The patch titled Subject: mm: move MAP_SYNC to asm-generic/mman-common.h has been added to the -mm tree. Its filename is mm-move-map_sync-to-asm-generic-mman-commonh.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-move-map_sync-to-asm-generic-mman-commonh.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-move-map_sync-to-asm-generic-mman-commonh.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx> Subject: mm: move MAP_SYNC to asm-generic/mman-common.h This enables support for synchronous DAX fault on powerpc The generic changes are added as part of b6fb293f2497 ("mm: Define MAP_SYNC and VM_SYNC flags") Without this, mmap returns EOPNOTSUPP for MAP_SYNC with MAP_SHARED_VALIDATE Instead of adding MAP_SYNC with same value to arch/powerpc/include/uapi/asm/mman.h, I am moving the #define to asm-generic/mman-common.h. Two architectures using mman-common.h directly are sparc and powerpc. We should be able to consloidate more #defines to mman-common.h. That can be done as a separate patch. Link: http://lkml.kernel.org/r/20190528091120.13322-1-aneesh.kumar@xxxxxxxxxxxxx Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx> Reviewed-by: Jan Kara <jack@xxxxxxx> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/uapi/asm-generic/mman-common.h | 3 ++- include/uapi/asm-generic/mman.h | 1 - 2 files changed, 2 insertions(+), 2 deletions(-) --- a/include/uapi/asm-generic/mman-common.h~mm-move-map_sync-to-asm-generic-mman-commonh +++ a/include/uapi/asm-generic/mman-common.h @@ -25,7 +25,8 @@ # define MAP_UNINITIALIZED 0x0 /* Don't support this flag */ #endif -/* 0x0100 - 0x80000 flags are defined in asm-generic/mman.h */ +/* 0x0100 - 0x40000 flags are defined in asm-generic/mman.h */ +#define MAP_SYNC 0x080000 /* perform synchronous page faults for the mapping */ #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ /* --- a/include/uapi/asm-generic/mman.h~mm-move-map_sync-to-asm-generic-mman-commonh +++ a/include/uapi/asm-generic/mman.h @@ -13,7 +13,6 @@ #define MAP_NONBLOCK 0x10000 /* do not block on IO */ #define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */ #define MAP_HUGETLB 0x40000 /* create a huge page mapping */ -#define MAP_SYNC 0x80000 /* perform synchronous page faults for the mapping */ /* Bits [26:31] are reserved, see mman-common.h for MAP_HUGETLB usage */ _ Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxx are mm-move-map_sync-to-asm-generic-mman-commonh.patch