From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756230Ab0ELPam (ORCPT ); Wed, 12 May 2010 11:30:42 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:40965 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755404Ab0ELP2z (ORCPT ); Wed, 12 May 2010 11:28:55 -0400 X-Authority-Analysis: v=1.1 cv=RZg5C6NCKrCZril9sGGnsuGk01/OiP2z3O3lo0hXATg= c=1 sm=0 a=yHDzWP9yDjQA:10 a=yQWWgrYGNuUA:10 a=GzHTLUccyWwA:10 a=gMqfjgEr1zLu/65IO0LwxA==:17 a=7d_E57ReAAAA:8 a=meVymXHHAAAA:8 a=Z4Rwk6OoAAAA:8 a=JfrnYn6hAAAA:8 a=pGLkceISAAAA:8 a=20KFwNOVAAAA:8 a=omOdbC7AAAAA:8 a=iRrFxeVTYHbQNZdbrRgA:9 a=MdYbQJTnQu1bAF1be6EA:7 a=BVPYyhIVMf1ixIfLdVWZlY1mS4AA:4 a=D6-X0JM3zdQA:10 a=jeBq3FmKZ4MA:10 a=jbrJJM5MRmoA:10 a=Zh68SRI7RUMA:10 a=3Rfx1nUSh_UA:10 a=MSl-tDqOz04A:10 a=jEp0ucaQiEUA:10 a=oUQuMaGMe1cA:10 a=gMqfjgEr1zLu/65IO0LwxA==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.89.75 Message-Id: <20100512152852.677277744@goodmis.org> User-Agent: quilt/0.48-1 Date: Wed, 12 May 2010 11:28:12 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Thomas Gleixner , Peter Zijlstra , Frederic Weisbecker , Arnaldo Carvalho de Melo , Mathieu Desnoyers , Lai Jiangshan , Li Zefan , Masami Hiramatsu , Christoph Hellwig , Mathieu Desnoyers Subject: [PATCH 02/10 final] tracepoints: Add check trace callback type References: <20100512152810.819338250@goodmis.org> Content-Disposition: inline; filename=0002-tracepoints-Add-check-trace-callback-type.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mathieu Desnoyers This check is meant to be used by tracepoint users which do a direct cast of callbacks to (void *) for direct registration, thus bypassing the register_trace_##name and unregister_trace_##name checks. This permits to ensure that the callback type matches the function type at the call site, but without generating any code. Signed-off-by: Mathieu Desnoyers LKML-Reference: <20100430165959.GA25605@Krystal> CC: Steven Rostedt CC: Ingo Molnar CC: Andrew Morton CC: Thomas Gleixner CC: Peter Zijlstra CC: Frederic Weisbecker CC: Arnaldo Carvalho de Melo CC: Lai Jiangshan CC: Li Zefan CC: Masami Hiramatsu CC: Christoph Hellwig Signed-off-by: Steven Rostedt --- include/linux/tracepoint.h | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 1d85f9a..8d5e4f6 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -137,9 +137,11 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin, static inline int unregister_trace_##name(void (*probe)(proto)) \ { \ return tracepoint_probe_unregister(#name, (void *)probe);\ + } \ + static inline void check_trace_callback_type_##name(void (*cb)(proto)) \ + { \ } - #define DEFINE_TRACE_FN(name, reg, unreg) \ static const char __tpstrtab_##name[] \ __attribute__((section("__tracepoints_strings"))) = #name; \ @@ -168,6 +170,9 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin, static inline int unregister_trace_##name(void (*probe)(proto)) \ { \ return -ENOSYS; \ + } \ + static inline void check_trace_callback_type_##name(void (*cb)(proto)) \ + { \ } #define DEFINE_TRACE_FN(name, reg, unreg) -- 1.7.0