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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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817f72d680
The definition of page_to_phys for nommu produces an incorrect value when PAGE_OFFSET is non-zero. The nommu version of page_to_pfn works correctly for non-zero PAGE_OFFSET, so use that instead. Signed-off-by: Steven King <sfking@fdwdc.com> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
44 lines
908 B
C
44 lines
908 B
C
#ifndef __VIRT_CONVERT__
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#define __VIRT_CONVERT__
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/*
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* Macros used for converting between virtual and physical mappings.
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*/
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#ifdef __KERNEL__
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#include <linux/compiler.h>
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#include <linux/mmzone.h>
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#include <asm/setup.h>
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#include <asm/page.h>
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/*
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* Change virtual addresses to physical addresses and vv.
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*/
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static inline unsigned long virt_to_phys(void *address)
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{
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return __pa(address);
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}
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static inline void *phys_to_virt(unsigned long address)
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{
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return __va(address);
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}
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/* Permanent address of a page. */
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#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
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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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*/
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#define virt_to_bus virt_to_phys
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#define bus_to_virt phys_to_virt
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#endif
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#endif
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