mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-06 02:50:43 +00:00
bb1c50d396
There are no architectures that support DISCONTIGMEM left. Remove the configuration option and the dead code it was guarding in the generic memory management code. Link: https://lkml.kernel.org/r/20210608091316.3622-6-rppt@kernel.org Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: David Hildenbrand <david@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> 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>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __ASM_MEMORY_MODEL_H
|
|
#define __ASM_MEMORY_MODEL_H
|
|
|
|
#include <linux/pfn.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* supports 3 memory models.
|
|
*/
|
|
#if defined(CONFIG_FLATMEM)
|
|
|
|
#ifndef ARCH_PFN_OFFSET
|
|
#define ARCH_PFN_OFFSET (0UL)
|
|
#endif
|
|
|
|
#define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET))
|
|
#define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \
|
|
ARCH_PFN_OFFSET)
|
|
|
|
#elif defined(CONFIG_SPARSEMEM_VMEMMAP)
|
|
|
|
/* memmap is virtually contiguous. */
|
|
#define __pfn_to_page(pfn) (vmemmap + (pfn))
|
|
#define __page_to_pfn(page) (unsigned long)((page) - vmemmap)
|
|
|
|
#elif defined(CONFIG_SPARSEMEM)
|
|
/*
|
|
* Note: section's mem_map is encoded to reflect its start_pfn.
|
|
* section[i].section_mem_map == mem_map's address - start_pfn;
|
|
*/
|
|
#define __page_to_pfn(pg) \
|
|
({ const struct page *__pg = (pg); \
|
|
int __sec = page_to_section(__pg); \
|
|
(unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \
|
|
})
|
|
|
|
#define __pfn_to_page(pfn) \
|
|
({ unsigned long __pfn = (pfn); \
|
|
struct mem_section *__sec = __pfn_to_section(__pfn); \
|
|
__section_mem_map_addr(__sec) + __pfn; \
|
|
})
|
|
#endif /* CONFIG_FLATMEM/SPARSEMEM */
|
|
|
|
/*
|
|
* Convert a physical address to a Page Frame Number and back
|
|
*/
|
|
#define __phys_to_pfn(paddr) PHYS_PFN(paddr)
|
|
#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
|
|
|
|
#define page_to_pfn __page_to_pfn
|
|
#define pfn_to_page __pfn_to_page
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif
|