powerpc: sys_pkey_mprotect() system call

Patch provides the ability for a process to
associate a pkey with a address range.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/systbl.h

@@ -391,3 +391,4 @@ SYSCALL(kexec_file_load)
 SYSCALL(statx)
 SYSCALL(pkey_alloc)
 SYSCALL(pkey_free)
+SYSCALL(pkey_mprotect)

arch/powerpc/include/asm/unistd.h

@@ -12,12 +12,10 @@
 #include <uapi/asm/unistd.h>
 
 
-#define NR_syscalls		386
+#define NR_syscalls		387
 
 #define __NR__exit __NR_exit
 
-#define __IGNORE_pkey_mprotect
-
 #ifndef __ASSEMBLY__
 
 #include <linux/types.h>

arch/powerpc/include/uapi/asm/unistd.h

@@ -397,5 +397,6 @@
 #define __NR_statx		383
 #define __NR_pkey_alloc		384
 #define __NR_pkey_free		385
+#define __NR_pkey_mprotect	386
 
 #endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */