linux-kernel - [PATCH v4 09/12] arch/x86: don't initialize kasan if it's disabled

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Message-ID: <20251128033320.1349620-10-bhe@redhat.com>
Date: Fri, 28 Nov 2025 11:33:17 +0800
From: Baoquan He <bhe@...hat.com>
To: linux-mm@...ck.org
Cc: ryabinin.a.a@...il.com,
	andreyknvl@...il.com,
	glider@...gle.com,
	dvyukov@...gle.com,
	vincenzo.frascino@....com,
	akpm@...ux-foundation.org,
	kasan-dev@...glegroups.com,
	linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org,
	elver@...gle.com,
	sj@...nel.org,
	lorenzo.stoakes@...cle.com,
	snovitoll@...il.com,
	christophe.leroy@...roup.eu,
	Baoquan He <bhe@...hat.com>,
	x86@...nel.org
Subject: [PATCH v4 09/12] arch/x86: don't initialize kasan if it's disabled

Signed-off-by: Baoquan He <bhe@...hat.com>
Cc: x86@...nel.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