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Wed, 21 Jan 2026 03:05:53 -0800 (PST) From: Breno Leitao Date: Wed, 21 Jan 2026 03:05:44 -0800 Subject: [PATCH] vmcoreinfo: make hwerr_data visible for debugging 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="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260121-fix_vmcoreinfo-v1-1-39e96fab670e@debian.org> X-B4-Tracking: v=1; b=H4sIAAezcGkC/yXMQQqDMBAF0KsMf20gCdjQXEVEbDrREUwkaUUQ7 17aLt/mnahchCs8nSi8S5Wc4Mk0hDCPaWIlT3iC1famjTUqyjHsa8iFJcWstGnvNjrdjs6hIWy Foxy/sOv/ru/HwuH1XXBdHyVW2mtyAAAA X-Change-ID: 20260121-fix_vmcoreinfo-01592f705a77 To: akpm@linux-foundation.org, bhe@redhat.com Cc: vgoyal@redhat.com, dyoung@redhat.com, xueshuai@linux.alibaba.com, tony.luck@intel.com, linux-kernel@vger.kernel.org, osandov@osandov.com, kernel-team@meta.com, Breno Leitao X-Mailer: b4 0.15-dev-47773 X-Developer-Signature: v=1; a=openpgp-sha256; l=1168; i=leitao@debian.org; h=from:subject:message-id; bh=xoEp5QS6L6l21sCNdsyZrwKGiRM5ipga5Tcm2LAi/wI=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBpcLMQIZW/NzznooT+C5RKlNhCa6NjsPKWld0N+ AFGzN7dLo+JAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaXCzEAAKCRA1o5Of/Hh3 bTOND/9A6hF3LTc6dXxvz+KTbS+s0quKKjLdXY1UMvj1AHRKIM3YrASHEhd1m+STzKT7bqGjxqW oE3muyyOdiMeK6V/qjODvdRHChohmqpo9CRFrV1urr3S2bIcRCcdRzRFvNTKvfx8N/OnEHWsQcr h5mQ+ym040IdMgPaXtrfAk8GDPGcRC4tIX0Fm4dqgWX3OQ82/3YGU3FktYcRPx2Uxp00t6uOiyY DvWHLrE5Cdbn+ptdNZgBSg50tFIzIH4uCHJFKqybqmozb/LaMw/O+doou0ZMfNawb98rcnq1eQv S1TAo+eTqdsGiBLiUTaItFQiFroB8EnM2/2cL/FnHIZNHTzj+dxPd/6GRRDYE3Ck4+AP+zym3la QZkPuY/XsJl7qY+/NM1Gxg6xL+RZbvVuyZHe0K65tt6IYKUJ91gb6lna/Q1z2Y0a3PilKqiJUbp uf9t9dmrNdV93GKRNDy4QpOrahKwBAmY7EYPu88xCu2SN/zK8COU8HCSSELhFAk6k8bbBtLNnMT 1uJtqf3xm/pUIAgYDk1cUU2uvjYIihR2yEPTySl30FkP6Hec8h6l4+HD0Z/4QdFOzubOUzzW2EF IBi+Ouz2V+Rh1mWNkq5Navbiu5Uc/dEOn9YzhBJgM/T3PCfcGn1HxMwxslxqFA2DHmCbyJrW/Z+ Fz2KEt8gcEJSUeg== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D If the kernel is compiled with LTO, hwerr_data symbol might be lost, and vmcoreinfo doesn't have it dumped. This is currently seen in some production kernels with LTO enabled. Remove the static qualifier from hwerr_data so that the information is still preserved when the kernel is built with LTO. Making hwerr_data a global symbol ensures its debug info survives the LTO link process and appears in kallsyms. Signed-off-by: Breno Leitao --- kernel/vmcore_info.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/vmcore_info.c b/kernel/vmcore_info.c index 22b3205dd4dc5..1f42818f77cef 100644 --- a/kernel/vmcore_info.c +++ b/kernel/vmcore_info.c @@ -36,7 +36,7 @@ struct hwerr_info { time64_t timestamp; }; =20 -static struct hwerr_info hwerr_data[HWERR_RECOV_MAX]; +struct hwerr_info hwerr_data[HWERR_RECOV_MAX]; =20 Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type, void *data, size_t data_len) --- base-commit: 053966c344dbd346e71305f530e91ea77916189f change-id: 20260121-fix_vmcoreinfo-01592f705a77 Best regards, -- =20 Breno Leitao