| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <02784e9a-d934-44c3-ae24-a83a1bcf678d@kernel.org> Date: Sat, 24 Jan 2026 11:15:47 +0100 From: "Christophe Leroy (CS GROUP)" <chleroy@...nel.org> To: Mike Rapoport <rppt@...nel.org>, Andrew Morton <akpm@...ux-foundation.org> Cc: Andreas Larsson <andreas@...sler.com>, Borislav Petkov <bp@...en8.de>, Brian Cain <bcain@...nel.org>, Catalin Marinas <catalin.marinas@....com>, "David S. Miller" <davem@...emloft.net>, Dave Hansen <dave.hansen@...ux.intel.com>, David Hildenbrand <david@...nel.org>, Dinh Nguyen <dinguyen@...nel.org>, Geert Uytterhoeven <geert@...ux-m68k.org>, Guo Ren <guoren@...nel.org>, Helge Deller <deller@....de>, Huacai Chen <chenhuacai@...nel.org>, Ingo Molnar <mingo@...hat.com>, Johannes Berg <johannes@...solutions.net>, John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>, "Liam R. Howlett" <Liam.Howlett@...cle.com>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, Madhavan Srinivasan <maddy@...ux.ibm.com>, Magnus Lindholm <linmag7@...il.com>, Matt Turner <mattst88@...il.com>, Max Filippov <jcmvbkbc@...il.com>, Michael Ellerman <mpe@...erman.id.au>, Michal Hocko <mhocko@...e.com>, Michal Simek <monstr@...str.eu>, Palmer Dabbelt <palmer@...belt.com>, Richard Weinberger <richard@....at>, Russell King <linux@...linux.org.uk>, Stafford Horne <shorne@...il.com>, Suren Baghdasaryan <surenb@...gle.com>, Thomas Gleixner <tglx@...nel.org>, Vineet Gupta <vgupta@...nel.org>, Vlastimil Babka <vbabka@...e.cz>, Will Deacon <will@...nel.org>, linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org, linux-snps-arc@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org, linux-hexagon@...r.kernel.org, loongarch@...ts.linux.dev, linux-m68k@...ts.linux-m68k.org, linux-openrisc@...r.kernel.org, linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org, linux-sh@...r.kernel.org, sparclinux@...r.kernel.org, linux-um@...ts.infradead.org, linux-mm@...ck.org, x86@...nel.org Subject: Re: [PATCH mm-unstable] arch, mm: consolidate empty_zero_page Le 24/01/2026 à 10:56, Mike Rapoport a écrit : > From: "Mike Rapoport (Microsoft)" <rppt@...nel.org> > > 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) <rppt@...nel.org> > --- > 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) <chleroy@...nel.org> > 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(-) >
Powered by blists - more mailing lists