On Wed, Sep 23, 2026 at 08:42:13AM +0100, Vincent Donnefort wrote:
> simple_ring_buffer relies on headers that end up including
> <asm/thread_info.h>. On sparc64, this emits the undefined symbol
> current_thread_info_reg. Allow this symbol.
>
> Fixes: 1211907ac0b5 ("tracing: Generate undef symbols allowlist for
> simple_ring_buffer")
> Reported-by: Guenter Roeck <[email protected]>
> Closes:
> https://lore.kernel.org/all/[email protected]/
> Signed-off-by: Vincent Donnefort <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
> ---
> kernel/trace/Makefile | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
> index 0e1846f7dda3..3860bc53a4be 100644
> --- a/kernel/trace/Makefile
> +++ b/kernel/trace/Makefile
> @@ -146,6 +146,7 @@ KASAN_SANITIZE_undefsyms_base.o := y
>
> UNDEFINED_ALLOWLIST = __asan __gcov __kasan __kcsan __hwasan __sancov
> __sanitizer __tsan __ubsan __msan \
> __aeabi_unwind_cpp __s390_indirect_jump
> __x86_indirect_thunk simple_ring_buffer \
> + current_thread_info_reg \
> $(shell $(NM) -u $(obj)/undefsyms_base.o 2>/dev/null |
> awk '$$2 {print $$2}')
>
> quiet_cmd_check_undefined = NM $<
> --
> 2.55.0.1082.g2b9226bbc0-goog
>
