Hi Ram,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.15 next-20180201]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Ram-Pai/mm-x86-powerpc-Enhancements-to-Memory-Protection-Keys/20180202-120004
config: x86_64-randconfig-x005-201804 (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   In file included from arch/x86/include/asm/mmu_context.h:8:0,
                    from arch/x86/events/core.c:36:

quoted

include/linux/pkeys.h:16:23: error: expected identifier or '(' before numeric constant

    #define vma_pkey(vma) 0
                          ^

quoted

arch/x86/include/asm/mmu_context.h:298:19: note: in expansion of macro 'vma_pkey'

    static inline int vma_pkey(struct vm_area_struct *vma)
                      ^~~~~~~~

vim +16 include/linux/pkeys.h

     7	
     8	#ifdef CONFIG_ARCH_HAS_PKEYS
     9	#include <asm/pkeys.h>
    10	#else /* ! CONFIG_ARCH_HAS_PKEYS */
    11	#define arch_max_pkey() (1)
    12	#define execute_only_pkey(mm) (0)
    13	#define arch_override_mprotect_pkey(vma, prot, pkey) (0)
    14	#define PKEY_DEDICATED_EXECUTE_ONLY 0
    15	#define ARCH_VM_PKEY_FLAGS 0
  > 16	#define vma_pkey(vma) 0
    17	

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