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[for-next][PATCH 2/2] ftrace: Calculate the correct dyn_ftrace number to report to the userspace

From Steven Rostedt <rostedt@goodmis.org>
Newsgroups linux.kernel
Subject [for-next][PATCH 2/2] ftrace: Calculate the correct dyn_ftrace number to report to the userspace
Date 2015-10-23 14:40 +0200
Message-ID <qmJNx-1va-39@gated-at.bofh.it> (permalink)
References <qmJNx-1va-33@gated-at.bofh.it>
Organization linux.* mail to news gateway

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From: Minfei Huang <mnfhuang@gmail.com>

Now, ftrace only calculate the dyn_ftrace number in the adding
breakpoint loop, not in adding update and finish update loop.

Calculate the correct dyn_ftrace, once ftrace reports the failure message
to the userspace.

Link: http://lkml.kernel.org/r/1442420382-13130-1-git-send-email-mnfhuang@gmail.com

Signed-off-by: Minfei Huang <mnfhuang@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 arch/x86/kernel/ftrace.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 8b7b0a51e742..311bcf338f07 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -556,6 +556,7 @@ void ftrace_replace_code(int enable)
 	run_sync();
 
 	report = "updating code";
+	count = 0;
 
 	for_ftrace_rec_iter(iter) {
 		rec = ftrace_rec_iter_record(iter);
@@ -563,11 +564,13 @@ void ftrace_replace_code(int enable)
 		ret = add_update(rec, enable);
 		if (ret)
 			goto remove_breakpoints;
+		count++;
 	}
 
 	run_sync();
 
 	report = "removing breakpoints";
+	count = 0;
 
 	for_ftrace_rec_iter(iter) {
 		rec = ftrace_rec_iter_record(iter);
@@ -575,6 +578,7 @@ void ftrace_replace_code(int enable)
 		ret = finish_update(rec, enable);
 		if (ret)
 			goto remove_breakpoints;
+		count++;
 	}
 
 	run_sync();
-- 
2.6.1


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Thread

[for-next][PATCH 0/2] tracing: More updates for 4.4 Steven Rostedt <rostedt@goodmis.org> - 2015-10-23 14:40 +0200
  [for-next][PATCH 2/2] ftrace: Calculate the correct dyn_ftrace number to report to the  userspace Steven Rostedt <rostedt@goodmis.org> - 2015-10-23 14:40 +0200
  [for-next][PATCH 1/2] tracing: Remove {start,stop}_branch_trace Steven Rostedt <rostedt@goodmis.org> - 2015-10-23 14:40 +0200

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