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Fri, 28 Nov 2025 03:34:51 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.7]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AE04C19560B6; Fri, 28 Nov 2025 03:34:43 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, andreyknvl@gmail.com, glider@google.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, elver@google.com, sj@kernel.org, lorenzo.stoakes@oracle.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He , x86@kernel.org Subject: [PATCH v4 09/12] arch/x86: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:17 +0800 Message-ID: <20251128033320.1349620-10-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspamd-Queue-Id: CE31610000A X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: uynw7rhipsd8wio9f5eymxh7jfwisy1i X-HE-Tag: 1764300898-764054 X-HE-Meta: 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 /77biYeU J8Bix6byRQeUrbz1pg0bB1wtCIoK5G9VxVuPbrQLqzoXR5E/PqdMaNp+0qbvzLp/TBrfbLgigZeMbpZZVUZx+drTSmj3oLWqRo/BFeRxHoB2rJR4hkWKUNzruA24ssFqnExJbpJ4j+19YEWPJviOa0H/lUZujTxV+MNWJ3KYPGuebWN9rRBUIUBZ2KjxhMFSOIPFsgU3+yBpRxP/3dJpQR9llHqw78V0H+8fOVOe/yRzOAGEY9mgGvCl1+3KDWvBBT5GjnpSJ+Erl/dKiuiLyJhDOuqFSPLg2ib5K134e4yaXQYBlGmS/U3vTzfwIxe95CcRnEHS6azBpJs6bXzC0L92oH+peH91SsXf4PuWB3uJpXrvr7Ppgx5s41TiiIPB0Cr2m+7UFmwvz7OetcrEL6jioWzQ/DITICHQTFmwlY2r/vN0= 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: Signed-off-by: Baoquan He Cc: x86@kernel.org --- arch/x86/mm/kasan_init_64.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c index 998b6010d6d3..d642ad364904 100644 --- a/arch/x86/mm/kasan_init_64.c +++ b/arch/x86/mm/kasan_init_64.c @@ -343,6 +343,9 @@ void __init kasan_init(void) unsigned long shadow_cea_begin, shadow_cea_per_cpu_begin, shadow_cea_end; int i; + if (kasan_arg_disabled) + return; + memcpy(early_top_pgt, init_top_pgt, sizeof(early_top_pgt)); /* -- 2.41.0