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Fri, 16 Oct 2026 09:17:59 -0700 (PDT) Received: from [192.168.1.128] ([38.15.57.99]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-842a6f0a55csm2327426a34.25.2026.10.16.09.17.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 16 Oct 2026 09:17:58 -0700 (PDT) Message-ID: <93d5f73d-0126-4727-9014-836e195a3eac@linuxfoundation.org> Date: Fri, 16 Oct 2026 10:17:54 -0600 Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v2 5/7] tools: build kernel selftests in tools_build To: Sasha Levin , Nathan Chancellor , Nicolas Schier , linux-kbuild@vger.kernel.org Cc: Shuah Khan , linux-kselftest@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , linux-perf-users@vger.kernel.org, =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= , Andrew Morton , linux-kernel@vger.kernel.org, Shuah Khan References: <20261016143143.3613501-1-sashal@kernel.org> <20261016143143.3613501-6-sashal@kernel.org> Content-Language: en-US From: Shuah Khan In-Reply-To: <20261016143143.3613501-6-sashal@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/16/26 08:31, Sasha Levin wrote: > Add a "Kernel selftests" sub-menu with one entry per selftests directory > that builds with only a C library and does not write into the source > tree. Each is built as "make kselftest-all" builds it, with KHDR_INCLUDES > pointing at the UAPI headers installed in the object tree, but by its own > make, so the selected ones build in parallel. Selftests whose Makefile > does not use KHDR_INCLUDES still build against the C library's copy of > the UAPI headers. > > As with "make kselftest-all", a selftest that fails to build does not > fail the build unless FORCE_TARGETS is set. kselftest_deps.sh then lists > the libraries the selftest needs that the compiler cannot link with. > > The selftests do not track header dependencies, so a selftest is built > again from scratch when its own directory, a header or makefile any > selftest may share, or the kernel sources and headers it includes (the > vDSO test includes the architecture's vDSO code) are newer than its last > build. > > Selftests that need libraries beyond the C library, a vmlinux with BTF, > or a sanitizer runtime are left out for now. > > Assisted-by: LLM > Signed-off-by: Sasha Levin Thank you. Reviewed-by: Shuah Khan thanks, -- Shuah