
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Steven Rostedt 9504504cba tracing: make trace_seq operations available for core kernel 
In the process to make TRACE_EVENT macro work for modules, the trace_seq
operations must be available for core kernel code.

These operations are quite useful and can be used for other implementations.

The main idea is that we create a trace_seq handle that acts very much
like the seq_file handle.

	struct trace_seq *s = kmalloc(sizeof(*s, GFP_KERNEL);

	trace_seq_init(s);
	trace_seq_printf(s, "some data %d\n", variable);

	printk("%s", s->buffer);

The main use is to allow a top level function call several other functions
that may store printf like data into the buffer. Then at the end, the top
level function can process all the data with any method it would like to.
It could be passed to userspace, output via printk or even use seq_file:

	trace_seq_to_user(s, ubuf, cnt);
	seq_puts(m, s->buffer);

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2009-04-14 12:57:57 -04:00
..
blktrace.c blktrace: fix output of BLK_TC_PC events 2009-04-12 15:32:46 +02:00
events.c tracing: consolidate trace and trace_event headers 2009-04-14 09:43:40 -04:00
ftrace.c function-graph: use int instead of atomic for ftrace_graph_active 2009-04-07 14:43:08 +02:00
Kconfig Merge branch 'linus' into tracing/core 2009-04-14 00:02:22 +02:00
kmemtrace.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
Makefile tracing/infrastructure: separate event tracer from event support 2009-04-14 00:00:55 +02:00
ring_buffer.c ring-buffer: add ring_buffer_discard_commit 2009-04-14 00:00:53 +02:00
trace_boot.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
trace_branch.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_clock.c tracing: fix four sparse warnings 2009-03-22 18:16:54 +01:00
trace_event_profile.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_event_types.h tracing/filters: add TRACE_EVENT_FORMAT_NOFILTER event macro 2009-04-14 00:00:51 +02:00
trace_events_filter.c tracing/filters: allow on-the-fly filter switching 2009-04-14 00:03:55 +02:00
trace_events_stage_1.h tracing: consolidate trace and trace_event headers 2009-04-14 09:43:40 -04:00
trace_events_stage_2.h tracing: consolidate trace and trace_event headers 2009-04-14 09:43:40 -04:00
trace_events_stage_3.h tracing: consolidate trace and trace_event headers 2009-04-14 09:43:40 -04:00
trace_events.c tracing/filters: allow on-the-fly filter switching 2009-04-14 00:03:55 +02:00
trace_export.c tracing/filters: allow on-the-fly filter switching 2009-04-14 00:03:55 +02:00
trace_functions_graph.c function-graph: add option to calculate graph time or not 2009-03-24 23:41:11 -04:00
trace_functions.c tracing/core: use appropriate waiting on trace_pipe 2009-02-18 01:40:20 +01:00
trace_hw_branches.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_irqsoff.c tracing: have latency tracers set the latency format 2009-03-04 22:15:30 -05:00
trace_mmiotrace.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c Merge branch 'tracing/urgent' into tracing/ftrace 2009-04-07 14:41:17 +02:00
trace_output.h tracing: make trace_seq operations available for core kernel 2009-04-14 12:57:57 -04:00
trace_power.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_printk.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_sched_switch.c ftrace: clean up enable logic for sched_switch 2009-04-07 14:43:09 +02:00
trace_sched_wakeup.c tracing: remove CALLER_ADDR2 from wakeup tracer 2009-04-07 13:58:54 +02:00
trace_selftest_dynamic.c ftrace: fix dynamic ftrace selftest 2008-05-23 21:13:23 +02:00
trace_selftest.c tracing: keep the tracing buffer after self-test failure 2009-03-22 15:17:21 +01:00
trace_stack.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_stat.c Merge branch 'linus' into tracing/core 2009-04-07 13:47:45 +02:00
trace_stat.h tracing: add handler to trace_stat 2009-03-24 23:22:58 -04:00
trace_syscalls.c tracing/syscalls: use a dedicated file header 2009-04-09 05:43:32 +02:00
trace_sysprof.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_workqueue.c Merge branch 'linus' into tracing/core 2009-04-07 13:47:45 +02:00
trace.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace.h tracing: make trace_seq operations available for core kernel 2009-04-14 12:57:57 -04:00