2 files changed, 10 insertions, 4 deletions

diff --git a/arch/arm/kernel/elf.c b/arch/arm/kernel/elf.c
index d4a0da1e48f4..950391f194c4 100644
--- a/arch/arm/kernel/elf.c
+++ b/arch/arm/kernel/elf.c
@@ -78,6 +78,15 @@ int arm_elf_read_implies_exec(const struct elf32_hdr *x, int executable_stack)
                 return 1;
         if (cpu_architecture() < CPU_ARCH_ARMv6)
                 return 1;
+#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
+        /*
+         * If we have support for OABI programs, we can never allow NX
+         * support - our signal syscall restart mechanism relies upon
+         * being able to execute code placed on the user stack.
+         */
+        return 1;
+#else
         return 0;
+#endif
 }
 EXPORT_SYMBOL(arm_elf_read_implies_exec);
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index d662a2f1fd85..83b1da6b7baa 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -815,10 +815,7 @@ __kuser_helper_start:
  */
 
 __kuser_memory_barrier:                         @ 0xffff0fa0
-
-#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_SMP)
-        mcr     p15, 0, r0, c7, c10, 5  @ dmb
-#endif
+        smp_dmb
         usr_ret lr
 
         .align  5