__SXXX/__PXXX macros is an unnecessary abstraction layer in creating the generic protection_map[] array which is used for vm_get_page_prot(). This abstraction layer can be avoided, if the platforms just define the array protection_map[] for all possible vm_flags access permission combinations. This series drops __SXXX/__PXXX macros from across platforms in the tree. First it makes protection_map[] array private (static) on platforms which enable ARCH_HAS_VM_GET_PAGE_PROT, later moves protection_map[] array into arch for all remaining platforms (!ARCH_HAS_VM_GET_PAGE_PROT), dropping the generic one. In the process __SXXX/__PXXX macros become redundant and thus get dropped off completely. I understand that the diff stat is large here, but please do suggest if there is a better way. This series applies on v5.19-rc1 and has been build tested for multiple platforms. The CC list for this series has been reduced to just minimum, until there is some initial agreement. - Anshuman Changes in V3: - Fix build issues on powerpc and riscv Changes in V2: https://lore.kernel.org/all/20220613053354.553579-1-anshuman.khandual@xxxxxxx/ - Add 'const' identifier to protection_map[] on powerpc - Dropped #ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT check from sparc 32 - Dropped protection_map[] init from sparc 64 - Dropped all new platform changes subscribing ARCH_HAS_VM_GET_PAGE_PROT - Added a second patch which moves generic protection_map[] array into all remaining platforms (!ARCH_HAS_VM_GET_PAGE_PROT) Changes in V1: https://lore.kernel.org/linux-mm/20220603101411.488970-1-anshuman.khandual@xxxxxxx/ Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: linux-mm@xxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Anshuman Khandual (2): mm/mmap: Restrict generic protection_map[] array visibility mm/mmap: Drop generic protection_map[] array arch/alpha/include/asm/pgtable.h | 17 ------- arch/alpha/mm/init.c | 21 +++++++++ arch/arc/include/asm/pgtable-bits-arcv2.h | 18 -------- arch/arc/mm/mmap.c | 19 ++++++++ arch/arm/include/asm/pgtable.h | 17 ------- arch/arm/lib/uaccess_with_memcpy.c | 2 +- arch/arm/mm/mmu.c | 19 ++++++++ arch/arm64/include/asm/pgtable-prot.h | 18 -------- arch/arm64/mm/mmap.c | 21 +++++++++ arch/csky/include/asm/pgtable.h | 18 -------- arch/csky/mm/init.c | 19 ++++++++ arch/hexagon/include/asm/pgtable.h | 27 ------------ arch/hexagon/mm/init.c | 41 +++++++++++++++++ arch/ia64/include/asm/pgtable.h | 18 -------- arch/ia64/mm/init.c | 27 +++++++++++- arch/loongarch/include/asm/pgtable-bits.h | 19 -------- arch/loongarch/mm/cache.c | 45 +++++++++++++++++++ arch/m68k/include/asm/mcf_pgtable.h | 54 ----------------------- arch/m68k/include/asm/motorola_pgtable.h | 22 --------- arch/m68k/include/asm/sun3_pgtable.h | 17 ------- arch/m68k/mm/mcfmmu.c | 54 +++++++++++++++++++++++ arch/m68k/mm/motorola.c | 19 ++++++++ arch/m68k/mm/sun3mmu.c | 19 ++++++++ arch/microblaze/include/asm/pgtable.h | 17 ------- arch/microblaze/mm/init.c | 19 ++++++++ arch/mips/include/asm/pgtable.h | 22 --------- arch/mips/mm/cache.c | 2 + arch/nios2/include/asm/pgtable.h | 16 ------- arch/nios2/mm/init.c | 19 ++++++++ arch/openrisc/include/asm/pgtable.h | 18 -------- arch/openrisc/mm/init.c | 19 ++++++++ arch/parisc/include/asm/pgtable.h | 18 -------- arch/parisc/mm/init.c | 19 ++++++++ arch/powerpc/include/asm/pgtable.h | 18 -------- arch/powerpc/mm/book3s64/pgtable.c | 6 +++ arch/powerpc/mm/pgtable.c | 20 +++++++++ arch/riscv/include/asm/pgtable.h | 20 --------- arch/riscv/mm/init.c | 19 ++++++++ arch/s390/include/asm/pgtable.h | 17 ------- arch/s390/mm/mmap.c | 19 ++++++++ arch/sh/include/asm/pgtable.h | 17 ------- arch/sh/mm/mmap.c | 19 ++++++++ arch/sparc/include/asm/pgtable_32.h | 19 -------- arch/sparc/include/asm/pgtable_64.h | 19 -------- arch/sparc/mm/init_32.c | 19 ++++++++ arch/sparc/mm/init_64.c | 3 ++ arch/um/include/asm/pgtable.h | 17 ------- arch/um/kernel/mem.c | 19 ++++++++ arch/x86/include/asm/pgtable_types.h | 19 -------- arch/x86/mm/pgprot.c | 19 ++++++++ arch/x86/um/mem_32.c | 2 +- arch/xtensa/include/asm/pgtable.h | 18 -------- arch/xtensa/mm/init.c | 19 ++++++++ include/linux/mm.h | 2 + mm/mmap.c | 19 -------- 55 files changed, 547 insertions(+), 522 deletions(-) -- 2.25.1
