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authorYasunori Goto <y-goto@jp.fujitsu.com>2008-04-28 05:13:34 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 11:58:26 -0400
commit0c0a4a517a31e05efb38304668198a873bfec6ca (patch)
tree3d02fe9dbf160cd5d328c1e2cf4b40ce37426c5f /mm/internal.h
parent86f6dae1377523689bd8468fed2f2dd180fc0560 (diff)
memory hotplug: free memmaps allocated by bootmem
This patch is to free memmaps which is allocated by bootmem. Freeing usemap is not necessary. The pages of usemap may be necessary for other sections. If removing section is last section on the node, its section is the final user of usemap page. (usemaps are allocated on its section by previous patch.) But it shouldn't be freed too, because the section must be logical offline state which all pages are isolated against page allocater. If it is freed, page alloctor may use it which will be removed physically soon. It will be disaster. So, this patch keeps it as it is. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 789727309f4d..0034e947e4bc 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -34,8 +34,7 @@ static inline void __put_page(struct page *page)
34 atomic_dec(&page->_count); 34 atomic_dec(&page->_count);
35} 35}
36 36
37extern void __init __free_pages_bootmem(struct page *page, 37extern void __free_pages_bootmem(struct page *page, unsigned int order);
38 unsigned int order);
39 38
40/* 39/*
41 * function for dealing with page's order in buddy system. 40 * function for dealing with page's order in buddy system.