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tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()

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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 <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Mathieu Desnoyers 2008-11-14 17:47:47 -05:00 • committed by Ingo Molnar
commit 7e066fb870
11 changed files with 66 additions and 25 deletions
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2
kernel/signal.c
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@ -41,6 +41,8 @@
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;