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authorAndy Whitcroft <apw@shadowen.org>2006-06-23 02:03:12 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 07:42:47 -0700
commit67de648211fa041fe08a0c25241a4980bbb90698 (patch)
tree94f737e0fed7c40dc59e94f05d6851e490082068 /mm
parent6811378e7d8b9aa4fca2a1ca73d24c9d67c9cb12 (diff)
downloadop-kernel-dev-67de648211fa041fe08a0c25241a4980bbb90698.zip
op-kernel-dev-67de648211fa041fe08a0c25241a4980bbb90698.tar.gz
[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.c32
1 files changed, 2 insertions, 30 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9dfbe6b..5af3318 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 */
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