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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-08 11:29:45 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-08 11:29:45 +0000 |
| commit | 07afa01813d547570a762034f0dce7fd8baa8b3d (patch) | |
| tree | 5b0a34f64e0f0e824ea153adeb6c98b98dd852ac /include/linux/page-flags.h | |
| parent | 01a61f490cab732542753db69e17e5db657d185a (diff) | |
| parent | 3b4bc7bccc7857274705b05cf81a0c72cfd0b0dd (diff) | |
Merge remote-tracking branch 'asoc/fix/pxa' into asoc-pxa
Diffstat (limited to 'include/linux/page-flags.h')
| -rw-r--r-- | include/linux/page-flags.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index b5d13841604e..70473da47b3f 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -362,7 +362,7 @@ static inline void ClearPageCompound(struct page *page) * pages on the LRU and/or pagecache. */ TESTPAGEFLAG(Compound, compound) -__PAGEFLAG(Head, compound) +__SETPAGEFLAG(Head, compound) __CLEARPAGEFLAG(Head, compound) /* * PG_reclaim is used in combination with PG_compound to mark the @@ -374,8 +374,14 @@ __PAGEFLAG(Head, compound) * PG_compound & PG_reclaim => Tail page * PG_compound & ~PG_reclaim => Head page */ +#define PG_head_mask ((1L << PG_compound)) #define PG_head_tail_mask ((1L << PG_compound) | (1L << PG_reclaim)) +static inline int PageHead(struct page *page) +{ + return ((page->flags & PG_head_tail_mask) == PG_head_mask); +} + static inline int PageTail(struct page *page) { return ((page->flags & PG_head_tail_mask) == PG_head_tail_mask); |