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2a52ca7c98("sched_ext: Add scx_simple and scx_example_qmap example schedulers") added the tools_clean target which is triggered by mrproper. The tools_clean target triggers the sched_ext_clean target in tools/. This unfortunately makes mrproper fail when no BTF enabled kernel image is found: Makefile:83: *** Cannot find a vmlinux for VMLINUX_BTF at any of " ../../vmlinux /sys/kernel/btf/vmlinux/boot/vmlinux-4.15.0-136-generic". Stop. Makefile:192: recipe for target 'sched_ext_clean' failed make[2]: *** [sched_ext_clean] Error 2 Makefile:1361: recipe for target 'sched_ext' failed make[1]: *** [sched_ext] Error 2 Makefile:240: recipe for target '__sub-make' failed make: *** [__sub-make] Error 2 Clean targets shouldn't fail like this but also it's really odd for mrproper to single out and trigger the sched_ext_clean target when no other clean targets under tools/ are triggered. Fix builds by dropping the tools_clean target from the top-level Makefile. The offending Makefile line is shared across BPF targets under tools/. Let's revisit them later. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Jon Hunter <jonathanh@nvidia.com> Link: http://lkml.kernel.org/r/ac065f1f-8754-4626-95db-2c9fcf02567b@nvidia.com Fixes:2a52ca7c98("sched_ext: Add scx_simple and scx_example_qmap example schedulers") Cc: David Vernet <void@manifault.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.