diff options
| author | Mike Rapoport <rppt@linux.ibm.com> | 2021-06-28 19:42:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-29 10:53:55 -0700 |
| commit | bb1c50d3967f69f413b333713c2718d48d1ab7ea (patch) | |
| tree | 4bf2317dd231ae254acbf988e7c3867d87dca353 /include | |
| parent | 5ab06e10990c3a04e00318c5ca93048c0f53a0a7 (diff) | |
mm: remove CONFIG_DISCONTIGMEM
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/memory_model.h | 37 | ||||
| -rw-r--r-- | include/linux/mmzone.h | 8 |
2 files changed, 9 insertions, 36 deletions
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h index 7637fb46ba4f..a2c8ed60233a 100644 --- a/include/asm-generic/memory_model.h +++ b/include/asm-generic/memory_model.h @@ -6,47 +6,18 @@ #ifndef __ASSEMBLY__ +/* + * supports 3 memory models. + */ #if defined(CONFIG_FLATMEM) #ifndef ARCH_PFN_OFFSET #define ARCH_PFN_OFFSET (0UL) #endif -#elif defined(CONFIG_DISCONTIGMEM) - -#ifndef arch_pfn_to_nid -#define arch_pfn_to_nid(pfn) pfn_to_nid(pfn) -#endif - -#ifndef arch_local_page_offset -#define arch_local_page_offset(pfn, nid) \ - ((pfn) - NODE_DATA(nid)->node_start_pfn) -#endif - -#endif /* CONFIG_DISCONTIGMEM */ - -/* - * supports 3 memory models. - */ -#if defined(CONFIG_FLATMEM) - #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_DISCONTIGMEM) - -#define __pfn_to_page(pfn) \ -({ unsigned long __pfn = (pfn); \ - unsigned long __nid = arch_pfn_to_nid(__pfn); \ - NODE_DATA(__nid)->node_mem_map + arch_local_page_offset(__pfn, __nid);\ -}) - -#define __page_to_pfn(pg) \ -({ const struct page *__pg = (pg); \ - struct pglist_data *__pgdat = NODE_DATA(page_to_nid(__pg)); \ - (unsigned long)(__pg - __pgdat->node_mem_map) + \ - __pgdat->node_start_pfn; \ -}) #elif defined(CONFIG_SPARSEMEM_VMEMMAP) @@ -70,7 +41,7 @@ struct mem_section *__sec = __pfn_to_section(__pfn); \ __section_mem_map_addr(__sec) + __pfn; \ }) -#endif /* CONFIG_FLATMEM/DISCONTIGMEM/SPARSEMEM */ +#endif /* CONFIG_FLATMEM/SPARSEMEM */ /* * Convert a physical address to a Page Frame Number and back diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 3e62e8ef68b5..6f9829562af2 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -749,10 +749,12 @@ struct zonelist { struct zoneref _zonerefs[MAX_ZONES_PER_ZONELIST + 1]; }; -#ifndef CONFIG_DISCONTIGMEM -/* The array of struct pages - for discontigmem use pgdat->lmem_map */ +/* + * The array of struct pages for flatmem. + * It must be declared for SPARSEMEM as well because there are configurations + * that rely on that. + */ extern struct page *mem_map; -#endif #ifdef CONFIG_TRANSPARENT_HUGEPAGE struct deferred_split { |