[PATCH mm 2/2] Revert "kasan, arm64: don't allow SW_TAGS with ARM64_MTE"

[Andrey Konovalov]

This reverts "kasan, arm64: don't allow SW_TAGS with ARM64_MTE".

In earlier versions on the hardware tag-based KASAN patchset in-kernel
MTE used to be always enabled when CONFIG_ARM64_MTE is on. This caused
conflicts with the software tag-based KASAN mode.

This is no logner the case: in-kernel MTE is never enabled unless the
CONFIG_KASAN_HW_TAGS is enabled, so there are no more conflicts with
CONFIG_KASAN_SW_TAGS.

Allow CONFIG_KASAN_SW_TAGS to be enabled even when CONFIG_ARM64_MTE is
enabled.

Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
---
 arch/arm64/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6fefab9041d8..62a7668976a2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -135,7 +135,7 @@ config ARM64
 	select HAVE_ARCH_JUMP_LABEL
 	select HAVE_ARCH_JUMP_LABEL_RELATIVE
 	select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
-	select HAVE_ARCH_KASAN_SW_TAGS if (HAVE_ARCH_KASAN && !ARM64_MTE)
+	select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN
 	select HAVE_ARCH_KASAN_HW_TAGS if (HAVE_ARCH_KASAN && ARM64_MTE)
 	select HAVE_ARCH_KFENCE
 	select HAVE_ARCH_KGDB
-- 
2.29.2.576.ga3fc446d84-goog