Merge tag 'linux_kselftest-next-6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
 "Revert framework change to add D_GNU_SOURCE to KHDR_INCLUDES to
  Makefile, lib.mk, and kselftest_harness.h and follow-on changes to
  cgroup and sgx test as they are causing build failures and warnings"

* tag 'linux_kselftest-next-6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  Revert "selftests/cgroup: Drop define _GNU_SOURCE"
  Revert "selftests/sgx: Include KHDR_INCLUDES in Makefile"
  Revert "selftests: Compile kselftest headers with -D_GNU_SOURCE"