On Thu, Mar 12, 2026 at 01:35:43PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann <[email protected]> > > Randconfig builds show a number of cryptic build errors from > hitting undefined symbols in simple_ring_buffer.o: > > make[7]: *** [/home/arnd/arm-soc/kernel/trace/Makefile:147: > kernel/trace/simple_ring_buffer.o.checked] Error 1 > > These happen with CONFIG_TRACE_BRANCH_PROFILING, CONFIG_KASAN_HW_TAGS, > CONFIG_STACKPROTECTOR, CONFIG_DEBUG_IRQFLAGS and indirectly from WARN_ON(). > > Add exceptions for each one that I have hit so far on arm64, x86_64 and arm > randconfig builds. > > Other architectures likely hit additional ones, so it would be nice > to produce a little more verbose output that include the name of the > missing symbols directly. > > Fixes: a717943d8ecc ("tracing: Check for undefined symbols in > simple_ring_buffer") > Signed-off-by: Arnd Bergmann <[email protected]> > --- > kernel/trace/Makefile | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile > index 3182e1bc1cf7..e3f8d6e619d2 100644 > --- a/kernel/trace/Makefile > +++ b/kernel/trace/Makefile > @@ -138,6 +138,8 @@ obj-$(CONFIG_TRACE_REMOTE_TEST) += remote_test.o > # > UNDEFINED_ALLOWLIST := memset alt_cb_patch_nops __x86 __ubsan __asan __kasan > __gcov __aeabi_unwind > UNDEFINED_ALLOWLIST += __stack_chk_fail stackleak_track_stack __ref_stack > __sanitizer > +UNDEFINED_ALLOWLIST += ftrace_likely_update __hwasan_load __hwasan_store > __hwasan_tag_memory > +UNDEFINED_ALLOWLIST += warn_bogus_irq_restore warn_slowpath_fmt > __stack_chk_guard > UNDEFINED_ALLOWLIST := $(addprefix -e , $(UNDEFINED_ALLOWLIST)) > > quiet_cmd_check_undefined = NM $< > -- > 2.39.5 >
Thanks for the patch. Most of those ones are covered here https://lore.kernel.org/all/[email protected]/. This should fix allmodconfig. For the ones not covered, I'm working on a follow-up patch using a different approach which should fix them. I'll be able to share it today or tomorrow. Not sure if we want to take this temporarily?
