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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-11-14 17:47:47 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-16 09:01:36 +0100
commit7e066fb870fcd1025ec3ba7bbde5d541094f4ce1 (patch)
tree52acda06de25c029b9834110d7bf6b4abc50353b /samples
parent32f85742778dfc2c74975cf0b9f5bdb13470cb32 (diff)
downloadlinux-2.6.38-lt-ux500-7e066fb870fcd1025ec3ba7bbde5d541094f4ce1.tar.gz
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
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 <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'samples')
-rw-r--r--samples/tracepoints/tp-samples-trace.h4
-rw-r--r--samples/tracepoints/tracepoint-sample.c3
2 files changed, 5 insertions, 2 deletions
diff --git a/samples/tracepoints/tp-samples-trace.h b/samples/tracepoints/tp-samples-trace.h
index 0216b55bd64..01724e04c55 100644
--- a/samples/tracepoints/tp-samples-trace.h
+++ b/samples/tracepoints/tp-samples-trace.h
@@ -4,10 +4,10 @@
#include <linux/proc_fs.h> /* for struct inode and struct file */
#include <linux/tracepoint.h>
-DEFINE_TRACE(subsys_event,
+DECLARE_TRACE(subsys_event,
TPPROTO(struct inode *inode, struct file *file),
TPARGS(inode, file));
-DEFINE_TRACE(subsys_eventb,
+DECLARE_TRACE(subsys_eventb,
TPPROTO(void),
TPARGS());
#endif
diff --git a/samples/tracepoints/tracepoint-sample.c b/samples/tracepoints/tracepoint-sample.c
index 4ae4b7fcc04..00d169792a3 100644
--- a/samples/tracepoints/tracepoint-sample.c
+++ b/samples/tracepoints/tracepoint-sample.c
@@ -13,6 +13,9 @@
#include <linux/proc_fs.h>
#include "tp-samples-trace.h"
+DEFINE_TRACE(subsys_event);
+DEFINE_TRACE(subsys_eventb);
+
struct proc_dir_entry *pentry_example;
static int my_open(struct inode *inode, struct file *file)