Index: clean-start/arch/x86_64/kernel/entry.S
===================================================================
--- clean-start.orig/arch/x86_64/kernel/entry.S
+++ clean-start/arch/x86_64/kernel/entry.S
@@ -241,6 +241,7 @@ ENTRY(system_call)
 	GET_THREAD_INFO(%rcx)
 	testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%rcx)
 	jnz tracesys
+	jmp logdev_trace
 	cmpq $__NR_syscall_max,%rax
 	ja badsys
 	movq %r10,%rcx
@@ -312,6 +313,25 @@ badsys:
 	movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
 	jmp ret_from_sys_call
 
+	/* Do logdev tracing */
+logdev_trace:			 
+	SAVE_REST
+	movq $-ENOSYS,RAX(%rsp)
+	FIXUP_TOP_OF_STACK %rdi
+	movq %rsp,%rdi
+	call logdev_syscall_trace_enter
+	LOAD_ARGS ARGOFFSET  /* reload args from stack in case ptrace changed it */
+	RESTORE_REST
+	cmpq $__NR_syscall_max,%rax
+	movq $-ENOSYS,%rcx
+	cmova %rcx,%rax
+	ja  1f
+	movq %r10,%rcx	/* fixup for C */
+	call *sys_call_table(,%rax,8)
+1:	movq %rax,RAX-ARGOFFSET(%rsp)
+	/* Use IRET because user could have changed frame */
+	jmp int_ret_from_sys_call
+
 	/* Do syscall tracing */
 tracesys:			 
 	SAVE_REST
Index: clean-start/kernel/logdev/logdev.c
===================================================================
--- clean-start.orig/kernel/logdev/logdev.c
+++ clean-start/kernel/logdev/logdev.c
@@ -1258,6 +1258,12 @@ fail:
 	goto out;
 }
 
+asmlinkage void logdev_syscall_trace_enter(struct pt_regs *regs)
+{
+	ltprint("%s:%d calling syscall %ld\n",
+		current->comm, current->pid, regs->orig_rax);
+}
+
 EXPORT_SYMBOL_GPL(logdev_record_switch);
 EXPORT_SYMBOL_GPL(logdev_print);
 EXPORT_SYMBOL_GPL(logdev_print_time);