16 Jun, 2009
2 commits
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The firmware example files are beyond broken, and will not work, and
should not be used as an example at all. So lets remove them and hope
someone writes new files sometime in the future.Signed-off-by: Greg Kroah-Hartman
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With SAMPLE_KOBJECT=y, it isn't even linked into the kernel image.
Signed-off-by: Michal Marek
Signed-off-by: Greg Kroah-Hartman
07 May, 2009
1 commit
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When creating trace events for ftrace, the header file with the TRACE_EVENT
macros must also have a macro called TRACE_SYSTEM. This macro describes
the name of the system the TRACE_EVENTS are defined for. It also doubles
as a way for the define_trace.h file to include the file that included
it.For example:
in irq.h
#define TRACE_SYSTEM irq
[...]
#include
The define_trace will use TRACE_SYSTEM to include irq.h. But if the name
of the trace system does not match the name of the trace header file,
one can override it with:Which will change define_trace.h to inclued foo_trace.h instead of foo.h
The sample comments this, but people that use the sample code will more
likely use the code and not read the comments. This patch changes the
sample code to use the TRACE_INCLUDE_FILE to better show developers how to
use it.[ Impact: make sample less confusing to developers ]
Reported-by: Christoph Hellwig
Signed-off-by: Steven Rostedt
06 May, 2009
3 commits
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Use -I$(src) to add the current directory the include path.
[ Impact: cleanup ]
Signed-off-by: Christoph Hellwig
Acked-by: Steven Rostedt
LKML-Reference:
Signed-off-by: Ingo Molnar -
Normally a config should be default to n. This patch also makes the
sample module-only, like SAMPLE_MARKERS and SAMPLE_TRACEPOINTS.[ Impact: don't build trace event sample by default ]
Signed-off-by: Li Zefan
Acked-by: Steven Rostedt
Acked-by: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar -
The sample is useful for testing, and I'm using it. But after
loading the module, it keeps saying hi every 10 seconds, this may
be disturbing.Also Steven said commenting out the "hi" helped in causing races. :)
[ Impact: make testing a bit easier ]
Signed-off-by: Li Zefan
Acked-by: Steven Rostedt
Acked-by: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar
15 Apr, 2009
1 commit
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This patch adds a sample to the samples directory on how to create
and use TRACE_EVENT trace points.Signed-off-by: Steven Rostedt
25 Mar, 2009
1 commit
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Fix the tracepoint documentation to refer to "tracepoint-sample"
instead of "tracepoint-example" to match what actually exists;
fix the directory, and clarify how to compile.Change every instance of "example" in the sample tracepoint code
to "sample" for consistency.Signed-off-by: Jody McIntyre
Acked-by: Mathieu Desnoyers
Cc: torvalds@linux-foundation.org
LKML-Reference:
Signed-off-by: Ingo Molnar
10 Mar, 2009
1 commit
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Impact: clean up
The macros TPPROTO, TPARGS, TPFMT, TPRAWFMT, and TPCMD all look a bit
ugly. This patch adds an underscore to their names.Signed-off-by: Steven Rostedt
07 Jan, 2009
1 commit
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None of these (init|exit) functions is called from other functions which
is outside the kernel module mechanism or kernel itself, so mark them as
{static|__init|__exit}.Signed-off-by: Qinghuang Feng
Cc: Mathieu Desnoyers
Acked-by: Greg Kroah-Hartman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Nov, 2008
2 commits
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Impact: API *CHANGE*. Must update all tracepoint users.
Add DEFINE_TRACE() to tracepoints to let them declare the tracepoint
structure in a single spot for all the kernel. It helps reducing memory
consumption, especially when declaring a lot of tracepoints, e.g. for
kmalloc tracing.*API CHANGE WARNING*: now, DECLARE_TRACE() must be used in headers for
tracepoint declarations rather than DEFINE_TRACE(). This is the sane way
to do it. The name previously used was misleading.Updates scheduler instrumentation to follow this API change.
Signed-off-by: Mathieu Desnoyers
Signed-off-by: Ingo Molnar -
Impact: fix a bug in sample tracepoints
Need a tracepoint_synchronize_unregister() before the end of exit() to
make sure every probe callers have exited the non preemptible section
and thus are not executing the probe code anymore.Signed-off-by: Mathieu Desnoyers
Signed-off-by: Ingo Molnar
14 Oct, 2008
2 commits
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Need a marker_synchronize_unregister() before the end of exit() to make sure
every probe callers have exited the non preemptible section and thus are not
executing the probe code anymore.Signed-off-by: Mathieu Desnoyers
Signed-off-by: Ingo Molnar -
Tracepoint example code under samples/.
Signed-off-by: Mathieu Desnoyers
Acked-by: 'Peter Zijlstra'
Signed-off-by: Ingo Molnar
22 Jul, 2008
2 commits
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We should call kobject_put() instead of kfree() if kobject_init_and_add()
returns an error, shouldn't we? Don't set up a bad example ;)Signed-off-by: Li Zefan
Signed-off-by: Greg Kroah-Hartman -
It's not like this stuff even builds right now, but this will make
Randy's scripts happy :)Cc: Randy Dunlap
Signed-off-by: Greg Kroah-Hartman
29 Apr, 2008
1 commit
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Use proc_create() to make sure that ->proc_fops be setup before gluing PDE to
main tree.Signed-off-by: Denis V. Lunev
Cc: Mathieu Desnoyers
Cc: Alexey Dobriyan
Cc: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Apr, 2008
1 commit
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial: (24 commits)
DOC: A couple corrections and clarifications in USB doc.
