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authorNick Piggin <npiggin@suse.de>2006-03-22 03:08:05 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 10:53:57 -0500
commit8dfcc9ba27e2ed257e5de9539f7f03e57c2c0e33 (patch)
treeaecaeb6a0b33c23f79dfcd2418e4a3881a29f2e2 /include
parent8e7a9aae91101916b86de07fafe3272ea8dc1f10 (diff)
[PATCH] mm: split highorder pages
Have an explicit mm call to split higher order pages into individual pages. Should help to avoid bugs and be more explicit about the code's intention. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Howells <dhowells@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9bbddf228cd9..e67980654c49 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -328,6 +328,12 @@ static inline void get_page(struct page *page)
328 328
329void put_page(struct page *page); 329void put_page(struct page *page);
330 330
331#ifdef CONFIG_MMU
332void split_page(struct page *page, unsigned int order);
333#else
334static inline void split_page(struct page *page, unsigned int order) {}
335#endif
336
331/* 337/*
332 * Multiple processes may "see" the same page. E.g. for untouched 338 * Multiple processes may "see" the same page. E.g. for untouched
333 * mappings of /dev/null, all processes see the same page full of 339 * mappings of /dev/null, all processes see the same page full of