From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753660Ab0JTRtr (ORCPT ); Wed, 20 Oct 2010 13:49:47 -0400 Received: from imr4.ericy.com ([198.24.6.8]:59455 "EHLO imr4.ericy.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751459Ab0JTRtr (ORCPT ); Wed, 20 Oct 2010 13:49:47 -0400 Date: Wed, 20 Oct 2010 10:48:46 -0700 From: Guenter Roeck To: Joe Perches CC: Jean Delvare , Hans de Goede , Alistair John Strachan , Henrik Rydberg , "Mark M. Hoffman" , Luca Tettamanti , Fenghua Yu , Juerg Haefliger , Eric Piel , Jim Cromie , Roger Lucas , "lm-sensors@lm-sensors.org" , LKML Subject: Re: [PATCH] drivers/hwmon: Use pr_fmt and pr_ Message-ID: <20101020174846.GA22819@ericsson.com> References: <1287530020.10409.594.camel@Joe-Laptop> <20101020094208.3136b9dd@endymion.delvare> <1287590363.1813.148.camel@Joe-Laptop> <20101020164929.GB22572@ericsson.com> <1287593660.1813.198.camel@Joe-Laptop> <20101020171806.GD22572@ericsson.com> <1287595700.1813.202.camel@Joe-Laptop> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <1287595700.1813.202.camel@Joe-Laptop> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 20, 2010 at 01:28:20PM -0400, Joe Perches wrote: > On Wed, 2010-10-20 at 10:18 -0700, Guenter Roeck wrote: > > On Wed, Oct 20, 2010 at 12:54:20PM -0400, Joe Perches wrote: > > > On Wed, 2010-10-20 at 09:49 -0700, Guenter Roeck wrote: > > > > On Wed, Oct 20, 2010 at 11:59:23AM -0400, > > > > Joe Perches wrote: > > > > [ ... ] > > > > > Anyway, I'd like to sort it out eventually. > > > > > For now, I just add the #define pr_fmt, with > > > > > a long term goal of removing them all and using > > > > > a different mechanism to remove the duplicated > > > > > prefix string altogether from the formats and > > > > > save some text. > > > > I don't mind individual pr_fmt defines as long as they are used. > > > > However, that is not the case in many of the patches. > > > > Just adding a pr_fmt define to a file without using it doesn't make sense to me. > > > kernel.h has the equivalent of: > > > #define pr_(fmt, arg...) printk(KERN_ pr_fmt(fmt), ##arg) > > > > > And no one minds that there are literally hundreds of equivalent defines > > for pr_fmt in the code, and even more conflicting ones ? Odd. > > > > Maybe the following in kernel.h would make more sense. > > > > #ifndef pr_fmt > > #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt > > #endif > > > > At least it would make more sense than littering source files with pr_fmt definitions. > > If that doesn't fly, I would prefer to stick with the existing default definition in kernel.h. > > That would give you no prefix at all and make the > logging messages harder to distinguish. > Exactly my point. > > At least that would give people an incentive to fix the problem in kernel.h (or in some other > > central location) if they dislike the resulting missing module names. > > I don't think it flies for another year or two. > > $ grep -Prh --include=*.[ch] "define\s*pr_fmt" * | \ > perl -p -e 's/[ \t]+/ /g' | \ > sort | uniq -c | sort -rn > 211 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt > 93 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt > 16 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ > 16 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ > 4 #define pr_fmt(fmt) "intc: " fmt > 4 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt > 3 #define pr_fmt(fmt) "%s: " fmt, __func__ > 3 #define pr_fmt(fmt) DRV_MODULE_NAME ": " fmt > 2 #define pr_fmt(fmt) "gcov: " fmt > 2 #define pr_fmt(fmt) fmt > 2 #define pr_fmt(fmt) DRV_NAME ": " fmt > 1 #define pr_fmt(fmt) "viod: " fmt > 1 #define pr_fmt(fmt) "tboot: " fmt > 1 #define pr_fmt(fmt) "(stll) :" fmt > 1 #define pr_fmt(fmt) "(stk) :" fmt > 1 #define pr_fmt(fmt) "(stc): " fmt > 1 #define pr_fmt(fmt) "PMU: " fmt > 1 #define pr_fmt(fmt) "pit: " fmt > 1 #define pr_fmt(fmt) "phram: " fmt > 1 #define pr_fmt(fmt) "PCI: " fmt > 1 #define pr_fmt(fmt) "module %s: " fmt > 1 #define pr_fmt(fmt) "mmiotrace: " fmt > 1 #define pr_fmt(fmt) KBUILD_MODNAME " WATCHDOG: " fmt > 1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt /* Append 'batman-adv: ' before > 1 #define pr_fmt(fmt) KBUILD_MODNAME " " fmt > 1 #define pr_fmt(fmt) KBUILD_BASENAME ": " fmt > 1 #define pr_fmt(fmt) "isram: " fmt > 1 #define pr_fmt(fmt) "hw perfevents: " fmt > 1 #define pr_fmt(fmt) "hw-breakpoint: " fmt > 1 #define pr_fmt(fmt) DRIVER_NAME ": " fmt > 1 #define pr_fmt(fmt) "cxgb: " fmt > 1 #define pr_fmt(fmt) "cn_test: " fmt > 1 #define pr_fmt(fmt) "clock: " fmt > 1 #define pr_fmt(fmt) "acerhdf: " fmt > The modified define in kernel.org would only apply if pr_fmt isn't already defined, so that argument is not really correct. The real difference would be that you could then remove the individual pr_fmt defines from 211 files, and all users of pr_fmt without module name (ie those hard to read) would be easier to read/identify. Guenter