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([2a00:23c4:e5c9:901:c496:8838:86d0:bc8c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a178c4008esm115356995e9.6.2026.10.06.22.45.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Oct 2026 22:45:08 -0700 (PDT) Message-ID: Subject: Re: [PATCH] kbuild: install-extmod-build: install kernel/kallsyms_internal.h From: Christopher Obbard To: Denis Benato , linux-kbuild@vger.kernel.org Cc: nathan@kernel.org, nsc@kernel.org, thomas.weissschuh@linutronix.de, chewi@gentoo.org, abelvesa@kernel.org, linux-kernel@vger.kernel.org Date: Wed, 07 Oct 2026 06:45:07 +0100 In-Reply-To: <20261005200123.146822-1-denis.benato@linux.dev> References: <20261005200123.146822-1-denis.benato@linux.dev> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-10 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-GUID: Y6GEIkq3x1LONInGn-7s3C289YUZ-gp4 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDA3MDAyMiBTYWx0ZWRfX3rJscvgmgPT+ bpN115DMC2FNgPTL4NYd1bah9eEDlbMPBPqQagtZIggzSyyWp58ivQYrK+kDHflhySbwOpWRniS uQlxjJjOf5tl+M2I8Ikd1AWvczo0PFc= X-Authority-Analysis: v=2.4 cv=XZYcX455 c=1 sm=1 tr=0 ts=6ac5dc67 cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=EUspDBNiAAAA:8 a=DS7L5C3jCFOg1gsKO-oA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDA3MDAyMiBTYWx0ZWRfX4k59g8Qp5FR3 LxquDcLk6/wq+W+5f2ABHugrXDzxxEXa4iJm4DyDNaER3E/Sxtxe/U5c1biF8848CzZ8/QU0rfn Rnzn51iBCmnbgBpSluzVe2oBz9Gfn46D0VJ4vmHvT6IQtzC7A1b6SKhuMIici52LBI4oNLjwI6W FMJL59WMJwGco9rOCefA72WBQ/dDHfEem+QnDVffvHhhQIWpWVxBrgVH5GQYFo2rQDIt8sKVRsF lDO1g+TNWYeYq8VBezkGozpMAOfUzC+7KA0v7ecnVDQHi6dUdcEJNvMXaOkwUVdzWeMd6xF1NZn WqAsK0nBDE0fSaVy0EPKLhShnFn9s84M2e3zU7QEER3VTE5zUH7/QZLrDfbwtPCJ3V03L66N4yU LvAqgcEdND6S3IAvGEVAQrwUgBoxzG8PkCqXgJpNbompLu6ZVGjPGSkR6DE3DhnNju1FRk62AZw i6Er3WmiRlDkkxU+toA== X-Proofpoint-ORIG-GUID: Y6GEIkq3x1LONInGn-7s3C289YUZ-gp4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-07_02,2026-10-06_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 priorityscore=1501 impostorscore=0 bulkscore=0 suspectscore=0 clxscore=1015 phishscore=0 adultscore=0 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2610070022 Hi Denis, On Mon, 2026-10-05 at 20:01 +0000, Denis Benato wrote: > The tree staged by install-extmod-build contains no kernel/ files, but > since commit 4fafd1165b33 ("kallsyms: increase marker density to 16:1 > to accelerate lookups") scripts/kallsyms.c includes > ../kernel/kallsyms_internal.h. >=20 > install-extmod-build rebuilds the host programs inside the staged tree > whenever CC differs from HOSTCC (cross builds, or a ccache-wrapped CC). > scripts/kallsyms is hostprogs-always-y, so that rebuild fails with: >=20 > scripts/kallsyms.c:39:10: fatal error: '../kernel/kallsyms_internal.h' = file not found > 39 | #include "../kernel/kallsyms_internal.h" > | ^~~~~~~ >=20 > Stage the header so the linux-headers-* and kernel-devel style packages > can rebuild scripts/kallsyms. >=20 > Fixes: 4fafd1165b33 ("kallsyms: increase marker density to 16:1 to accele= rate lookups") > Assisted-by: ZCode:glm-5.3 > Signed-off-by: Denis Benato I can confirm that this fixes the build failure introduced in "kallsyms: increase marker density to 16:1 to accelerate lookups" when building with CC !=3D HOSTCC. Whether we should expose kallsyms_internal.h as part of the external module build is a separate question, but your patch as posted does resolve the issue I was seeing. Please keep me in CC. Tested-by: Christopher Obbard Cheers! Chris > --- > scripts/package/install-extmod-build | 2 ++ > 1 file changed, 2 insertions(+) >=20 > diff --git a/scripts/package/install-extmod-build b/scripts/package/insta= ll-extmod-build > index f12e1ffe409eb..aad2cd59a37ba 100755 > --- a/scripts/package/install-extmod-build > +++ b/scripts/package/install-extmod-build > @@ -20,6 +20,8 @@ mkdir -p "${destdir}" > ( > cd "${srctree}" > echo Makefile > + # scripts/kallsyms.c includes this header > + echo kernel/kallsyms_internal.h > find "arch/${SRCARCH}" -maxdepth 1 -name 'Makefile*' > find "arch/${SRCARCH}" -name generated -prune -o -name include -type d = -print > find "arch/${SRCARCH}" -name Kbuild.platforms -o -name Platform