+When I compiled uml on x86_64, I got this warning:
+
+ MODPOST vmlinux.o
+WARNING: vmlinux.o (.__syscall_stub.2): unexpected non-allocatable section.
+Did you forget to use "ax"/"aw" in a .S file?
+Note that for example <linux/init.h> contains
+section definitions for use in .S files.
+
+Because modpost checks for missing SHF_ALLOC section flag. So just
+add it. :)
+
+Signed-off-by: WANG Cong <amwang@redhat.com>
+Cc: Jeff Dike <jdike@addtoit.com>
+Cc: Sam Ravnborg <sam@ravnborg.org>
+
+---
+--- a/arch/um/sys-x86_64/stub.S
++++ b/arch/um/sys-x86_64/stub.S
+@@ -1,7 +1,7 @@
+ #include "as-layout.h"
+
+ .globl syscall_stub
+-.section .__syscall_stub, "x"
++.section .__syscall_stub, "ax"
+ syscall_stub:
+ syscall
+ /* We don't have 64-bit constants, so this constructs the address
+--- a/arch/um/sys-i386/stub.S
++++ b/arch/um/sys-i386/stub.S
+@@ -1,7 +1,7 @@
+ #include "as-layout.h"
+
+ .globl syscall_stub
+-.section .__syscall_stub, "x"
++.section .__syscall_stub, "ax"
+
+ .globl batch_syscall_stub
+ batch_syscall_stub: