From fa3354e4ea39e97af906c05551a36396541d70b4 Mon Sep 17 00:00:00 2001
From: Mike Rapoport <rppt@linux.ibm.com>
Date: Wed, 3 Jun 2020 15:57:06 -0700
Subject: mm: free_area_init: use maximal zone PFNs rather than zone sizes

Currently, architectures that use free_area_init() to initialize memory
map and node and zone structures need to calculate zone and hole sizes.
We can use free_area_init_nodes() instead and let it detect the zone
boundaries while the architectures will only have to supply the possible
limits for the zones.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Hoan Tran <hoan@os.amperecomputing.com>	[arm64]
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200412194859.12663-5-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/c6x/mm/init.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

(limited to 'arch/c6x')

diff --git a/arch/c6x/mm/init.c b/arch/c6x/mm/init.c
index 9b374393a8f4..a97e51a3e26d 100644
--- a/arch/c6x/mm/init.c
+++ b/arch/c6x/mm/init.c
@@ -33,7 +33,7 @@ EXPORT_SYMBOL(empty_zero_page);
 void __init paging_init(void)
 {
 	struct pglist_data *pgdat = NODE_DATA(0);
-	unsigned long zones_size[MAX_NR_ZONES] = {0, };
+	unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
 
 	empty_zero_page      = (unsigned long) memblock_alloc(PAGE_SIZE,
 							      PAGE_SIZE);
@@ -49,11 +49,9 @@ void __init paging_init(void)
 	/*
 	 * Define zones
 	 */
-	zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
-	pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
-		__pa(PAGE_OFFSET) >> PAGE_SHIFT;
+	max_zone_pfn[ZONE_NORMAL] = memory_end >> PAGE_SHIFT;
 
-	free_area_init(zones_size);
+	free_area_init(max_zone_pfn);
 }
 
 void __init mem_init(void)
-- 
cgit v1.2.3