[PATCH v5 12/15] arch/xtensa: don't initialize kasan if it's disabled
From: Baoquan He <hidden>
Date: 2026-02-25 08:16:49
Also in:
linux-arm-kernel, linux-mm, linux-riscv, linux-s390, linux-um, lkml, loongarch
Subsystem:
kasan, tensilica xtensa port (xtensa), the rest · Maintainers:
Andrey Ryabinin, Chris Zankel, Max Filippov, Linus Torvalds
Here, kasan is disabled if specified 'kasan=off' in kernel cmdline. And also call jump_label_init() early in setup_arch() so that later kasan_init() can enable static key kasan_flag_enabled. Put jump_label_init() beofre parse_early_param() as other architectures do. Signed-off-by: Baoquan He <redacted> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> --- arch/xtensa/kernel/setup.c | 1 + arch/xtensa/mm/kasan_init.c | 4 ++++ 2 files changed, 5 insertions(+)
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index f72e280363be..aabeb23f41fa 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c@@ -352,6 +352,7 @@ void __init setup_arch(char **cmdline_p) mem_reserve(__pa(_SecondaryResetVector_text_start), __pa(_SecondaryResetVector_text_end)); #endif + jump_label_init(); parse_early_param(); bootmem_init(); kasan_init();
diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c
index 0524b9ed5e63..eb367b801218 100644
--- a/arch/xtensa/mm/kasan_init.c
+++ b/arch/xtensa/mm/kasan_init.c@@ -70,6 +70,10 @@ void __init kasan_init(void) { int i; + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + BUILD_BUG_ON(KASAN_SHADOW_OFFSET != KASAN_SHADOW_START - (KASAN_START_VADDR >> KASAN_SHADOW_SCALE_SHIFT)); BUILD_BUG_ON(VMALLOC_START < KASAN_START_VADDR);
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2.52.0