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| author | David S. Miller <davem@davemloft.net> | 2014-08-06 05:57:18 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-08-06 05:57:18 +0400 |
| commit | e9011d086674caeedb0ffb6eb5b8bc5920821df3 (patch) | |
| tree | ed5d06353d8dc1fa5f6da349808f8345ca2291a5 /include/linux/pagemap.h | |
| parent | cfcfe22256d5a8a14924a1145d56017b043b554f (diff) | |
| parent | c78f77e20d2ba5d4d5e478e85a6fb42556893e2d (diff) | |
| download | linux-e9011d086674caeedb0ffb6eb5b8bc5920821df3.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Conflicts:
arch/sparc/mm/init_64.c
Conflict was simple non-overlapping additions.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/pagemap.h')
| -rw-r--r-- | include/linux/pagemap.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 0a97b583ee8d..e1474ae18c88 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -399,6 +399,18 @@ static inline struct page *read_mapping_page(struct address_space *mapping, } /* + * Get the offset in PAGE_SIZE. + * (TODO: hugepage should have ->index in PAGE_SIZE) + */ +static inline pgoff_t page_to_pgoff(struct page *page) +{ + if (unlikely(PageHeadHuge(page))) + return page->index << compound_order(page); + else + return page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); +} + +/* * Return byte-offset into filesystem object for page. */ static inline loff_t page_offset(struct page *page) |