mm, page_alloc: Add missing check for memory holes
authorTony Luck <tony.luck@intel.com>
Wed, 8 Mar 2017 17:35:39 +0000 (09:35 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 8 Mar 2017 19:10:10 +0000 (11:10 -0800)
commitb4fb8f66f1ae2e167d06c12d018025a8d4d3ba7e
tree919fe4cb94b39a50fc2a7566e1a9e96b24a0c987
parent8557b8e43a1de99b12b0d61384742e0d5d0adf84
mm, page_alloc: Add missing check for memory holes

Commit 13ad59df67f1 ("mm, page_alloc: avoid page_to_pfn() when merging
buddies") moved the check for memory holes out of page_is_buddy() and
had the callers do the check.

But this wasn't done correctly in one place which caused ia64 to crash
very early in boot.

Update to fix that and make ia64 boot again.

[ v2: Vlastimil pointed out we don't need to call page_to_pfn()
      since we already have the result of that in "buddy_pfn" ]

Fixes: 13ad59df67f1 ("avoid page_to_pfn() when merging buddies")
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page_alloc.c