hello,

the following is the error found...
-----------------------------------------------------------------------------------
protection_keys.c:421:5: error: conflicting types for ‘pkey_set’
 int pkey_set(int pkey, unsigned long rights, unsigned long flags)
     ^~~~~~~~
------------------------------------------------------------------------------------

to reproduce this error...

make -C tools/testing/selftests

Details about software:

Linux debian 4.17.0-rc1+ #1 SMP Thu Apr 19 18:59:45 IST 2018 x86_64
GNU/Linux

GNU Make            4.2.1
Binutils            2.30
Util-linux          2.31.1
Mount                2.31.1
Linux C Library      2.27
Dynamic linker (ldd) 2.27
readlink: missing operand
Try 'readlink --help' for more information.
Procps              3.3.14
Kbd                  2.0.4
Console-tools        2.0.4
Sh-utils            8.28
Udev                238

-- 
software engineer
rajagiri school of engineering and technology