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m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM
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>
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@ -374,7 +374,6 @@ config SINGLE_MEMORY_CHUNK
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bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
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depends on MMU
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default y if SUN3 || MMU_COLDFIRE
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select NEED_MULTIPLE_NODES
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help
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Ignore all but the first contiguous chunk of physical memory for VM
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purposes. This will save a few bytes kernel size and may speed up
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@ -62,8 +62,10 @@ extern unsigned long _ramend;
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#include <asm/page_no.h>
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#endif
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#ifdef CONFIG_DISCONTIGMEM
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#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
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#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
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#endif
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#include <asm-generic/getorder.h>
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@ -153,6 +153,7 @@ static inline __attribute_const__ int __virt_to_node_shift(void)
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pfn_to_virt(page_to_pfn(page)); \
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})
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#ifdef CONFIG_DISCONTIGMEM
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#define pfn_to_page(pfn) ({ \
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unsigned long __pfn = (pfn); \
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struct pglist_data *pgdat; \
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@ -165,6 +166,10 @@ static inline __attribute_const__ int __virt_to_node_shift(void)
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pgdat = &pg_data_map[page_to_nid(__p)]; \
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((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \
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})
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#else
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#define ARCH_PFN_OFFSET (m68k_memory[0].addr)
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#include <asm-generic/memory_model.h>
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#endif
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#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
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#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
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@ -29,12 +29,7 @@ static inline void *phys_to_virt(unsigned long address)
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}
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/* Permanent address of a page. */
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#if defined(CONFIG_MMU) && !defined(CONFIG_DISCONTIGMEM)
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#define page_to_phys(page) \
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__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
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#else
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#endif
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/*
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* IO bus memory addresses are 1:1 with the physical address,
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@ -42,12 +42,12 @@ EXPORT_SYMBOL(empty_zero_page);
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#ifdef CONFIG_MMU
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pg_data_t pg_data_map[MAX_NUMNODES];
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EXPORT_SYMBOL(pg_data_map);
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int m68k_virt_to_node_shift;
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#ifdef CONFIG_DISCONTIGMEM
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pg_data_t pg_data_map[MAX_NUMNODES];
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EXPORT_SYMBOL(pg_data_map);
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pg_data_t *pg_data_table[65];
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EXPORT_SYMBOL(pg_data_table);
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#endif
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