diff mbox series

[182/192] arc: remove support for DISCONTIGMEM

Message ID 20210629024246.5qzpc0nir%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/192] mm/gup: fix try_grab_compound_head() race with split_huge_page() | expand

Commit Message

Andrew Morton June 29, 2021, 2:42 a.m. UTC 
From: Mike Rapoport <rppt@linux.ibm.com>
Subject: arc: remove support for DISCONTIGMEM

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>
---

 arch/arc/Kconfig              |   13 ----------
 arch/arc/include/asm/mmzone.h |   40 --------------------------------
 arch/arc/mm/init.c            |    8 ------
 3 files changed, 61 deletions(-)
diff mbox series

Patch

--- a/arch/arc/include/asm/mmzone.h
+++ /dev/null
@@ -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
--- a/arch/arc/Kconfig~arc-remove-support-for-discontigmem
+++ a/arch/arc/Kconfig
@@ -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"
--- a/arch/arc/mm/init.c~arc-remove-support-for-discontigmem
+++ a/arch/arc/mm/init.c
@@ -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);