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| author |   Hugh Dickins <hugh@veritas.com> | 2005-11-21 21:32:14 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-22 09:13:42 -0800 |
| commit | 664beed0190fae687ac51295694004902ddeb18e (patch) | |
| tree | 89a7c8d9d541fb678c567834cb758fc88b375d47 /include/linux/mm.h | |
| parent | [PATCH] unpaged: sound nopage get_page (diff) | |
| download | linux-dev-664beed0190fae687ac51295694004902ddeb18e.tar.xz linux-dev-664beed0190fae687ac51295694004902ddeb18e.zip | |
[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 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 19 |
1 files changed, 0 insertions, 19 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 0986d19be0b7..9701210c6680 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -311,8 +311,6 @@ struct page { extern void FASTCALL(__page_cache_release(struct page *)); -#ifdef CONFIG_HUGETLB_PAGE - static inline int page_count(struct page *page) { if (PageCompound(page)) @@ -329,23 +327,6 @@ static inline void get_page(struct page *page) void put_page(struct page *page); -#else /* CONFIG_HUGETLB_PAGE */ - -#define page_count(p) (atomic_read(&(p)->_count) + 1) - -static inline void get_page(struct page *page) -{ - atomic_inc(&page->_count); -} - -static inline void put_page(struct page *page) -{ - if (put_page_testzero(page)) - __page_cache_release(page); -} - -#endif /* CONFIG_HUGETLB_PAGE */ - /* * Multiple processes may "see" the same page. E.g. for untouched * mappings of /dev/null, all processes see the same page full of |