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m68k: 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/20210608091316.3622-5-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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>
Cc: Vineet Gupta <vgupta@synopsys.com>
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 19:42:49 -07:00 committed by Linus Torvalds
parent 8b793b4420
commit 5ab06e1099
5 changed files with 1 additions and 76 deletions
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10
arch/m68k/Kconfig.cpu
View File

@ -408,10 +408,6 @@ config SINGLE_MEMORY_CHUNK
order" to save memory that could be wasted for unused memory map.
Say N if not sure.
config ARCH_DISCONTIGMEM_ENABLE
depends on BROKEN
def_bool MMU && !SINGLE_MEMORY_CHUNK
config FORCE_MAX_ZONEORDER
int "Maximum zone order" if ADVANCED
depends on !SINGLE_MEMORY_CHUNK
@ -451,11 +447,6 @@ config M68K_L2_CACHE
depends on MAC
default y
config NODES_SHIFT
int
default "3"
depends on DISCONTIGMEM
config CPU_HAS_NO_BITFIELDS
bool
@ -553,4 +544,3 @@ config CACHE_COPYBACK
The ColdFire CPU cache is set into Copy-back mode.
endchoice
endif

10
arch/m68k/include/asm/mmzone.h
View File

@ -1,10 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M68K_MMZONE_H_
#define _ASM_M68K_MMZONE_H_
extern pg_data_t pg_data_map[];
#define NODE_DATA(nid) (&pg_data_map[nid])
#define NODE_MEM_MAP(nid) (NODE_DATA(nid)->node_mem_map)
#endif /* _ASM_M68K_MMZONE_H_ */

2
arch/m68k/include/asm/page.h
View File

@ -62,7 +62,7 @@ extern unsigned long _ramend;
#include <asm/page_no.h>
#endif
#if !defined(CONFIG_MMU) || defined(CONFIG_DISCONTIGMEM)
#ifndef CONFIG_MMU
#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
#endif

35
arch/m68k/include/asm/page_mm.h
View File

@ -126,26 +126,6 @@ static inline void *__va(unsigned long x)
extern int m68k_virt_to_node_shift;
#ifndef CONFIG_DISCONTIGMEM
#define __virt_to_node(addr) (&pg_data_map[0])
#else
extern struct pglist_data *pg_data_table[];
static inline __attribute_const__ int __virt_to_node_shift(void)
{
int shift;
asm (
"1: moveq #0,%0\n"
m68k_fixup(%c1, 1b)
: "=d" (shift)
: "i" (m68k_fixup_vnode_shift));
return shift;
}
#define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
#endif
#define virt_to_page(addr) ({ \
pfn_to_page(virt_to_pfn(addr)); \
})
@ -153,23 +133,8 @@ static inline __attribute_const__ int __virt_to_node_shift(void)
pfn_to_virt(page_to_pfn(page)); \
})
#ifdef CONFIG_DISCONTIGMEM
#define pfn_to_page(pfn) ({ \
unsigned long __pfn = (pfn); \
struct pglist_data *pgdat; \
pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \
pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \
})
#define page_to_pfn(_page) ({ \
const struct page *__p = (_page); \
struct pglist_data *pgdat; \
pgdat = &pg_data_map[page_to_nid(__p)]; \
((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \
})
#else
#define ARCH_PFN_OFFSET (m68k_memory[0].addr >> PAGE_SHIFT)
#include <asm-generic/memory_model.h>
#endif
#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))

20
arch/m68k/mm/init.c
View File

@ -44,28 +44,8 @@ EXPORT_SYMBOL(empty_zero_page);
int m68k_virt_to_node_shift;
#ifdef CONFIG_DISCONTIGMEM
pg_data_t pg_data_map[MAX_NUMNODES];
EXPORT_SYMBOL(pg_data_map);
pg_data_t *pg_data_table[65];
EXPORT_SYMBOL(pg_data_table);
#endif
void __init m68k_setup_node(int node)
{
#ifdef CONFIG_DISCONTIGMEM
struct m68k_mem_info *info = m68k_memory + node;
int i, end;
i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
for (; i <= end; i++) {
if (pg_data_table[i])
pr_warn("overlap at %u for chunk %u\n", i, node);
pg_data_table[i] = pg_data_map + node;
}
#endif
node_set_online(node);
}