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| author | Andy Whitcroft <apw@shadowen.org> | 2006-06-23 02:03:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-23 07:42:47 -0700 |
| commit | 67de648211fa041fe08a0c25241a4980bbb90698 (patch) | |
| tree | 94f737e0fed7c40dc59e94f05d6851e490082068 /mm | |
| parent | 6811378e7d8b9aa4fca2a1ca73d24c9d67c9cb12 (diff) | |
| download | linux-3.10-67de648211fa041fe08a0c25241a4980bbb90698.tar.gz linux-3.10-67de648211fa041fe08a0c25241a4980bbb90698.tar.bz2 linux-3.10-67de648211fa041fe08a0c25241a4980bbb90698.zip | |
[PATCH] squash duplicate page_to_pfn and pfn_to_page
We have architectures where the size of page_to_pfn and pfn_to_page are
significant enough to overall image size that they wish to push them out of
line. However, in the process we have grown a second copy of the
implementation of each of these routines for each memory model. Share the
implmentation exposing it either inline or out-of-line as required.
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 32 |
1 files changed, 2 insertions, 30 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9dfbe6b7d1c..5af33186a25 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2879,42 +2879,14 @@ void *__init alloc_large_system_hash(const char *tablename, } #ifdef CONFIG_OUT_OF_LINE_PFN_TO_PAGE -/* - * pfn <-> page translation. out-of-line version. - * (see asm-generic/memory_model.h) - */ -#if defined(CONFIG_FLATMEM) -struct page *pfn_to_page(unsigned long pfn) -{ - return mem_map + (pfn - ARCH_PFN_OFFSET); -} -unsigned long page_to_pfn(struct page *page) -{ - return (page - mem_map) + ARCH_PFN_OFFSET; -} -#elif defined(CONFIG_DISCONTIGMEM) struct page *pfn_to_page(unsigned long pfn) { - int nid = arch_pfn_to_nid(pfn); - return NODE_DATA(nid)->node_mem_map + arch_local_page_offset(pfn,nid); + return __pfn_to_page(pfn); } unsigned long page_to_pfn(struct page *page) { - struct pglist_data *pgdat = NODE_DATA(page_to_nid(page)); - return (page - pgdat->node_mem_map) + pgdat->node_start_pfn; -} -#elif defined(CONFIG_SPARSEMEM) -struct page *pfn_to_page(unsigned long pfn) -{ - return __section_mem_map_addr(__pfn_to_section(pfn)) + pfn; -} - -unsigned long page_to_pfn(struct page *page) -{ - long section_id = page_to_section(page); - return page - __section_mem_map_addr(__nr_to_section(section_id)); + return __page_to_pfn(page); } -#endif /* CONFIG_FLATMEM/DISCONTIGMME/SPARSEMEM */ EXPORT_SYMBOL(pfn_to_page); EXPORT_SYMBOL(page_to_pfn); #endif /* CONFIG_OUT_OF_LINE_PFN_TO_PAGE */ |