From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org
Cc: Anshuman Khandual <anshuman.khandual@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH V2 0/2] mm/mmap: Drop __SXXX/__PXXX macros from across platforms
Date: Mon, 13 Jun 2022 11:03:52 +0530 [thread overview]
Message-ID: <20220613053354.553579-1-anshuman.khandual@arm.com> (raw)
__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 V2:
- 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@arm.com/
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
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 | 1 +
arch/powerpc/mm/pgtable.c | 19 ++++++++
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, 541 insertions(+), 522 deletions(-)
--
2.25.1
next reply other threads:[~2022-06-13 5:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-13 5:33 Anshuman Khandual [this message]
2022-06-13 5:33 ` [PATCH V2 1/2] mm/mmap: Restrict generic protection_map[] array visibility Anshuman Khandual
2022-06-13 5:33 ` [PATCH V2 2/2] mm/mmap: Drop generic protection_map[] array Anshuman Khandual
2022-06-13 9:31 ` kernel test robot
2022-06-14 2:20 ` Anshuman Khandual
2022-06-13 11:13 ` kernel test robot
2022-06-14 3:05 ` Anshuman Khandual
2022-06-15 13:15 ` [PATCH V2 0/2] mm/mmap: Drop __SXXX/__PXXX macros from across platforms Christoph Hellwig
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