Le 24/01/2026 à 10:56, Mike Rapoport a écrit :
From: "Mike Rapoport (Microsoft)" <[email protected]> Reduce 22 declarations of empty_zero_page to 3 and 23 declarations of ZERO_PAGE() to 4. Every architecture defines empty_zero_page that way or another, but for the most of them it is always a page aligned page in BSS and most definitions of ZERO_PAGE do virt_to_page(empty_zero_page). Move Linus vetted x86 definition of empty_zero_page and ZERO_PAGE() to the core MM and drop these definitions in architectures that do not implement colored zero page (MIPS and s390). ZERO_PAGE() remains a macro because turning it to a wrapper for a static inline causes severe pain in header dependencies. For the most part the change is mechanical, with these being noteworthy: * alpha: aliased empty_zero_page with ZERO_PGE that was also used for boot parameters. Switching to a generic empty_zero_page removes the aliasing and keeps ZERO_PGE for boot parameters only * arm64: uses __pa_symbol() in ZERO_PAGE() so that definition of ZERO_PAGE() is kept intact. * m68k/parisc/sparc64/um: allocated empty_zero_page from memblock, although they do not support zero page coloring and having it in BSS will work fine. * sh: used empty_zero_page for boot parameters at the very early boot. Rename the parameters page to boot_params_page and let sh use the generic empty_zero_page. * hexagon: had an amusing comment about empty_zero_page /* A handy thing to have if one has the RAM. Declared in head.S */ that unfortunately had to go :) Signed-off-by: Mike Rapoport (Microsoft) <[email protected]> --- arch/alpha/include/asm/pgtable.h | 6 ------ arch/arc/include/asm/pgtable.h | 3 --- arch/arc/mm/init.c | 2 -- arch/arm/include/asm/pgtable.h | 9 --------- arch/arm/mm/mmu.c | 7 ------- arch/arm/mm/nommu.c | 7 ------- arch/arm64/include/asm/pgtable.h | 1 - arch/arm64/mm/mmu.c | 7 ------- arch/csky/include/asm/pgtable.h | 3 --- arch/csky/mm/init.c | 3 --- arch/hexagon/include/asm/pgtable.h | 6 ------ arch/hexagon/kernel/head.S | 5 ----- arch/hexagon/kernel/hexagon_ksyms.c | 1 - arch/loongarch/include/asm/pgtable.h | 9 --------- arch/loongarch/mm/init.c | 3 --- arch/m68k/include/asm/pgtable_mm.h | 9 --------- arch/m68k/include/asm/pgtable_no.h | 7 ------- arch/m68k/mm/init.c | 9 --------- arch/m68k/mm/mcfmmu.c | 2 -- arch/m68k/mm/motorola.c | 6 ------ arch/m68k/mm/sun3mmu.c | 2 -- arch/microblaze/include/asm/pgtable.h | 10 ---------- arch/microblaze/kernel/head.S | 4 ---- arch/microblaze/kernel/microblaze_ksyms.c | 2 -- arch/nios2/include/asm/pgtable.h | 7 ------- arch/nios2/kernel/head.S | 10 ---------- arch/nios2/kernel/nios2_ksyms.c | 1 - arch/openrisc/include/asm/pgtable.h | 4 ---- arch/openrisc/kernel/head.S | 3 --- arch/openrisc/kernel/or32_ksyms.c | 1 - arch/openrisc/mm/init.c | 3 --- arch/parisc/include/asm/pgtable.h | 11 ----------- arch/parisc/mm/init.c | 6 ------ arch/powerpc/include/asm/pgtable.h | 6 ------ arch/powerpc/mm/mem.c | 3 ---
For powerpc: Reviewed-by: Christophe Leroy (CS GROUP) <[email protected]>
arch/riscv/include/asm/pgtable.h | 7 ------- arch/riscv/mm/init.c | 4 ---- arch/sh/include/asm/pgtable.h | 8 -------- arch/sh/include/asm/setup.h | 3 ++- arch/sh/kernel/head_32.S | 4 ++-- arch/sh/kernel/sh_ksyms_32.c | 1 - arch/sh/mm/init.c | 1 - arch/sparc/include/asm/pgtable_32.h | 8 -------- arch/sparc/include/asm/pgtable_64.h | 3 --- arch/sparc/include/asm/setup.h | 2 -- arch/sparc/kernel/head_32.S | 7 ------- arch/sparc/mm/init_32.c | 4 ---- arch/sparc/mm/init_64.c | 15 --------------- arch/um/include/asm/pgtable.h | 9 --------- arch/um/include/shared/kern_util.h | 1 - arch/um/kernel/mem.c | 16 ---------------- arch/um/kernel/um_arch.c | 1 - arch/x86/include/asm/pgtable.h | 8 -------- arch/x86/kernel/head_32.S | 4 ---- arch/x86/kernel/head_64.S | 7 ------- arch/xtensa/include/asm/pgtable.h | 4 ---- arch/xtensa/kernel/head.S | 3 --- arch/xtensa/kernel/xtensa_ksyms.c | 2 -- include/linux/pgtable.h | 8 ++++++++ mm/mm_init.c | 9 +++++++++ 60 files changed, 21 insertions(+), 296 deletions(-)
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