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[34.140.115.198]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4854b5e92d5sm129868785e9.1.2026.03.12.06.40.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Mar 2026 06:40:29 -0700 (PDT) Date: Thu, 12 Mar 2026 13:40:26 +0000 From: Vincent Donnefort To: Arnd Bergmann Cc: Marc Zyngier , Steven Rostedt , Oliver Upton , Catalin Marinas , Will Deacon , Arnd Bergmann , Masami Hiramatsu , Mathieu Desnoyers , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: Re: [PATCH 2/3] tracing: add more symbols to whitelist Message-ID: References: <20260312123601.625063-1-arnd@kernel.org> <20260312123601.625063-2-arnd@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260312123601.625063-2-arnd@kernel.org> On Thu, Mar 12, 2026 at 01:35:43PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > 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 > --- > 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/20260312113535.2213350-1-vdonnefort@google.com/. 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?