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Commit49de12ba06("selftests: drop KSFT_KHDR_INSTALL make target") dropped from tools/testing/selftests/lib.mk the code related to KSFT_KHDR_INSTALL, but in doing so it also dropped the definition of the ARCH variable. The ARCH variable is used in several subdirectories, but kvm/ is the only one of these that was using KSFT_KHDR_INSTALL. As a result, kvm selftests cannot be built anymore: In file included from include/x86_64/vmx.h:12, from x86_64/vmx_pmu_caps_test.c:18: include/x86_64/processor.h:15:10: fatal error: asm/msr-index.h: No such file or directory 15 | #include <asm/msr-index.h> | ^~~~~~~~~~~~~~~~~ In file included from ../../../../tools/include/asm/atomic.h:6, from ../../../../tools/include/linux/atomic.h:5, from rseq_test.c:15: ../../../../tools/include/asm/../../arch/x86/include/asm/atomic.h:11:10: fatal error: asm/cmpxchg.h: No such file or directory 11 | #include <asm/cmpxchg.h> | ^~~~~~~~~~~~~~~ Fix it by including the definition that was present in lib.mk. Fixes:49de12ba06("selftests: drop KSFT_KHDR_INSTALL make target") Cc: Guillaume Tucker <guillaume.tucker@collabora.com> Cc: Anders Roxell <anders.roxell@linaro.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.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 Restructured Text 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.