arm: include asm/cacheflush.h in asm/hugetlb.h

Patch series "arch: include asm/cacheflush.h in asm/hugetlb.h".

Three architectures are using PG_dcache_clean in their asm/hugetlb.h,
but relying on accident to include the asm/cacheflush.h which defines it.


This patch (of 3):

PG_dcache_clean is used in asm/hugetlb.h but defined in asm/cacheflush.h:
builds rely on an accident of that being included via linux/mempolicy.h,
but better include it directly (like arch/sh/include/asm/hugetlb.h does).

Link: https://lkml.kernel.org/r/6d2acfa4-7f44-d3b4-b0a8-5495c5985e4c@google.com
Link: https://lkml.kernel.org/r/4b055d0-7b2e-72bf-9b9d-8f3f1cd312d0@google.comSigned-off-by: Hugh Dickins <hughd@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

arch/arm/include/asm/hugetlb.h

@@ -10,6 +10,7 @@
 #ifndef _ASM_ARM_HUGETLB_H
 #define _ASM_ARM_HUGETLB_H
 
+#include <asm/cacheflush.h>
 #include <asm/page.h>
 #include <asm/hugetlb-3level.h>
 #include <asm-generic/hugetlb.h>