From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from biscayne-one-station.mit.edu (BISCAYNE-ONE-STATION.MIT.EDU [18.7.7.80]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 1341BDDEE3 for ; Fri, 1 May 2009 06:14:14 +1000 (EST) From: Tim Abbott To: Sam Ravnborg Subject: [PATCH v2 0/6] macros for section name cleanup Date: Thu, 30 Apr 2009 15:54:07 -0400 Message-Id: <1241121253-32341-1-git-send-email-tabbott@mit.edu> Cc: linux-mips@linux-mips.org, linux-m68k@vger.kernel.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Denys Vlasenko , Greg Ungerer , Jeff Arnold , linuxppc-dev@ozlabs.org, Paul Mackerras , "H. Peter Anvin" , sparclinux@vger.kernel.org, Waseem Daher , linux-s390@vger.kernel.org, Jesper Nilsson , Yoshinori Sato , Helge Deller , Ingo Molnar , Geert Uytterhoeven , microblaze-uclinux@itee.uq.edu.au, Russell King , user-mode-linux-devel@lists.sourceforge.net, Heiko Carstens , Jeff Dike , dev-etrax@axis.com, Mikael Starvik , Tim Abbott , Cyrill Gorcunov , Michal Simek , Richard Henderson , Chris Zankel , Bryan Wu , Tony Luck , linux-parisc@vger.kernel.org, Haavard Skinnemoen , Hirokazu Takata , Linux kernel mailing list , Ralf Baechle , Anders Kaseorg , Kyle McMartin , Paul Mundt , Thomas Gleixner , linux-alpha@vger.kernel.org, Martin Schwidefsky , uclinux-dist-devel@blackfin.uclinux.org, Linus Torvalds , "David S. Miller" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , (this patch series differs from v1 only in the CC list; some of the architecture lists I sent the previous one to are moderated against non-members; all replies should go to this version). Here are the architecture-independent macro definitions needed for to clean up the kernel's section names. The overall diffstat from this section name cleanup project is: 96 files changed, 261 insertions(+), 503 deletions(-) The decrease results from removing a lot of redundancy in the linker scripts. The long-term goal here is to add support for building the kernel with -ffunction-sections -fdata-sections. This requires renaming all the magic section names in the kernel of the form .text.foo, .data.foo, .bss.foo, and .rodata.foo to not have collisions with sections generated for code like: static int nosave = 0; /* -fdata-sections places in .data.nosave */ static void head(); /* -ffunction-sections places in .text.head */ Sam Ravnborg proposed that rather than just renaming all the sections outright, we should start by first getting more control over the section names used in the kernel so that we can later rename sections without touching too many files. These patch series implement that cleanup. Later, there will be another patch series to actually rename the sections. I'm hoping we can get just these macro definitions into 2.6.30 so that the arch maintainers don't have to grab the macro definitions for their trees while reviewing the patches for 2.6.31. Shortly, I'm going to send one patch series for each of the architectures updating those architectures to use these new macros (and otherwise cleaning up section names on those architectures). -Tim Abbott Tim Abbott (6): Add new macros for page-aligned data and bss sections. Add new NOSAVE_DATA linker script macro. Add new CACHELINE_ALIGNED_DATA linker script macro. Add new INIT_TASK_DATA() linker script macro. Add new READ_MOSTLY_DATA(align) linker script macro. Add support for __read_mostly to linux/cache.h include/asm-generic/vmlinux.lds.h | 27 +++++++++++++++++++++++++++ include/linux/cache.h | 6 ++++++ include/linux/init_task.h | 3 +++ include/linux/linkage.h | 9 +++++++++ 4 files changed, 45 insertions(+), 0 deletions(-)