linux-kernel - [PATCH 3.12 22/94] tracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace

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Message-Id: <e12331d98e5726a6a0597eac8853d9408bae5a12.1406722270.git.jslaby@suse.cz>
Date:	Wed, 30 Jul 2014 14:14:11 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 22/94] tracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace_bputs

From: "zhangwei(Jovi)" <jovi.zhangwei@...wei.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f0160a5a2912267c02cfe692eac955c360de5fdf upstream.

The TRACE_ITER_PRINTK check in __trace_puts/__trace_bputs is missing,
so add it, to be consistent with __trace_printk/__trace_bprintk.
Those functions are all called by the same function: trace_printk().

Link: http://lkml.kernel.org/p/51E7A7D6.8090900@huawei.com

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@...wei.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 kernel/trace/trace.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 952cde4d4e3c..b7566fe4d607 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -436,6 +436,9 @@ int __trace_puts(unsigned long ip, const char *str, int size)
 	int alloc;
 	int pc;
 
+	if (!(trace_flags & TRACE_ITER_PRINTK))
+		return 0;
+
 	pc = preempt_count();
 
 	if (unlikely(tracing_selftest_running || tracing_disabled))
@@ -483,6 +486,9 @@ int __trace_bputs(unsigned long ip, const char *str)
 	int size = sizeof(struct bputs_entry);
 	int pc;
 
+	if (!(trace_flags & TRACE_ITER_PRINTK))
+		return 0;
+
 	pc = preempt_count();
 
 	if (unlikely(tracing_selftest_running || tracing_disabled))
-- 
2.0.1

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