[PATCH v3 3/9] arc: remove support for DISCONTIGMEM

Mike Rapoport
2021-06-08T09:13:10Z

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

Remove the support for DISCONTIGMEM entirely.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
---
arch/arc/Kconfig | 13 ------------
arch/arc/include/asm/mmzone.h | 40 -----------------------------------
arch/arc/mm/init.c | 8 -------
3 files changed, 61 deletions(-)
delete mode 100644 arch/arc/include/asm/mmzone.h

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 2d98501c0897..d8f51eb8963b 100644
--- a/arch/arc/Kconfig
+++ b/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"
diff --git a/arch/arc/include/asm/mmzone.h b/arch/arc/include/asm/mmzone.h
deleted file mode 100644
index b86b9d1e54dc..000000000000
--- 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
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 397a201adfe3..abfeef7bf6f8 100644
--- a/arch/arc/mm/init.c
+++ b/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);
--
2.28.0