[PATCH mm v4 33/39] kasan: mark kasan_arg_stacktrace as __initdata
From: <hidden>
Date: 2021-12-20 22:03:00
Also in:
linux-arm-kernel, lkml
Subsystem:
kasan, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
From: Andrey Konovalov <redacted> As kasan_arg_stacktrace is only used in __init functions, mark it as __initdata instead of __ro_after_init to allow it be freed after boot. The other enums for KASAN args are used in kasan_init_hw_tags_cpu(), which is not marked as __init as a CPU can be hot-plugged after boot. Clarify this in a comment. Signed-off-by: Andrey Konovalov <redacted> Suggested-by: Marco Elver <elver@google.com> --- Changes v1->v2: - Add this patch. --- mm/kasan/hw_tags.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c
index 2e9378a4f07f..6509809dd5d8 100644
--- a/mm/kasan/hw_tags.c
+++ b/mm/kasan/hw_tags.c@@ -40,7 +40,7 @@ enum kasan_arg_stacktrace { static enum kasan_arg kasan_arg __ro_after_init; static enum kasan_arg_mode kasan_arg_mode __ro_after_init; -static enum kasan_arg_stacktrace kasan_arg_stacktrace __ro_after_init; +static enum kasan_arg_stacktrace kasan_arg_stacktrace __initdata; /* Whether KASAN is enabled at all. */ DEFINE_STATIC_KEY_FALSE(kasan_flag_enabled);
@@ -116,7 +116,10 @@ static inline const char *kasan_mode_info(void) return "sync"; } -/* kasan_init_hw_tags_cpu() is called for each CPU. */ +/* + * kasan_init_hw_tags_cpu() is called for each CPU. + * Not marked as __init as a CPU can be hot-plugged after boot. + */ void kasan_init_hw_tags_cpu(void) { /*
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2.25.1