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authorSteven Rostedt <srostedt@redhat.com>2009-04-10 09:36:00 -0400
committerSteven Rostedt <rostedt@goodmis.org>2009-04-14 12:57:28 -0400
commita8d154b009168337494fbf345671bab74d3e4b8b (patch)
tree4097612e1a5cc8bf7658542f7d0f51b815113eaf /kernel
parentea20d9293ce423a39717ed4375393129a2e701f9 (diff)
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 'kernel')
-rw-r--r--kernel/exit.c4
-rw-r--r--kernel/fork.c2
-rw-r--r--kernel/irq/handle.c7
-rw-r--r--kernel/kthread.c3
-rw-r--r--kernel/lockdep.c12
-rw-r--r--kernel/sched.c10
-rw-r--r--kernel/signal.c2
-rw-r--r--kernel/softirq.c3
8 files changed, 9 insertions, 34 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index abf9cf3b95c..2fe9d2c7eee 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -56,10 +56,6 @@
#include <asm/mmu_context.h>
#include "cred-internals.h"
-DEFINE_TRACE(sched_process_free);
-DEFINE_TRACE(sched_process_exit);
-DEFINE_TRACE(sched_process_wait);
-
static void exit_mm(struct task_struct * tsk);
static void __unhash_process(struct task_struct *p)
diff --git a/kernel/fork.c b/kernel/fork.c
index b9e2edd0072..4bebf263923 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -83,8 +83,6 @@ DEFINE_PER_CPU(unsigned long, process_counts) = 0;
__cacheline_aligned DEFINE_RWLOCK(tasklist_lock); /* outer */
-DEFINE_TRACE(sched_process_fork);
-
int nr_processes(void)
{
int cpu;
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index d82142be8dd..983d8be8dff 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -17,9 +17,11 @@
#include <linux/kernel_stat.h>
#include <linux/rculist.h>
#include <linux/hash.h>
-#include <trace/irq.h>
#include <linux/bootmem.h>
+#define CREATE_TRACE_POINTS
+#include <trace/irq.h>
+
#include "internals.h"
/*
@@ -348,9 +350,6 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action)
"but no thread function available.", irq, action->name);
}
-DEFINE_TRACE(irq_handler_entry);
-DEFINE_TRACE(irq_handler_exit);
-
/**
* handle_IRQ_event - irq action chain handler
* @irq: the interrupt number
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 4ebaf8519ab..e1c76924545 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -21,9 +21,6 @@ static DEFINE_SPINLOCK(kthread_create_lock);
static LIST_HEAD(kthread_create_list);
struct task_struct *kthreadd_task;
-DEFINE_TRACE(sched_kthread_stop);
-DEFINE_TRACE(sched_kthread_stop_ret);
-
struct kthread_create_info
{
/* Information passed to kthread() from kthreadd. */
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index c4582a6ea95..257f21a76c5 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -42,12 +42,14 @@
#include <linux/hash.h>
#include <linux/ftrace.h>
#include <linux/stringify.h>
-#include <trace/lockdep.h>
#include <asm/sections.h>
#include "lockdep_internals.h"
+#define CREATE_TRACE_POINTS
+#include <trace/lockdep.h>
+
#ifdef CONFIG_PROVE_LOCKING
int prove_locking = 1;
module_param(prove_locking, int, 0644);
@@ -2929,8 +2931,6 @@ void lock_set_class(struct lockdep_map *lock, const char *name,
}
EXPORT_SYMBOL_GPL(lock_set_class);
-DEFINE_TRACE(lock_acquire);
-
/*
* We are not always called with irqs disabled - do that here,
* and also avoid lockdep recursion:
@@ -2957,8 +2957,6 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
}
EXPORT_SYMBOL_GPL(lock_acquire);
-DEFINE_TRACE(lock_release);
-
void lock_release(struct lockdep_map *lock, int nested,
unsigned long ip)
{
@@ -3061,8 +3059,6 @@ found_it:
put_lock_stats(stats);
}
-DEFINE_TRACE(lock_acquired);
-
static void
__lock_acquired(struct lockdep_map *lock, unsigned long ip)
{
@@ -3118,8 +3114,6 @@ found_it:
lock->ip = ip;
}
-DEFINE_TRACE(lock_contended);
-
void lock_contended(struct lockdep_map *lock, unsigned long ip)
{
unsigned long flags;
diff --git a/kernel/sched.c b/kernel/sched.c
index 5724508c3b6..e6d4518d47e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -72,13 +72,15 @@
#include <linux/debugfs.h>
#include <linux/ctype.h>
#include <linux/ftrace.h>
-#include <trace/sched.h>
#include <asm/tlb.h>
#include <asm/irq_regs.h>
#include "sched_cpupri.h"
+#define CREATE_TRACE_POINTS
+#include <trace/sched.h>
+
/*
* Convert user-nice values [ -20 ... 0 ... 19 ]
* to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
@@ -118,12 +120,6 @@
*/
#define RUNTIME_INF ((u64)~0ULL)
-DEFINE_TRACE(sched_wait_task);
-DEFINE_TRACE(sched_wakeup);
-DEFINE_TRACE(sched_wakeup_new);
-DEFINE_TRACE(sched_switch);
-DEFINE_TRACE(sched_migrate_task);
-
#ifdef CONFIG_SMP
static void double_rq_lock(struct rq *rq1, struct rq *rq2);
diff --git a/kernel/signal.c b/kernel/signal.c
index d8034737db4..1d5703ff003 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -41,8 +41,6 @@
static struct kmem_cache *sigqueue_cachep;
-DEFINE_TRACE(sched_signal_send);
-
static void __user *sig_handler(struct task_struct *t, int sig)
{
return t->sighand->action[sig - 1].sa.sa_handler;
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 2fecefacdc5..a2d9b458ac2 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -186,9 +186,6 @@ EXPORT_SYMBOL(local_bh_enable_ip);
*/
#define MAX_SOFTIRQ_RESTART 10
-DEFINE_TRACE(softirq_entry);
-DEFINE_TRACE(softirq_exit);
-
asmlinkage void __do_softirq(void)
{
struct softirq_action *h;