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arc: remove support for DISCONTIGMEM

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DISCONTIGMEM was replaced by FLATMEM with freeing of the unused memory map
in v5.11.

Remove the support for DISCONTIGMEM entirely.

Link: https://lkml.kernel.org/r/20210608091316.3622-4-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2021-06-28 19:42:46 -07:00 committed by Linus Torvalds
parent e7793e5390
commit 8b793b4420
3 changed files with 0 additions and 61 deletions
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13
arch/arc/Kconfig
View File

@ -62,10 +62,6 @@ config SCHED_OMIT_FRAME_POINTER
config GENERIC_CSUM
def_bool y
config ARCH_DISCONTIGMEM_ENABLE
def_bool n
depends on BROKEN
config ARCH_FLATMEM_ENABLE
def_bool y
@ -344,15 +340,6 @@ config ARC_HUGEPAGE_16M
endchoice
config NODES_SHIFT
int "Maximum NUMA Nodes (as a power of 2)"
default "0" if !DISCONTIGMEM
default "1" if DISCONTIGMEM
depends on NEED_MULTIPLE_NODES
help
Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
zones.
config ARC_COMPACT_IRQ_LEVELS
depends on ISA_ARCOMPACT
bool "Setup Timer IRQ as high Priority"

40
arch/arc/include/asm/mmzone.h
View File

@ -1,40 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
*/
#ifndef _ASM_ARC_MMZONE_H
#define _ASM_ARC_MMZONE_H
#ifdef CONFIG_DISCONTIGMEM
extern struct pglist_data node_data[];
#define NODE_DATA(nid) (&node_data[nid])
static inline int pfn_to_nid(unsigned long pfn)
{
int is_end_low = 1;
if (IS_ENABLED(CONFIG_ARC_HAS_PAE40))
is_end_low = pfn <= virt_to_pfn(0xFFFFFFFFUL);
/*
* node 0: lowmem: 0x8000_0000 to 0xFFFF_FFFF
* node 1: HIGHMEM w/o PAE40: 0x0 to 0x7FFF_FFFF
* HIGHMEM with PAE40: 0x1_0000_0000 to ...
*/
if (pfn >= ARCH_PFN_OFFSET && is_end_low)
return 0;
return 1;
}
static inline int pfn_valid(unsigned long pfn)
{
int nid = pfn_to_nid(pfn);
return (pfn <= node_end_pfn(nid));
}
#endif /* CONFIG_DISCONTIGMEM */
#endif

8
arch/arc/mm/init.c
View File

@ -32,11 +32,6 @@ unsigned long arch_pfn_offset;
EXPORT_SYMBOL(arch_pfn_offset);
#endif
#ifdef CONFIG_DISCONTIGMEM
struct pglist_data node_data[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL(node_data);
#endif
long __init arc_get_mem_sz(void)
{
return low_mem_sz;
@ -147,9 +142,6 @@ void __init setup_arch_memory(void)
* to the hole is freed and ARC specific version of pfn_valid()
* handles the hole in the memory map.
*/
#ifdef CONFIG_DISCONTIGMEM
node_set_online(1);
#endif
min_high_pfn = PFN_DOWN(high_mem_start);
max_high_pfn = PFN_DOWN(high_mem_start + high_mem_sz);