mm/pkeys: generate pkey system call code only if ARCH_HAS_PKEYS is selected

[mirror_ubuntu-bionic-kernel.git] / mm / mprotect.c

diff --git a/mm/mprotect.c b/mm/mprotect.c
index c5ba2aae0f542d03d144057ec49ba9a9fdc36456..cc2459c57f6080f8776cbc81c844137337bb775e 100644 (file)
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -497,6 +497,8 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
        return do_mprotect_pkey(start, len, prot, -1);
 }
 
+#ifdef CONFIG_ARCH_HAS_PKEYS
+
 SYSCALL_DEFINE4(pkey_mprotect, unsigned long, start, size_t, len,
                unsigned long, prot, int, pkey)
 {
@@ -547,3 +549,5 @@ SYSCALL_DEFINE1(pkey_free, int, pkey)
         */
        return ret;
 }
+
+#endif /* CONFIG_ARCH_HAS_PKEYS */