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Mon, 10 Nov 2025 09:49:12 -0800 (PST) MIME-Version: 1.0 References: <0ca5d46e292e5074c119c7c58e6ec9901fb0ed73.1761763681.git.m.wieczorretman@pm.me> In-Reply-To: <0ca5d46e292e5074c119c7c58e6ec9901fb0ed73.1761763681.git.m.wieczorretman@pm.me> From: Alexander Potapenko Date: Mon, 10 Nov 2025 18:48:35 +0100 X-Gm-Features: AWmQ_bkJUSMUoO8onDW_Kv00mrjnva_voIrMRMQdowErjlplIdY_Q4t-6BqV8ig Message-ID: Subject: Re: [PATCH v6 14/18] x86: Minimal SLAB alignment To: Maciej Wieczor-Retman Cc: xin@zytor.com, peterz@infradead.org, kaleshsingh@google.com, kbingham@kernel.org, akpm@linux-foundation.org, nathan@kernel.org, ryabinin.a.a@gmail.com, dave.hansen@linux.intel.com, bp@alien8.de, morbo@google.com, jeremy.linton@arm.com, smostafa@google.com, kees@kernel.org, baohua@kernel.org, vbabka@suse.cz, justinstitt@google.com, wangkefeng.wang@huawei.com, leitao@debian.org, jan.kiszka@siemens.com, fujita.tomonori@gmail.com, hpa@zytor.com, urezki@gmail.com, ubizjak@gmail.com, ada.coupriediaz@arm.com, nick.desaulniers+lkml@gmail.com, ojeda@kernel.org, brgerst@gmail.com, elver@google.com, pankaj.gupta@amd.com, mark.rutland@arm.com, trintaeoitogc@gmail.com, jpoimboe@kernel.org, thuth@redhat.com, pasha.tatashin@soleen.com, dvyukov@google.com, jhubbard@nvidia.com, catalin.marinas@arm.com, yeoreum.yun@arm.com, mhocko@suse.com, lorenzo.stoakes@oracle.com, samuel.holland@sifive.com, vincenzo.frascino@arm.com, bigeasy@linutronix.de, surenb@google.com, ardb@kernel.org, Liam.Howlett@oracle.com, nicolas.schier@linux.dev, ziy@nvidia.com, kas@kernel.org, tglx@linutronix.de, mingo@redhat.com, broonie@kernel.org, corbet@lwn.net, andreyknvl@gmail.com, maciej.wieczor-retman@intel.com, david@redhat.com, maz@kernel.org, rppt@kernel.org, will@kernel.org, luto@kernel.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kbuild@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, linux-doc@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam12 X-Rspam-User: X-Rspamd-Queue-Id: 09FE7100002 X-Stat-Signature: 3z9mue7fmf664h6tdfrxzuuoxo4ki5g9 X-HE-Tag: 1762796954-811548 X-HE-Meta: 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 Af85Z+1+ XUvXXqzDdrcvX3gaBZwHS5a15OfNvnpmEDQNimebhEC0TMc2CgO/o/CUIiVEOvcbJ/BEgW1IpirR+ML8zW2yEj36dUU8nuQ1yIguv/AHyvDQpq5tojT9h/ivNw8E+SVaWtdc3SSkBf7Dfa/OJE1X9eREsbvJBkueIDHFqY0e58ng91gBLV66rZ1RB/y5/UwnfYSab3C5EbCk6sbqbfNyeOQQcqHl04bKVCfH/vcBVHQqY2rJd4HUaUDcy8oZ7vqFcexYvLSxShCeHvCw= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > diff --git a/arch/x86/include/asm/cache.h b/arch/x86/include/asm/cache.h > index 69404eae9983..3232583b5487 100644 > --- a/arch/x86/include/asm/cache.h > +++ b/arch/x86/include/asm/cache.h > @@ -21,4 +21,8 @@ > #endif > #endif > > +#ifdef CONFIG_KASAN_SW_TAGS > +#define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT) I don't think linux/linkage.h (the only header included here) defines KASAN_SHADOW_SCALE_SHIFT, does it?