I need to include <asm/barrier.h> and <asm/msr.h>. I see them (in /usr/src/linux-headers-6.5.0-27/arch/x86/include/asm but cmake doesn’t. I tried:

  find_path(KERNELHEADERS_DIR
    include/asm/barrier.h
  )

…and:

execute_process(
  COMMAND uname -r
  OUTPUT_VARIABLE KERNEL_RELEASE
  OUTPUT_STRIP_TRAILING_WHITESPACE
)

string(REPLACE "-generic" "" KERNEL_RELEASE  "${KERNEL_RELEASE}")

# Find the headers
find_path(KERNELHEADERS_DIR
  include/asm/barrier.h
  PATHS /usr/src/linux-headers-${KERNEL_RELEASE}
)

…and variations thereof, but it stubbornly returns /usr/src/linux-headers-6.5.0-28-generic.

I don’t need a super complete solution, I just need it to work on Ubuntu (it’s for YOMM2’s benchmarks, not a public, documented thing).

Help?