Before defining PAGE_SIZE in x86's processor.h, explicitly include the system's limits.h and #undef PAGE_SIZE to workaround a conflict when using musl where musl defines PAGE_SIZE as a signed 32-bit value, but KVM expects it to be (and effectively requires it to be) an unsigned 64-bit value. Reported-by: Aqib Faruqui Link: https://lore.kernel.org/kvm/aL8e0MMa4U2-nstQ@google.com Cc: Hisam Mehboob Signed-off-by: Sean Christopherson --- v2: - Limit the hackery to KVM x86 selftests. - Ensure limits.h is included before PAGE_SIZE can get defined by processor.h v1: https://lore.kernel.org/all/20260507234854.273536-2-hisamshar@gmail.com tools/testing/selftests/kvm/include/x86/processor.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86/processor.h b/tools/testing/selftests/kvm/include/x86/processor.h index 5898a277a2e0..65fda03ea893 100644 --- a/tools/testing/selftests/kvm/include/x86/processor.h +++ b/tools/testing/selftests/kvm/include/x86/processor.h @@ -6,6 +6,14 @@ #ifndef SELFTEST_KVM_PROCESSOR_H #define SELFTEST_KVM_PROCESSOR_H +/* + * Explicitly include the system's limit.h and undefine PAGE_SIZE to workaround + * an incompatibility where musl defines PAGE_SIZE as a signed integer, whereas + * KVM selftests expect it to be a 64-bit unsigned value. + */ +#include +#undef PAGE_SIZE + #include #include #include base-commit: cf7fa575900051e489f95944c65f432ea706ed73 -- 2.56.0.542.g3ef89b7020-goog