linux-kernel - [PATCH v11 1/3] arm: arm64: introduce CONFIG_HAVE_MEMBLOCK_PFN

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Message-Id: <1534907237-2982-2-git-send-email-jia.he@hxt-semitech.com>
Date:   Wed, 22 Aug 2018 11:07:15 +0800
From:   Jia He <hejianet@...il.com>
To:     Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>
Cc:     Wei Yang <richard.weiyang@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Laura Abbott <labbott@...hat.com>,
        Vladimir Murzin <vladimir.murzin@....com>,
        Philip Derrin <philip@....systems>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        James Morse <james.morse@....com>,
        Steve Capper <steve.capper@....com>,
        Gioh Kim <gi-oh.kim@...fitbricks.com>,
        Vlastimil Babka <vbabka@...e.cz>, Mel Gorman <mgorman@...e.de>,
        Johannes Weiner <hannes@...xchg.org>,
        Kemi Wang <kemi.wang@...el.com>,
        Petr Tesarik <ptesarik@...e.com>,
        YASUAKI ISHIMATSU <yasu.isimatu@...il.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Nikolay Borisov <nborisov@...e.com>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        Daniel Vacek <neelx@...hat.com>,
        Eugeniu Rosca <erosca@...adit-jv.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Jia He <jia.he@...-semitech.com>
Subject: [PATCH v11 1/3] arm: arm64: introduce CONFIG_HAVE_MEMBLOCK_PFN_VALID

Make CONFIG_HAVE_MEMBLOCK_PFN_VALID a new config option so it can move
memblock_next_valid_pfn to generic code file. All the latter optimizations
are based on this config.

The memblock initialization time on arm/arm64 can benefit from this.

Signed-off-by: Jia He <jia.he@...-semitech.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@...cle.com>
---
 arch/arm/Kconfig   | 1 +
 arch/arm64/Kconfig | 1 +
 mm/Kconfig         | 3 +++
 3 files changed, 5 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 843edfd..d3c7705 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1641,6 +1641,7 @@ config ARCH_SELECT_MEMORY_MODEL
 
 config HAVE_ARCH_PFN_VALID
 	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
+	select HAVE_MEMBLOCK_PFN_VALID
 
 config HAVE_GENERIC_GUP
 	def_bool y
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 42c090c..d4119e6 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -777,6 +777,7 @@ config ARCH_SELECT_MEMORY_MODEL
 
 config HAVE_ARCH_PFN_VALID
 	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
+	select HAVE_MEMBLOCK_PFN_VALID
 
 config HW_PERF_EVENTS
 	def_bool y
diff --git a/mm/Kconfig b/mm/Kconfig
index 94af022..28fcf54 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -137,6 +137,9 @@ config HAVE_MEMBLOCK_NODE_MAP
 config HAVE_MEMBLOCK_PHYS_MAP
 	bool
 
+config HAVE_MEMBLOCK_PFN_VALID
+	bool
+
 config HAVE_GENERIC_GUP
 	bool
 
-- 
1.8.3.1