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Date: Thu, 21 Jul 2011 10:01:36 GMT
From: tip-bot for Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, acme@...hat.com, hpa@...or.com,
mingo@...hat.com, peterz@...radead.org,
masami.hiramatsu.pt@...achi.com, fweisbec@...il.com,
rostedt@...dmis.org, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/core] tracing/kprobes: Merge trace probe enable/disable functions
Commit-ID: 1538f888f1e793de04e0f90372352ac1b05833cf
Gitweb: http://git.kernel.org/tip/1538f888f1e793de04e0f90372352ac1b05833cf
Author: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
AuthorDate: Mon, 27 Jun 2011 16:26:44 +0900
Committer: Steven Rostedt <rostedt@...dmis.org>
CommitDate: Fri, 15 Jul 2011 15:10:58 -0400
tracing/kprobes: Merge trace probe enable/disable functions
Merge redundant enable/disable functions into enable_trace_probe()
and disable_trace_probe().
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: yrl.pp-manager.tt@...achi.com
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
Link: http://lkml.kernel.org/r/20110627072644.6528.26910.stgit@fedora15
[ converted kprobe selftest to use enable_trace_probe ]
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
kernel/trace/trace_kprobe.c | 92 +++++++++++++++++--------------------------
1 files changed, 36 insertions(+), 56 deletions(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 14b88ed..3be50c5 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -683,6 +683,34 @@ static struct trace_probe *find_trace_probe(const char *event,
return NULL;
}
+/* Enable trace_probe - @flag must be TP_FLAG_TRACE or TP_FLAG_PROFILE */
+static int enable_trace_probe(struct trace_probe *tp, int flag)
+{
+ int ret = 0;
+
+ tp->flags |= flag;
+ if (tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE)) {
+ if (trace_probe_is_return(tp))
+ ret = enable_kretprobe(&tp->rp);
+ else
+ ret = enable_kprobe(&tp->rp.kp);
+ }
+
+ return ret;
+}
+
+/* Disable trace_probe - @flag must be TP_FLAG_TRACE or TP_FLAG_PROFILE */
+static void disable_trace_probe(struct trace_probe *tp, int flag)
+{
+ tp->flags &= ~flag;
+ if (!(tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE))) {
+ if (trace_probe_is_return(tp))
+ disable_kretprobe(&tp->rp);
+ else
+ disable_kprobe(&tp->rp.kp);
+ }
+}
+
/* Unregister a trace_probe and probe_event: call with locking probe_lock */
static void unregister_trace_probe(struct trace_probe *tp)
{
@@ -1514,30 +1542,6 @@ partial:
return TRACE_TYPE_PARTIAL_LINE;
}
-static int probe_event_enable(struct ftrace_event_call *call)
-{
- struct trace_probe *tp = (struct trace_probe *)call->data;
-
- tp->flags |= TP_FLAG_TRACE;
- if (trace_probe_is_return(tp))
- return enable_kretprobe(&tp->rp);
- else
- return enable_kprobe(&tp->rp.kp);
-}
-
-static void probe_event_disable(struct ftrace_event_call *call)
-{
- struct trace_probe *tp = (struct trace_probe *)call->data;
-
- tp->flags &= ~TP_FLAG_TRACE;
- if (!(tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE))) {
- if (trace_probe_is_return(tp))
- disable_kretprobe(&tp->rp);
- else
- disable_kprobe(&tp->rp.kp);
- }
-}
-
#undef DEFINE_FIELD
#define DEFINE_FIELD(type, item, name, is_signed) \
do { \
@@ -1716,49 +1720,25 @@ static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri,
head = this_cpu_ptr(call->perf_events);
perf_trace_buf_submit(entry, size, rctx, entry->ret_ip, 1, regs, head);
}
-
-static int probe_perf_enable(struct ftrace_event_call *call)
-{
- struct trace_probe *tp = (struct trace_probe *)call->data;
-
- tp->flags |= TP_FLAG_PROFILE;
-
- if (trace_probe_is_return(tp))
- return enable_kretprobe(&tp->rp);
- else
- return enable_kprobe(&tp->rp.kp);
-}
-
-static void probe_perf_disable(struct ftrace_event_call *call)
-{
- struct trace_probe *tp = (struct trace_probe *)call->data;
-
- tp->flags &= ~TP_FLAG_PROFILE;
-
- if (!(tp->flags & TP_FLAG_TRACE)) {
- if (trace_probe_is_return(tp))
- disable_kretprobe(&tp->rp);
- else
- disable_kprobe(&tp->rp.kp);
- }
-}
#endif /* CONFIG_PERF_EVENTS */
static __kprobes
int kprobe_register(struct ftrace_event_call *event, enum trace_reg type)
{
+ struct trace_probe *tp = (struct trace_probe *)event->data;
+
switch (type) {
case TRACE_REG_REGISTER:
- return probe_event_enable(event);
+ return enable_trace_probe(tp, TP_FLAG_TRACE);
case TRACE_REG_UNREGISTER:
- probe_event_disable(event);
+ disable_trace_probe(tp, TP_FLAG_TRACE);
return 0;
#ifdef CONFIG_PERF_EVENTS
case TRACE_REG_PERF_REGISTER:
- return probe_perf_enable(event);
+ return enable_trace_probe(tp, TP_FLAG_PROFILE);
case TRACE_REG_PERF_UNREGISTER:
- probe_perf_disable(event);
+ disable_trace_probe(tp, TP_FLAG_PROFILE);
return 0;
#endif
}
@@ -1905,7 +1885,7 @@ static __init int kprobe_trace_self_tests_init(void)
pr_warning("error on getting new probe.\n");
warn++;
} else
- probe_event_enable(&tp->call);
+ enable_trace_probe(tp, TP_FLAG_TRACE);
}
ret = command_trace_probe("r:testprobe2 kprobe_trace_selftest_target "
@@ -1920,7 +1900,7 @@ static __init int kprobe_trace_self_tests_init(void)
pr_warning("error on getting new probe.\n");
warn++;
} else
- probe_event_enable(&tp->call);
+ enable_trace_probe(tp, TP_FLAG_TRACE);
}
if (warn)
--
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