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From: Baoquan He <bhe@redhat.com>
To: kasan-dev@googlegroups.com
Cc: linux-mm@kvack.org, andreyknvl@gmail.com, ryabinin.a.a@gmail.com,
	glider@google.com, dvyukov@google.com,
	linux-kernel@vger.kernel.org, linux-um@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
	linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org,
	x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com,
	linux-s390@vger.kernel.org, hca@linux.ibm.com,
	Baoquan He <bhe@redhat.com>
Subject: [PATCH v5 03/15] mm/kasan: mm/kasan: move kasan= code to common place
Date: Wed, 25 Feb 2026 16:14:00 +0800	[thread overview]
Message-ID: <20260225081412.76502-4-bhe@redhat.com> (raw)
In-Reply-To: <20260225081412.76502-1-bhe@redhat.com>

This allows generic and sw_tags to be set in kernel cmdline too.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 include/linux/kasan-enabled.h |  2 ++
 mm/kasan/common.c             | 21 +++++++++++++++++++++
 mm/kasan/hw_tags.c            | 18 ------------------
 3 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/include/linux/kasan-enabled.h b/include/linux/kasan-enabled.h
index 9eca967d8526..b7cb906825ca 100644
--- a/include/linux/kasan-enabled.h
+++ b/include/linux/kasan-enabled.h
@@ -35,6 +35,8 @@ static inline void kasan_enable(void) {}
 #endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */
 
 #ifdef CONFIG_KASAN_HW_TAGS
+extern bool kasan_arg_disabled;
+
 static inline bool kasan_hw_tags_enabled(void)
 {
 	return kasan_enabled();
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index b7d05c2a6d93..0d788a468e96 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -42,6 +42,27 @@ DEFINE_STATIC_KEY_FALSE(kasan_flag_enabled);
 EXPORT_SYMBOL_GPL(kasan_flag_enabled);
 #endif
 
+#ifdef CONFIG_KASAN_HW_TAGS
+bool kasan_arg_disabled __ro_after_init;
+
+/* kasan=off/on */
+static int __init early_kasan_flag(char *arg)
+{
+	if (!arg)
+		return -EINVAL;
+
+	if (!strcmp(arg, "off"))
+		kasan_arg_disabled = true;
+	else if (!strcmp(arg, "on"))
+		kasan_arg_disabled = false;
+	else
+		return -EINVAL;
+
+	return 0;
+}
+early_param("kasan", early_kasan_flag);
+#endif
+
 struct slab *kasan_addr_to_slab(const void *addr)
 {
 	if (virt_addr_valid(addr))
diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c
index 26a69f0d822c..9602ea4861e2 100644
--- a/mm/kasan/hw_tags.c
+++ b/mm/kasan/hw_tags.c
@@ -35,7 +35,6 @@ enum kasan_arg_vmalloc {
 	KASAN_ARG_VMALLOC_ON,
 };
 
-bool kasan_arg_disabled __ro_after_init;
 static enum kasan_arg_mode kasan_arg_mode __ro_after_init;
 static enum kasan_arg_vmalloc kasan_arg_vmalloc __initdata;
 
@@ -75,23 +74,6 @@ unsigned int kasan_page_alloc_sample_order = PAGE_ALLOC_SAMPLE_ORDER_DEFAULT;
 
 DEFINE_PER_CPU(long, kasan_page_alloc_skip);
 
-/* kasan=off/on */
-static int __init early_kasan_flag(char *arg)
-{
-	if (!arg)
-		return -EINVAL;
-
-	if (!strcmp(arg, "off"))
-		kasan_arg_disabled = true;
-	else if (!strcmp(arg, "on"))
-		kasan_arg_disabled = false;
-	else
-		return -EINVAL;
-
-	return 0;
-}
-early_param("kasan", early_kasan_flag);
-
 /* kasan.mode=sync/async/asymm */
 static int __init early_kasan_mode(char *arg)
 {
-- 
2.52.0



WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: kasan-dev@googlegroups.com
Cc: linux-mm@kvack.org, andreyknvl@gmail.com, ryabinin.a.a@gmail.com,
	glider@google.com, dvyukov@google.com,
	linux-kernel@vger.kernel.org, linux-um@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
	linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org,
	x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com,
	linux-s390@vger.kernel.org, hca@linux.ibm.com,
	Baoquan He <bhe@redhat.com>
Subject: [PATCH v5 03/15] mm/kasan: mm/kasan: move kasan= code to common place
Date: Wed, 25 Feb 2026 16:14:00 +0800	[thread overview]
Message-ID: <20260225081412.76502-4-bhe@redhat.com> (raw)
In-Reply-To: <20260225081412.76502-1-bhe@redhat.com>

This allows generic and sw_tags to be set in kernel cmdline too.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 include/linux/kasan-enabled.h |  2 ++
 mm/kasan/common.c             | 21 +++++++++++++++++++++
 mm/kasan/hw_tags.c            | 18 ------------------
 3 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/include/linux/kasan-enabled.h b/include/linux/kasan-enabled.h
index 9eca967d8526..b7cb906825ca 100644
--- a/include/linux/kasan-enabled.h
+++ b/include/linux/kasan-enabled.h
@@ -35,6 +35,8 @@ static inline void kasan_enable(void) {}
 #endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */
 
