From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Fainelli Subject: [PATCH 0/2] arm64: Cut rebuild time when changing CONFIG_BLK_DEV_INITRD Date: Tue, 23 Oct 2018 16:40:41 -0700 Message-ID: <20181023234044.1138-1-f.fainelli@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+gla-linux-snps-arc=m.gmane.org@lists.infradead.org To: linux-kernel@vger.kernel.org Cc: "open list:MIPS" , Alan Kao , "open list:SUPERH" , Benjamin Herrenschmidt , Will Deacon , Paul Mackerras , "open list:GENERIC INCLUDE/ASM HEADER FILES" , Michael Ellerman , "James E.J. Bottomley" , Geert Uytterhoeven , Catalin Marinas , Matt Turner , "moderated list:H8/300 ARCHITECTURE" , Marc Zyngier , "open list:USER-MODE LINUX UML" , Thomas Gleixner , Richard Henderson , Matt Redfearn , Greg Kroah-Hartman , Ralf List-Id: devicetree@vger.kernel.org Hi all, While investigating why ARM64 required a ton of objects to be rebuilt when toggling CONFIG_DEV_BLK_INITRD, it became clear that this was because we define __early_init_dt_declare_initrd() differently and we do that in arch/arm64/include/asm/memory.h which gets included by a fair amount of other header files, and translation units as well. This patch series proposes adding an empty initrd.h to satisfy the need for drivers/of/fdt.c to unconditionally include that file, and moves the custom __early_init_dt_declare_initrd() definition away from asm/memory.h This cuts the number of objects rebuilds from 1920 down to 26, so a factor 73 approximately. Apologies for the long CC list, please let me know how you would go about merging that and if another approach would be preferable, e.g: introducing a CONFIG_ARCH_INITRD_BELOW_START_OK Kconfig option or something like that. Florian Fainelli (2): arch: Add asm-generic/initrd.h and make use of it for most architectures arm64: Create asm/initrd.h arch/alpha/include/asm/Kbuild | 1 + arch/arc/include/asm/Kbuild | 1 + arch/arm/include/asm/Kbuild | 1 + arch/arm64/include/asm/initrd.h | 13 +++++++++++++ arch/arm64/include/asm/memory.h | 8 -------- arch/c6x/include/asm/Kbuild | 1 + arch/h8300/include/asm/Kbuild | 1 + arch/hexagon/include/asm/Kbuild | 1 + arch/ia64/include/asm/Kbuild | 1 + arch/m68k/include/asm/Kbuild | 1 + arch/microblaze/include/asm/Kbuild | 1 + arch/mips/include/asm/Kbuild | 1 + arch/nds32/include/asm/Kbuild | 1 + arch/nios2/include/asm/Kbuild | 1 + arch/openrisc/include/asm/Kbuild | 1 + arch/parisc/include/asm/Kbuild | 1 + arch/powerpc/include/asm/Kbuild | 1 + arch/riscv/include/asm/Kbuild | 1 + arch/s390/include/asm/Kbuild | 1 + arch/sh/include/asm/Kbuild | 1 + arch/sparc/include/asm/Kbuild | 1 + arch/um/include/asm/Kbuild | 1 + arch/unicore32/include/asm/Kbuild | 1 + arch/x86/include/asm/Kbuild | 1 + arch/xtensa/include/asm/Kbuild | 1 + drivers/of/fdt.c | 1 + include/asm-generic/initrd.h | 1 + 27 files changed, 38 insertions(+), 8 deletions(-) create mode 100644 arch/arm64/include/asm/initrd.h create mode 100644 include/asm-generic/initrd.h -- 2.17.1