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author | Steven Rostedt <srostedt@redhat.com> | 2009-04-10 15:36:00 +0200 |
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committer | Steven Rostedt <rostedt@goodmis.org> | 2009-04-14 18:57:28 +0200 |
commit | a8d154b009168337494fbf345671bab74d3e4b8b (patch) | |
tree | 4097612e1a5cc8bf7658542f7d0f51b815113eaf /mm | |
parent | tracing: consolidate trace and trace_event headers (diff) | |
download | linux-a8d154b009168337494fbf345671bab74d3e4b8b.tar.xz linux-a8d154b009168337494fbf345671bab74d3e4b8b.zip |
tracing: create automated trace defines
This patch lowers the number of places a developer must modify to add
new tracepoints. The current method to add a new tracepoint
into an existing system is to write the trace point macro in the
trace header with one of the macros TRACE_EVENT, TRACE_FORMAT or
DECLARE_TRACE, then they must add the same named item into the C file
with the macro DEFINE_TRACE(name) and then add the trace point.
This change cuts out the needing to add the DEFINE_TRACE(name).
Every file that uses the tracepoint must still include the trace/<type>.h
file, but the one C file must also add a define before the including
of that file.
#define CREATE_TRACE_POINTS
#include <trace/mytrace.h>
This will cause the trace/mytrace.h file to also produce the C code
necessary to implement the trace point.
Note, if more than one trace/<type>.h is used to create the C code
it is best to list them all together.
#define CREATE_TRACE_POINTS
#include <trace/foo.h>
#include <trace/bar.h>
#include <trace/fido.h>
Thanks to Mathieu Desnoyers and Christoph Hellwig for coming up with
the cleaner solution of the define above the includes over my first
design to have the C code include a "special" header.
This patch converts sched, irq and lockdep and skb to use this new
method.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'mm')
-rw-r--r-- | mm/util.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/mm/util.c b/mm/util.c index 2599e83eea17..0e74a22791cb 100644 --- a/mm/util.c +++ b/mm/util.c @@ -4,9 +4,11 @@ #include <linux/module.h> #include <linux/err.h> #include <linux/sched.h> -#include <linux/tracepoint.h> #include <asm/uaccess.h> +#define CREATE_TRACE_POINTS +#include <trace/kmem.h> + /** * kstrdup - allocate space for and copy an existing string * @s: the string to duplicate @@ -239,13 +241,6 @@ int __attribute__((weak)) get_user_pages_fast(unsigned long start, EXPORT_SYMBOL_GPL(get_user_pages_fast); /* Tracepoints definitions. */ -DEFINE_TRACE(kmalloc); -DEFINE_TRACE(kmem_cache_alloc); -DEFINE_TRACE(kmalloc_node); -DEFINE_TRACE(kmem_cache_alloc_node); -DEFINE_TRACE(kfree); -DEFINE_TRACE(kmem_cache_free); - EXPORT_TRACEPOINT_SYMBOL(kmalloc); EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc); EXPORT_TRACEPOINT_SYMBOL(kmalloc_node); |