A recent change to the memcg code added a call to virt_to_head_page, which is declared in linux/mm.h, but this is not necessarily included here and will cause compile errors: include/linux/memcontrol.h:841:9: error: implicit declaration of function 'virt_to_head_page' [-Werror=implicit-function-declaration] This adds an explicit include statement that gets rid of the error. Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Fixes: 1ead4c071978 ("memcg: simplify and inline __mem_cgroup_from_kmem") diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 47677acb4516..6d18936df7e8 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -27,6 +27,7 @@ #include <linux/vmpressure.h> #include <linux/eventfd.h> #include <linux/mmzone.h> +#include <linux/mm.h> #include <linux/writeback.h> struct mem_cgroup; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>