On 1/17/20 4:49 AM, Sandipan Das wrote:

Memory protection keys enables an application to protect its address
space from inadvertent access by its own code.

This feature is now enabled on powerpc and has been available since
4.16-rc1. The patches move the selftests to arch neutral directory
and enhance their test coverage.

Tested on powerpc64 and x86_64 (Skylake-SP).

I also tested the series.  The 64-bit binary works fine.  But,

This is failing to build the x86 selftests:

make: *** No rule to make target 'protection_keys.c', needed by
'/home/daveh/linux/tools/testing/selftests/x86/protection_keys_32'.  Stop.

I think you just forgot to remove the binary from the x86 Makefile.

Which reminds me: This removes the 32-bit binary.  x86 32-bit binaries
exercise different paths than the 64-bit ones, so we like to have both.
 Although it isn't *essential* it would really be nice to keep the
32-bit binary.