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Date: Mon, 9 Mar 2009 22:20:33 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>,
       Peter Zijlstra <peterz@infradead.org>,
       Frederic Weisbecker <fweisbec@gmail.com>, Theodore Tso <tytso@mit.edu>,
       Arnaldo Carvalho de Melo <acme@redhat.com>,
       "H. Peter Anvin" <hpa@zytor.com>,
       Mathieu Desnoyers <compudj@krystal.dyndns.org>,
       Lai Jiangshan <laijs@cn.fujitsu.com>,
       "Martin J. Bligh" <mbligh@mbligh.org>,
       "Frank Ch. Eigler" <fche@redhat.com>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Larry Woodman <lwoodman@redhat.com>, Jason Baron <jbaron@redhat.com>,
       Tom Zanussi <tzanussi@gmail.com>,
       Masami Hiramatsu <mhiramat@redhat.com>,
       Christoph Hellwig <hch@infradead.org>,
       Jiaying Zhang <jiayingz@google.com>,
       Steven Rostedt <srostedt@redhat.com>
Subject: Re: [PATCH 1/7] tracing: typecast sizeof and offsetof to unsigned
 int
Message-Id: <20090309222033.d39c7b22.akpm@linux-foundation.org>
In-Reply-To: <20090310045810.602528682@goodmis.org>
References: <20090310045710.286915983@goodmis.org>
	<20090310045810.602528682@goodmis.org>
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On Tue, 10 Mar 2009 00:57:11 -0400 Steven Rostedt <rostedt@goodmis.org> wrote:

> On x86_64 sizeof and offsetof are treated as long, where as on x86_32
> they are int. This patch typecasts them to unsigned int to avoid
> one arch giving warnings while the other does not.

Actually, both have type size_t.

>  static int trace_write_header(struct trace_seq *s)
>  {
> @@ -457,11 +458,11 @@ static int trace_write_header(struct trace_seq *s)
>  
>  	/* struct trace_entry */
>  	return trace_seq_printf(s,
> -				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
> -				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
> -				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
> -				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
> -				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
> +				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
> +				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
> +				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
> +				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
> +				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"

Which may be printed with %z.