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m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM

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The pg_data_map and pg_data_table arrays as well as page_to_pfn() and
pfn_to_page() are required only for DISCONTIGMEM. Other memory models can
use the generic definitions in asm-generic/memory_model.h.

Link: https://lkml.kernel.org/r/20201101170454.9567-13-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Meelis Roos <mroos@linux.ee>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
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 2020-12-14 19:10:11 -08:00 committed by Linus Torvalds
parent 6b2ad8d763
commit 4bfc848e09
5 changed files with 10 additions and 9 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
arch/m68k/Kconfig.cpu
View file

@ -374,7 +374,6 @@ config SINGLE_MEMORY_CHUNK
bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
depends on MMU
default y if SUN3 || MMU_COLDFIRE
select NEED_MULTIPLE_NODES
help
Ignore all but the first contiguous chunk of physical memory for VM
purposes. This will save a few bytes kernel size and may speed up

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

@ -62,8 +62,10 @@ extern unsigned long _ramend;
#include <asm/page_no.h>
#endif
#ifdef CONFIG_DISCONTIGMEM
#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
#endif
#include <asm-generic/getorder.h>

5
arch/m68k/include/asm/page_mm.h
View file

@ -153,6 +153,7 @@ 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; \
@ -165,6 +166,10 @@ static inline __attribute_const__ int __virt_to_node_shift(void)
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)
#include <asm-generic/memory_model.h>
#endif
#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))

5
arch/m68k/include/asm/virtconvert.h
View file

@ -29,12 +29,7 @@ static inline void *phys_to_virt(unsigned long address)
}
/* Permanent address of a page. */
#if defined(CONFIG_MMU) && !defined(CONFIG_DISCONTIGMEM)
#define page_to_phys(page) \
__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
#else
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#endif
/*
* IO bus memory addresses are 1:1 with the physical address,

6
arch/m68k/mm/init.c
View file

@ -42,12 +42,12 @@ EXPORT_SYMBOL(empty_zero_page);
#ifdef CONFIG_MMU
pg_data_t pg_data_map[MAX_NUMNODES];
EXPORT_SYMBOL(pg_data_map);
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