From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:3201:214:fdff:fe10:1be6]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 40BDhN2zz0zF2Lt for ; Thu, 29 Mar 2018 04:02:28 +1100 (AEDT) Date: Wed, 28 Mar 2018 17:48:14 +0100 From: Russell King - ARM Linux To: Rob Landley Cc: Shea Levy , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Richard Henderson , Ivan Kokshaysky , Matt Turner , Vineet Gupta , Catalin Marinas , Will Deacon , Mark Salter , Aurelien Jacquiot , Mikael Starvik , Jesper Nilsson , Yoshinori Sato , Richard Kuo , Tony Luck , Fenghua Yu , Geert Uytterhoeven , James Hogan , Michal Simek , Ralf Baechle , David Howells , Ley Foon Tan , Jonas Bonn , Stefan Kristiansson , Stafford Horne , "James E.J. Bottomley" , Helge Deller , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Palmer Dabbelt , Albert Ou , Martin Schwidefsky , Heiko Carstens , Chen Liqin , Lennox Wu , Rich Felker , "David S. Miller" , Jeff Dike , Richard Weinberger , Guan Xuetao , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, Chris Zankel , Max Filippov , Kate Stewart , Greg Kroah-Hartman , Philippe Ombredanne , Eugeniy Paltsev , Al Viro , Vladimir Murzin , Linus Walleij , Michal Hocko , Andrew Morton , Sudip Mukherjee , Marc Zyngier , Rob Herring , Kees Cook , Vlastimil Babka , Balbir Singh , Christophe Leroy , Joe Perches , Oliver O'Halloran , Dan Williams , Wei Yang , Christian =?iso-8859-1?Q?K=F6nig?= , Arnd Bergmann , Deepa Dinamani , Daniel Thompson , Florian Fainelli , linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, adi-buildroot-devel@lists.sourceforge.net, linux-c6x-dev@linux-c6x.org, linux-cris-kernel@axis.com, uclinux-h8-devel@lists.sourceforge.jp, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-metag@vger.kernel.org, linux-mips@linux-mips.org, linux-am33-list@redhat.com, nios2-dev@lists.rocketboards.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, user-mode-linux-user@lists.sourceforge.net, linux-xtensa@linux-xtensa.org Subject: Re: [PATCH] Extract initrd free logic from arch-specific code. Message-ID: <20180328164813.GA3888@n2100.armlinux.org.uk> References: <20180325221853.10839-1-shea@shealevy.com> <20180328152714.6103-1-shea@shealevy.com> <05620fee-e8b5-0668-77b8-da073dc78c40@landley.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <05620fee-e8b5-0668-77b8-da073dc78c40@landley.net> Sender: Russell King - ARM Linux List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, Mar 28, 2018 at 10:58:51AM -0500, Rob Landley wrote: > On 03/28/2018 10:26 AM, Shea Levy wrote: > > Now only those architectures that have custom initrd free requirements > > need to define free_initrd_mem. > ... > > --- a/arch/arc/mm/init.c > > +++ b/arch/arc/mm/init.c > > @@ -229,10 +229,3 @@ void __ref free_initmem(void) > > { > > free_initmem_default(-1); > > } > > - > > -#ifdef CONFIG_BLK_DEV_INITRD > > -void __init free_initrd_mem(unsigned long start, unsigned long end) > > -{ > > - free_reserved_area((void *)start, (void *)end, -1, "initrd"); > > -} > > -#endif > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > > index 3f972e83909b..19d1c5594e2d 100644 > > --- a/arch/arm/Kconfig > > +++ b/arch/arm/Kconfig > > @@ -47,6 +47,7 @@ config ARM > > select HARDIRQS_SW_RESEND > > select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) > > select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 > > + select HAVE_ARCH_FREE_INITRD_MEM > > select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU > > select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU > > select HAVE_ARCH_MMAP_RND_BITS if MMU > > Isn't this why weak symbols were invented? Weak symbols means that we end up with both the weakly-referenced code and the arch code in the kernel image. That's fine if the weak code is small. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up According to speedtest.net: 8.21Mbps down 510kbps up