linux/kernel/trace/trace_irqsoff.c, branch v4.4

tracing: report_latency() in trace_irqsoff.c can return boolean

2015-11-02T19:20:19Z

This patch makes report_latency return bool due to this particular function only using either one or zero as its return value. No functional change. Link: http://lkml.kernel.org/r/1443537816-5788-3-git-send-email-bywxiaobai@163.com Signed-off-by: Yaowei Bai Signed-off-by: Steven Rostedt

tracing: Move trace_flags from global to a trace_array field

2015-09-30T19:22:55Z

In preparation to make trace options per instance, the global trace_flags needs to be moved from being a global variable to a field within the trace instance trace_array structure. There's still more work to do, as there's some functions that use trace_flags without passing in a way to get to the current_trace array. For those, the global_trace is used directly (from trace.c). This includes setting and clearing the trace_flags. This means that when a new instance is created, it just gets the trace_flags of the global_trace and will not be able to modify them. Depending on the functions that have access to the trace_array, the flags of an instance may not affect parts of its trace, where the global_trace is used. These will be fixed in future changes. Signed-off-by: Steven Rostedt

tracing: Do not create function tracer options when not compiled in

2015-09-29T19:01:34Z

When the function tracer is not compiled in, do not create the option files for it. Fix up both the sched_wakeup and irqsoff tracers to handle the change. Signed-off-by: Steven Rostedt

tracing: Only create function graph options when it is compiled in

2015-09-29T17:23:58Z

Do not create fuction graph tracer options when function graph tracer is not even compiled in. Signed-off-by: Steven Rostedt

tracing: Move "display-graph" option to main options

2015-09-29T16:56:40Z

In order to facilitate making all tracer options visible even when the tracer is not active, we need to get rid of duplicate options. Any option that is shared between multiple tracers really should be a main option. As the wakeup and irqsoff tracers both use the "display-graph" option, and use it exactly the same way, move that option from the tracer options to the main options and consolidate them. Signed-off-by: Steven Rostedt

tracing: Remove unneeded includes of debugfs.h and fs.h

2015-01-22T16:19:48Z

The creation of tracing files and directories is for the most part encapsulated in helper functions in trace.c. Other files do not need to include debugfs.h or fs.h, as they may have needed to in the past. Remove them from the files that do not need them. Signed-off-by: Steven Rostedt

tracing: Allow irq/preempt tracers to be used by instances

2014-04-21T17:59:29Z

The irqsoff, preemptoff and preemptirqsoff tracers can now be used by instances. But they may only be used by one instance at a time (including the top level directory). This allows multiple tracers to run while the irqsoff (and friends) tracer is running simultaneously. Signed-off-by: Steven Rostedt

tracing: Move tracing_max_latency into trace_array

2014-04-21T17:59:26Z

In preparation for letting the latency tracers be used by instances, remove the global tracing_max_latency variable and add a max_latency field to the trace_array that the latency tracers will now use. Signed-off-by: Steven Rostedt

ftrace: Remove global function list and call function directly

2014-04-21T17:59:25Z

Instead of having a list of global functions that are called, as only one global function is allow to be enabled at a time, there's no reason to have a list. Instead, simply have all the users of the global ops, use the global ops directly, instead of registering their own ftrace_ops. Just switch what function is used before enabling the function tracer. This removes a lot of code as well as the complexity involved with it. Signed-off-by: Steven Rostedt

Merge tag 'trace-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2014-04-03T17:26:31Z

Pull tracing updates from Steven Rostedt: "Most of the changes were largely clean ups, and some documentation. But there were a few features that were added: Uprobes now work with event triggers and multi buffers and have support under ftrace and perf. The big feature is that the function tracer can now be used within the multi buffer instances. That is, you can now trace some functions in one buffer, others in another buffer, all functions in a third buffer and so on. They are basically agnostic from each other. This only works for the function tracer and not for the function graph trace, although you can have the function graph tracer running in the top level buffer (or any tracer for that matter) and have different function tracing going on in the sub buffers" * tag 'trace-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (45 commits) tracing: Add BUG_ON when stack end location is over written tracepoint: Remove unused API functions Revert "tracing: Move event storage for array from macro to standalone function" ftrace: Constify ftrace_text_reserved tracepoints: API doc update to tracepoint_probe_register() return value tracepoints: API doc update to data argument ftrace: Fix compilation warning about control_ops_free ftrace/x86: BUG when ftrace recovery fails ftrace: Warn on error when modifying ftrace function ftrace: Remove freelist from struct dyn_ftrace ftrace: Do not pass data to ftrace_dyn_arch_init ftrace: Pass retval through return in ftrace_dyn_arch_init() ftrace: Inline the code from ftrace_dyn_table_alloc() ftrace: Cleanup of global variables ftrace_new_pgs and ftrace_update_cnt tracing: Evaluate len expression only once in __dynamic_array macro tracing: Correctly expand len expressions from __dynamic_array macro tracing/module: Replace include of tracepoint.h with jump_label.h in module.h tracing: Fix event header migrate.h to include tracepoint.h tracing: Fix event header writeback.h to include tracepoint.h tracing: Warn if a tracepoint is not set via debugfs ...