tree 668160019ab157500a90655cf44f798ed3c77893
parent ea3061d227816d00717446ac12b853d7ae04b4fe
author Mel Gorman <mel@csn.ul.ie> 1192523170 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1192552981 -0700

Breakout page_order() to internal.h to avoid special knowledge of the buddy allocator

The statistics patch later needs to know what order a free page is on the free
lists.  Rather than having special knowledge of page_private() when
PageBuddy() is set, this patch places out page_order() in internal.h and adds
a VM_BUG_ON to catch using it on non-PageBuddy pages.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>