On Wed, Sep 23, 2026 at 08:42:11AM +0100, Vincent Donnefort wrote:
> Sparc64 emits empty symmbol names. Skips them when establishing the
> allowlist and when extracing undefined symbols.
>
> 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 | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
> index f934ff586bd4..0e1846f7dda3 100644
> --- a/kernel/trace/Makefile
> +++ b/kernel/trace/Makefile
> @@ -146,11 +146,11 @@ 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 \
> - $(shell $(NM) -u $(obj)/undefsyms_base.o 2>/dev/null |
> awk '{print $$2}')
> + $(shell $(NM) -u $(obj)/undefsyms_base.o 2>/dev/null |
> awk '$$2 {print $$2}')
>
> quiet_cmd_check_undefined = NM $<
> cmd_check_undefined = \
> - undefsyms=$$($(NM) -u $< | grep -v $(addprefix -e ,
> $(UNDEFINED_ALLOWLIST)) || true); \
> + undefsyms=$$($(NM) -u $< | awk '$$2 {print $$2}' | grep -v
> $(addprefix -e , $(UNDEFINED_ALLOWLIST)) || true); \
> if [ -n "$$undefsyms" ]; then \
> echo "Unexpected symbols in $<:" >&2; \
> echo "$$undefsyms" >&2; \
> --
> 2.55.0.1082.g2b9226bbc0-goog
>
