--- zzzz-none-000/linux-3.10.107/arch/x86/um/stub_64.S	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/x86/um/stub_64.S	2021-02-04 17:41:59.000000000 +0000
@@ -1,25 +1,9 @@
 #include <as-layout.h>
 
-	.globl syscall_stub
 .section .__syscall_stub, "ax"
-syscall_stub:
-	syscall
-	/* We don't have 64-bit constants, so this constructs the address
-	 * we need.
-	 */
-	movq	$(STUB_DATA >> 32), %rbx
-	salq	$32, %rbx
-	movq	$(STUB_DATA & 0xffffffff), %rcx
-	or	%rcx, %rbx
-	movq	%rax, (%rbx)
-	int3
-
 	.globl batch_syscall_stub
 batch_syscall_stub:
-	mov	$(STUB_DATA >> 32), %rbx
-	sal	$32, %rbx
-	mov	$(STUB_DATA & 0xffffffff), %rax
-	or	%rax, %rbx
+	mov	$(STUB_DATA), %rbx
 	/* load pointer to first operation */
 	mov	%rbx, %rsp
 	add	$0x10, %rsp