linux-kernel - [PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace

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Message-Id: <1437534782-21737-1-git-send-email-mhuang@redhat.com>
Date:	Wed, 22 Jul 2015 11:13:02 +0800
From:	Minfei Huang <mhuang@...hat.com>
To:	rostedt@...dmis.org, mingo@...hat.com, tglx@...utronix.de,
	hpa@...or.com
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Minfei Huang <mnfhuang@...il.com>
Subject: [PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace

From: Minfei Huang <mnfhuang@...il.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.

Signed-off-by: Minfei Huang <mnfhuang@...il.com>
---
 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 8b7b0a5..311bcf3 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();
-- 
2.4.0

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