 #ifdef CONFIG_KASAN_HW_TAGS
+extern bool kasan_arg_disabled;
+
 static inline bool kasan_hw_tags_enabled(void)
 {
 	return kasan_enabled();
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index b7d05c2a6d93..0d788a468e96 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -42,6 +42,27 @@ DEFINE_STATIC_KEY_FALSE(kasan_flag_enabled);
 EXPORT_SYMBOL_GPL(kasan_flag_enabled);
 #endif
 
+#ifdef CONFIG_KASAN_HW_TAGS
+bool kasan_arg_disabled __ro_after_init;
+
+/* kasan=off/on */
+static int __init early_kasan_flag(char *arg)
+{
+	if (!arg)
+		return -EINVAL;
+
+	if (!strcmp(arg, "off"))
+		kasan_arg_disabled = true;
+	else if (!strcmp(arg, "on"))
+		kasan_arg_disabled = false;
+	else
+		return -EINVAL;
+
+	return 0;
+}
+early_param("kasan", early_kasan_flag);
+#endif
+
 struct slab *kasan_addr_to_slab(const void *addr)
 {
 	if (virt_addr_valid(addr))
diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c
index 26a69f0d822c..9602ea4861e2 100644
--- a/mm/kasan/hw_tags.c
+++ b/mm/kasan/hw_tags.c
@@ -35,7 +35,6 @@ enum kasan_arg_vmalloc {
 	KASAN_ARG_VMALLOC_ON,
 };
 
-bool kasan_arg_disabled __ro_after_init;
 static enum kasan_arg_mode kasan_arg_mode __ro_after_init;
 static enum kasan_arg_vmalloc kasan_arg_vmalloc __initdata;
 
@@ -75,23 +74,6 @@ unsigned int kasan_page_alloc_sample_order = PAGE_ALLOC_SAMPLE_ORDER_DEFAULT;
 
 DEFINE_PER_CPU(long, kasan_page_alloc_skip);
 
-/* kasan=off/on */
-static int __init early_kasan_flag(char *arg)
-{
-	if (!arg)
-		return -EINVAL;
-
-	if (!strcmp(arg, "off"))
-		kasan_arg_disabled = true;
-	else if (!strcmp(arg, "on"))
-		kasan_arg_disabled = false;
-	else
-		return -EINVAL;
-
-	return 0;
-}
-early_param("kasan", early_kasan_flag);
-
 /* kasan.mode=sync/async/asymm */
 static int __init early_kasan_mode(char *arg)
 {
-- 
2.52.0


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linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  parent reply	other threads:[~2026-02-25  8:15 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-25  8:13 [PATCH v5 00/15] mm/kasan: make kasan=on|off work for all three modes Baoquan He
2026-02-25  8:13 ` Baoquan He
2026-02-25  8:13 ` [PATCH v5 01/15] mm/kasan: add conditional checks in functions to return directly if kasan is disabled Baoquan He
2026-02-25  8:13   ` Baoquan He
2026-02-25  8:13 ` [PATCH v5 02/15] mm/kasan: rename 'kasan_arg' to 'kasan_arg_disabled' Baoquan He
2026-02-25  8:13   ` Baoquan He
2026-02-25  8:14 ` Baoquan He [this message]
2026-02-25  8:14   ` [PATCH v5 03/15] mm/kasan: mm/kasan: move kasan= code to common place Baoquan He
2026-02-25  8:14 ` [PATCH v5 04/15] mm/kasan: make kasan=on|off take effect for all three modes Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 05/15] mm/kasan/sw_tags: don't initialize kasan if it's disabled Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 06/15] arch/arm: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 07/15] arch/arm64: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 08/15] arch/loongarch: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 09/15] arch/powerpc: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-03-12 11:12   ` Sourabh Jain
2026-03-12 11:12     ` Sourabh Jain
2026-03-12 11:23     ` Christophe Leroy (CS GROUP)
2026-03-12 11:23       ` Christophe Leroy (CS GROUP)
2026-03-17  2:10       ` Baoquan He
2026-03-17  2:10         ` Baoquan He
2026-03-17  2:39       ` Sourabh Jain
2026-03-17  2:39         ` Sourabh Jain
2026-02-25  8:14 ` [PATCH v5 10/15] arch/riscv: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 11/15] arch/x86: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 12/15] arch/xtensa: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 13/15] arch/um: " Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-02-25  8:14 ` [PATCH v5 14/15] mm/kasan: add document into kernel-parameters.txt Baoquan He
2026-02-25  8:14   ` Baoquan He
2026-03-12 12:53   ` Samuel Holland
2026-03-12 12:53     ` Samuel Holland
2026-03-17  3:36     ` Baoquan He
2026-03-17  3:36       ` Baoquan He
2026-03-17  3:49       ` Samuel Holland
2026-03-17  3:49         ` Samuel Holland
2026-02-25  8:14 ` [PATCH v5 15/15] mm/kasan: clean up unneeded ARCH_DEFER_KASAN and kasan_arch_is_ready Baoquan He
2026-02-25  8:14   ` Baoquan He

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