Commit aec2c3ed authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds

VM: allow get_page_unless_zero on compound pages

Both slab defrag and the large blocksize patches need to ability to take
refcounts on compound pages.  May be useful in other places as well.
Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bf53d6f8
...@@ -227,7 +227,7 @@ static inline int put_page_testzero(struct page *page) ...@@ -227,7 +227,7 @@ static inline int put_page_testzero(struct page *page)
*/ */
static inline int get_page_unless_zero(struct page *page) static inline int get_page_unless_zero(struct page *page)
{ {
VM_BUG_ON(PageCompound(page)); VM_BUG_ON(PageTail(page));
return atomic_inc_not_zero(&page->_count); return atomic_inc_not_zero(&page->_count);
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment