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authorHugh Dickins <hugh@veritas.com>2005-11-21 21:32:14 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-22 09:13:42 -0800
commit664beed0190fae687ac51295694004902ddeb18e (patch)
tree89a7c8d9d541fb678c567834cb758fc88b375d47 /mm/page_alloc.c
parent1cdca61bf8537043edde8ef784ce1a1351361dac (diff)
downloadop-kernel-dev-664beed0190fae687ac51295694004902ddeb18e.zip
op-kernel-dev-664beed0190fae687ac51295694004902ddeb18e.tar.gz
[PATCH] unpaged: unifdefed PageCompound
It looks like snd_xxx is not the only nopage to be using PageReserved as a way of holding a high-order page together: which no longer works, but is masked by our failure to free from VM_RESERVED areas. We cannot fix that bug without first substituting another way to hold the high-order page together, while farming out the 0-order pages from within it. That's just what PageCompound is designed for, but it's been kept under CONFIG_HUGETLB_PAGE. Remove the #ifdefs: which saves some space (out- of-line put_page), doesn't slow down what most needs to be fast (already using hugetlb), and unifies the way we handle high-order pages. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index bd4de59..23b84c4 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -148,10 +148,6 @@ static void bad_page(const char *function, struct page *page)
add_taint(TAINT_BAD_PAGE);
}
-#ifndef CONFIG_HUGETLB_PAGE
-#define prep_compound_page(page, order) do { } while (0)
-#define destroy_compound_page(page, order) do { } while (0)
-#else
/*
* Higher-order pages are called "compound pages". They are structured thusly:
*
@@ -205,7 +201,6 @@ static void destroy_compound_page(struct page *page, unsigned long order)
ClearPageCompound(p);
}
}
-#endif /* CONFIG_HUGETLB_PAGE */
/*
* function for dealing with page's order in buddy system.
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