linux-kernel - Re: [PATCH V2 -tip 3/4] Tracing/ftrace: Adapt mmiotrace to the new type of print

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Date:	Wed, 1 Oct 2008 10:06:19 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, Pekka Paalanen <pq@....fi>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 -tip 3/4] Tracing/ftrace: Adapt mmiotrace to the new
	type of print_line


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> Subject: [PATCH -tip] Tracing/ftrace: correct return value of trace_empty
> 
> Correct the value's type of trace_empty function
> 
> Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
> ---
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index 6a1c76b..da3789d 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -1686,7 +1686,7 @@ static int trace_empty(struct trace_iterator *iter)
>  		if (!ring_buffer_iter_empty(iter->buffer_iter[cpu]))
>  			return 0;
>  	}
> -	return TRACE_TYPE_HANDLED;
> +	return 1;

applied the commit below to tip/tracing/ring-buffer, thanks Frederic! 
(had to do manual merging due to flux in that function due to the 
locking changes - please double-check that i got it right.)

btw., we still have the mmiotrace type casting buglet unfixed:

> > >   struct trace_entry *entry = iter->ent;
> > > - struct mmiotrace_map *m = &entry->field.mmiomap;
> > > + struct mmiotrace_map *m = (struct mmiotrace_map *)entry;

	Ingo

------------>
>From a2e221682b91ff83dc8a5e7fbb60a9d87a4e83f2 Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@...il.com>
Date: Tue, 30 Sep 2008 18:13:45 +0200
Subject: [PATCH] tracing/ftrace: Adapt mmiotrace to the new type of print_line, fix

Correct the value's type of trace_empty function

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/trace/trace.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index b542f88..c163406 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1750,7 +1750,7 @@ static int trace_empty(struct trace_iterator *iter)
 		}
 	}
 
-	return TRACE_TYPE_HANDLED;
+	return 1;
 }
 
 static enum print_line_t print_trace_line(struct trace_iterator *iter)
--
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