linux-kernel - [PATCH 3.13 139/259] tracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace

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Date:	Fri,  8 Aug 2014 13:39:22 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 139/259] tracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace_bputs

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

------------------

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

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: Kamal Mostafa <kamal@...onical.com>
---
 kernel/trace/trace.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d3db296..83cb797 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -456,6 +456,9 @@ 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))
@@ -503,6 +506,9 @@ 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))
-- 
1.9.1

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