On Thu, 16 Jul 2015 14:41:52 +0100 Mark Brown broonie@kernel.org wrote:
On Thu, Jul 16, 2015 at 11:05:11AM +0100, Build bot for Mark Brown wrote:
Today's linux-next fails to build an arm64 allnoconfig due to "mm: make GUP handle pfn mapping unless FOLL_GET is requested" which causes:
arm64-allnoconfig ../mm/gup.c:51:4: error: implicit declaration of function 'update_mmu_cache' [-Werror=implicit-function-declaration]
The update_mmu_cache() function is defined unconditionally in asm/tlbflush.h so there is presumably some path of conditional inclusions which causes it not to get declared in an allnoconfig - I didn't chase that down yet.
I did te obvious:
--- a/mm/gup.c~mm-make-gup-handle-pfn-mapping-unless-foll_get-is-requested-fix +++ a/mm/gup.c @@ -12,7 +12,9 @@ #include <linux/sched.h> #include <linux/rwsem.h> #include <linux/hugetlb.h> + #include <asm/pgtable.h> +#include <asm/tlbflush.h>
#include "internal.h"
I don't have arm64 toolchain here, but it fixed the error on arm and that's what mm/memory.c does.