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| author | Hugh Dickins | 2005-11-22 06:32:14 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2005-11-22 18:13:42 +0100 |
| commit | 664beed0190fae687ac51295694004902ddeb18e (patch) | |
| tree | 89a7c8d9d541fb678c567834cb758fc88b375d47 /include/linux/page-flags.h | |
| parent | [PATCH] unpaged: sound nopage get_page (diff) | |
| download | kernel-qcow2-linux-664beed0190fae687ac51295694004902ddeb18e.tar.gz kernel-qcow2-linux-664beed0190fae687ac51295694004902ddeb18e.tar.xz kernel-qcow2-linux-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/page-flags.h')
| -rw-r--r-- | include/linux/page-flags.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index f34767c5fc79..343083fec258 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -287,11 +287,7 @@ extern void __mod_page_state(unsigned long offset, unsigned long delta); #define ClearPageReclaim(page) clear_bit(PG_reclaim, &(page)->flags) #define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags) -#ifdef CONFIG_HUGETLB_PAGE #define PageCompound(page) test_bit(PG_compound, &(page)->flags) -#else -#define PageCompound(page) 0 -#endif #define SetPageCompound(page) set_bit(PG_compound, &(page)->flags) #define ClearPageCompound(page) clear_bit(PG_compound, &(page)->flags) |