On Wed, 21 Oct 2015 17:34:38 +1100 Stephen Rothwell [off-list ref] wrote:

Hi Andrew,

After merging the akpm-current tree, today's linux-next build (arm
allnoconfig and others) failed like this:

In file included from init/main.c:50:0:
include/linux/rmap.h:274:1: error: expected declaration specifiers or '...' before '{' token

Caused by commit

  e4f28388eb72 ("mm: simplify reclaim path for MADV_FREE")

Discovered after the linux-next release.

argh, we broke nommu.

--- a/include/linux/rmap.h~mm-dont-split-thp-page-when-syscall-is-called-fix-6-fix
+++ a/include/linux/rmap.h

@@ -270,7 +270,7 @@ int rmap_walk(struct page *page, struct 
 
 static inline int page_referenced(struct page *page, int is_locked,
 				  struct mem_cgroup *memcg,
-				  unsigned long *vm_flags,
+				  unsigned long *vm_flags)
 {
 	*vm_flags = 0;
 	return 0;