Generate a slightly more informative error msg for bad HZ
fix typo "is" -> "if" in Makefile
ext*: spelling fix prefered -> preferred
DOCUMENTATION: Use newer DEFINE_SPINLOCK macro in docs.
KEYS: Fix the comment to match the file name in rxrpc-type.h.
RAID: remove trailing space from printk line
DMA engine: typo fixes
Remove unused MAX_NODES_SHIFT
MAINTAINERS: Clarify access to OCFS2 development mailing list.
V4L: Storage class should be before const qualifier (sn9c102)
V4L: Storage class should be before const qualifier
sonypi: Storage class should be before const qualifier
intel_menlow: Storage class should be before const qualifier
DVB: Storage class should be before const qualifier
arm: Storage class should be before const qualifier
ALSA: Storage class should be before const qualifier
acpi: Storage class should be before const qualifier
firmware_sample_driver.c: fix coding style
MAINTAINERS: Add ati_remote2 driver
...Fixed up trivial conflicts in firmware_sample_driver.c
20 Apr, 2008
2 commits
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This fixes up a number of coding style issues in the firmware sample files.
Yeah, it still doesn't build properly yet, that's next...
Cc: Randy Dunlap
Cc: Marcel Holtmann
Signed-off-by: Greg Kroah-Hartman -
Move the firmware_class sample drivers to samples/ so that they are
buildable and can be maintained.Signed-off-by: Randy Dunlap
Acked-by: Marcel Holtmann
Signed-off-by: Greg Kroah-Hartman
05 Mar, 2008
1 commit
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Move kprobes examples from Documentation/kprobes.txt to under samples/.
Patch originally by Randy Dunlap.o Updated the patch to apply on 2.6.25-rc3
o Modified examples code to build on multiple architectures. Currently,
the kprobe and jprobe examples code works for x86 and powerpc
o Cleaned up unneeded #includes
o Cleaned up Kconfig per Sam Ravnborg's suggestions to fix build break
on archs that don't have kretprobes
o Implemented suggestions by Mathieu Desnoyers on CONFIG_KRETPROBES
o Included Andrew Morton's cleanup based on x86-git
o Modified kretprobe_example to act as a arch-agnostic module to
determine routine execution times:
Use 'modprobe kretprobe_example func=' to determine
execution time of func_name in nanoseconds.Signed-off-by: Randy Dunlap
Signed-off-by: Ananth N Mavinakayanahalli
Acked-by: Mathieu Desnoyers
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Feb, 2008
1 commit
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RCU style multiple probes support for the Linux Kernel Markers. Common case
(one probe) is still fast and does not require dynamic allocation or a
supplementary pointer dereference on the fast path.- Move preempt disable from the marker site to the callback.
Since we now have an internal callback, move the preempt disable/enable to the
callback instead of the marker site.Since the callback change is done asynchronously (passing from a handler that
supports arguments to a handler that does not setup the arguments is no
arguments are passed), we can safely update it even if it is outside the
preempt disable section.- Move probe arm to probe connection. Now, a connected probe is automatically
armed.Remove MARK_MAX_FORMAT_LEN, unused.
This patch modifies the Linux Kernel Markers API : it removes the probe
"arm/disarm" and changes the probe function prototype : it now expects a
va_list * instead of a "...".If we want to have more than one probe connected to a marker at a given
time (LTTng, or blktrace, ssytemtap) then we need this patch. Without it,
connecting a second probe handler to a marker will fail.It allow us, for instance, to do interesting combinations :
Do standard tracing with LTTng and, eventually, to compute statistics
with SystemTAP, or to have a special trigger on an event that would call
a systemtap script which would stop flight recorder tracing.Signed-off-by: Mathieu Desnoyers
Cc: Christoph Hellwig
Cc: Mike Mason
Cc: Dipankar Sarma
Cc: David Smith
Cc: "Paul E. McKenney"
Cc: "Frank Ch. Eigler"
Cc: Steven Rostedt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Jan, 2008
2 commits
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This is a more complex example showing how to create a kset and a ktype
and some default attributes for a group of kobjects.Cc: Kay Sievers
Signed-off-by: Greg Kroah-Hartman -
This is a simple kobject module, showing how to use kobj_attributes in
basic and more complex ways.Cc: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
15 Nov, 2007
1 commit
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Add the field names to marker example format string.
Signed-off-by: Mathieu Desnoyers
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Oct, 2007
2 commits
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Module example showing how to use the Linux Kernel Markers.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Mathieu Desnoyers
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Begin infrastructure for kernel code samples in the samples/ directory.
Add its Kconfig and Kbuild files.
Source its Kconfig file in all arch/ Kconfigs.Signed-off-by: Randy Dunlap
Signed-off-by: Mathieu Desnoyers
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds