linux-kernel - Re: [PATCH 2/3] tracing: add TRACE_ITER_PRINTK flag check in __trace_puts/__trace

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Date:	Wed, 9 Jul 2014 15:22:16 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] tracing: add TRACE_ITER_PRINTK flag check in
 __trace_puts/__trace_bputs

On Thu, 18 Jul 2013 16:31:18 +0800
"zhangwei(Jovi)" <jovi.zhangwei@...wei.com> wrote:

> There missed TRACE_ITER_PRINTK check in __trace_puts/__trace_bputs,
> so add it, to constant with __trace_printk/__trace_bprintk,
> those functions mainly called by same function: trace_printk.

Looks good, I'll add this to my 3.17 queue too.

-- Steve

> 
> Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@...wei.com>
> ---
>  kernel/trace/trace.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index 4d70cc5..41340c3 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -365,6 +365,9 @@ 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();
> 
>  	alloc = sizeof(*entry) + size + 2; /* possible \n added */
> @@ -409,6 +412,9 @@ 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();
> 
>  	local_save_flags(irq_flags);

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