Reviewed by: Mike Leach mike.leach@linaro.org

On Thu, 9 Feb 2023 at 07:14, Randy Dunlap rdunlap@infradead.org wrote:

Correct spelling problems for Documentation/trace/ as reported by codespell.

Signed-off-by: Randy Dunlap rdunlap@infradead.org Cc: Steven Rostedt rostedt@goodmis.org Cc: Masami Hiramatsu mhiramat@kernel.org Cc: Daniel Bristot de Oliveira bristot@kernel.org Cc: linux-trace-kernel@vger.kernel.org Cc: Mathieu Poirier mathieu.poirier@linaro.org Cc: Suzuki K Poulose suzuki.poulose@arm.com Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: Jonathan Corbet corbet@lwn.net Cc: linux-doc@vger.kernel.org Reviewed-by: Mukesh Ojha quic_mojha@quicinc.com Acked-by: Steven Rostedt (Google) rostedt@goodmis.org Acked-by: Suzuki K Poulose suzuki.poulose@arm.com # for coresight

---

Documentation/trace/coresight/coresight-etm4x-reference.rst | 2 +- Documentation/trace/events.rst | 6 +++--- Documentation/trace/fprobe.rst | 2 +- Documentation/trace/ftrace-uses.rst | 2 +- Documentation/trace/hwlat_detector.rst | 2 +- Documentation/trace/uprobetracer.rst | 2 +- 7 files changed, 9 insertions(+), 9 deletions(-)

diff -- a/Documentation/trace/coresight/coresight-etm4x-reference.rst b/Documentation/trace/coresight/coresight-etm4x-reference.rst --- a/Documentation/trace/coresight/coresight-etm4x-reference.rst +++ b/Documentation/trace/coresight/coresight-etm4x-reference.rst @@ -675,7 +675,7 @@ Bit assignments shown below:- reconstructed using only conditional branches.

 There is currently no support in Perf for supplying modified binaries to the decoder, so this

• feature is only inteded to be used for debugging purposes or with a 3rd party tool.

• feature is only intended to be used for debugging purposes or with a 3rd party tool.

  Choosing this option will result in a significant increase in the amount of trace generated - possible danger of overflows, or fewer instructions covered. Note, that this option also

diff -- a/Documentation/trace/events.rst b/Documentation/trace/events.rst --- a/Documentation/trace/events.rst +++ b/Documentation/trace/events.rst @@ -903,7 +903,7 @@ functions can be used.

To create a kprobe event, an empty or partially empty kprobe event should first be created using kprobe_event_gen_cmd_start(). The name -of the event and the probe location should be specfied along with one +of the event and the probe location should be specified along with one or args each representing a probe field should be supplied to this function. Before calling kprobe_event_gen_cmd_start(), the user should create and initialize a dynevent_cmd object using @@ -983,7 +983,7 @@ The basic idea is simple and amounts to layer that can be used to generate trace event commands. The generated command strings can then be passed to the command-parsing and event creation code that already exists in the trace event -subystem for creating the corresponding trace events. +subsystem for creating the corresponding trace events.

In a nutshell, the way it works is that the higher-level interface code creates a struct dynevent_cmd object, then uses a couple @@ -1056,7 +1056,7 @@ to add an operator between the pair (her appended onto the end of the arg pair (here ';').

There's also a dynevent_str_add() function that can be used to simply -add a string as-is, with no spaces, delimeters, or arg check. +add a string as-is, with no spaces, delimiters, or arg check.

Any number of dynevent_*_add() calls can be made to build up the string (until its length surpasses cmd->maxlen). When all the arguments have diff -- a/Documentation/trace/fprobe.rst b/Documentation/trace/fprobe.rst --- a/Documentation/trace/fprobe.rst +++ b/Documentation/trace/fprobe.rst @@ -111,7 +111,7 @@ saved at function entry and passed to ex the instruction pointer of @regs may be different from the @entry_ip in the entry_handler. If you need traced instruction pointer, you need to use @entry_ip. On the other hand, in the exit_handler, the instruction

•    pointer of @regs is set to the currect return address.
  

•    pointer of @regs is set to the correct return address.
  
  

Share the callbacks with kprobes

diff -- a/Documentation/trace/ftrace-uses.rst b/Documentation/trace/ftrace-uses.rst --- a/Documentation/trace/ftrace-uses.rst +++ b/Documentation/trace/ftrace-uses.rst @@ -193,7 +193,7 @@ FTRACE_OPS_FL_RECURSION Not, if this flag is set, then the callback will always be called with preemption disabled. If it is not set, then it is possible (but not guaranteed) that the callback will be called in

•   preemptable context.
  

•   preemptible context.
  
  

FTRACE_OPS_FL_IPMODIFY Requires FTRACE_OPS_FL_SAVE_REGS set. If the callback is to "hijack" diff -- a/Documentation/trace/hwlat_detector.rst b/Documentation/trace/hwlat_detector.rst --- a/Documentation/trace/hwlat_detector.rst +++ b/Documentation/trace/hwlat_detector.rst @@ -14,7 +14,7 @@ originally written for use by the "RT" p kernel is highly latency sensitive.

SMIs are not serviced by the Linux kernel, which means that it does not -even know that they are occuring. SMIs are instead set up by BIOS code +even know that they are occurring. SMIs are instead set up by BIOS code and are serviced by BIOS code, usually for "critical" events such as management of thermal sensors and fans. Sometimes though, SMIs are used for other tasks and those tasks can spend an inordinate amount of time in the diff -- a/Documentation/trace/uprobetracer.rst b/Documentation/trace/uprobetracer.rst --- a/Documentation/trace/uprobetracer.rst +++ b/Documentation/trace/uprobetracer.rst @@ -55,7 +55,7 @@ Synopsis of uprobe_tracer

(*1) only for return probe. (*2) this is useful for fetching a field of data structures.

• (*3) Unlike kprobe event, "u" prefix will just be ignored, becuse uprobe

• (*3) Unlike kprobe event, "u" prefix will just be ignored, because uprobe events can access only user-space memory.

Types

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