From: Florian Fainelli <f.fainelli@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: "open list:MIPS" <linux-mips@linux-mips.org>,
Alan Kao <alankao@andestech.com>,
"open list:SUPERH" <linux-sh@vger.kernel.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Will Deacon <will.deacon@arm.com>,
Paul Mackerras <paulus@samba.org>,
"open list:GENERIC INCLUDE/ASM HEADER FILES"
<linux-arch@vger.kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Matt Turner <mattst88@gmail.com>,
"moderated list:H8/300 ARCHITECTURE"
<uclinux-h8-devel@lists.sourceforge.jp>,
Marc Zyngier <marc.zyngier@arm.com>,
"open list:USER-MODE LINUX UML" <linux-um@lists.infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Richard Henderson <rth@twiddle.net>,
Matt Redfearn <matt.redfearn@mips.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ralf
Subject: [PATCH 0/2] arm64: Cut rebuild time when changing CONFIG_BLK_DEV_INITRD
Date: Tue, 23 Oct 2018 16:40:41 -0700 [thread overview]
Message-ID: <20181023234044.1138-1-f.fainelli@gmail.com> (raw)
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
next reply other threads:[~2018-10-23 23:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-23 23:40 Florian Fainelli [this message]
2018-10-23 23:40 ` [PATCH 1/2] arch: Add asm-generic/initrd.h and make use of it for most architectures Florian Fainelli
2018-10-23 23:40 ` [PATCH 2/2] arm64: Create asm/initrd.h Florian Fainelli
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