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authorAl Viro <viro@zeniv.linux.org.uk>2016-12-16 16:21:05 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2016-12-16 16:21:05 -0500
commit3c55d6bcfe8163ff2b5636b4aabe3caa3f5d95f4 (patch)
tree3229c2de6e95352751d1c9e05dcd2925a3212beb /include/linux/pagemap.h
parent4da00fd1b948b408f76488c4e506af748be5fce8 (diff)
parent29ac8e856cb3694e004037de595dec4ec53d42f2 (diff)
Merge remote-tracking branch 'djwong/ocfs2-vfs-reflink-6' into for-linus
Diffstat (limited to 'include/linux/pagemap.h')
-rw-r--r--include/linux/pagemap.h21
1 files changed, 15 insertions, 6 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index dd15d39e1985..7dbe9148b2f8 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -374,16 +374,13 @@ 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)
+ * Get index of the page with in radix-tree
+ * (TODO: remove once hugetlb pages will have ->index in PAGE_SIZE)
*/
-static inline pgoff_t page_to_pgoff(struct page *page)
+static inline pgoff_t page_to_index(struct page *page)
{
pgoff_t pgoff;
- if (unlikely(PageHeadHuge(page)))
- return page->index << compound_order(page);
-
if (likely(!PageTransTail(page)))
return page->index;
@@ -397,6 +394,18 @@ static inline pgoff_t page_to_pgoff(struct page *page)
}
/*
+ * 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);
+
+ return page_to_index(page);
+}
+
+/*
* Return byte-offset into filesystem object for page.
*/
static inline loff_t page_offset(struct page *page)