mm/hmm: select mmu notifier when selecting HMM

To avoid random config build issue, select mmu notifier when HMM is
selected.  In any cases when HMM get selected it will be by users that
will also wants the mmu notifier.

Link: http://lkml.kernel.org/r/20190403193318.16478-2-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/Kconfig b/mm/Kconfig
index 137eadc..0eada3f 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -697,12 +697,12 @@ config DEV_PAGEMAP_OPS
 
 config HMM
        bool
+       select MMU_NOTIFIER
        select MIGRATE_VMA_HELPER
 
 config HMM_MIRROR
        bool "HMM mirror CPU page table into a device page table"
        depends on ARCH_HAS_HMM
-       select MMU_NOTIFIER
        select HMM
        help
          Select HMM_MIRROR if you want to mirror range of the CPU page table of a