These 2 patches are based on the discussion of "Sealed memfd & no-fault mmap" at https://bit.ly/3pdwOGR patch 1: make "vm_flags" be an u64, so we can have enough bits on 32-bit architectures. Then we can add VM_NOSIGBUS which is bit 38. patch 2: support no-fault mmap for shmem read Ming Lin (2): mm: make "vm_flags" be an u64 mm: adds NOSIGBUS extension for out-of-band shmem read arch/arm64/Kconfig | 1 - arch/powerpc/Kconfig | 1 - arch/x86/Kconfig | 1 - include/linux/mm.h | 102 ++++++++++++++++----------------- include/linux/mm_types.h | 4 +- include/linux/mman.h | 5 +- include/uapi/asm-generic/mman-common.h | 1 + mm/Kconfig | 2 - mm/memory.c | 2 +- mm/mmap.c | 5 +- mm/shmem.c | 17 +++++- 11 files changed, 76 insertions(+), 65 deletions(-) -- 1.8.3.1
