This patch adds something like the following code:

   6:	48 c7 c2 00 00 00 00 	mov    $0x0,%rdx
   d:	48 c7 c6 00 00 00 00 	mov    $0x0,%rsi
			10: R_X86_64_32S	.rodata.str1.1+0x3c
  14:	31 c0                	xor    %eax,%eax
  16:	48 89 e5             	mov    %rsp,%rbp
  19:	53                   	push   %rbx
  1a:	48 89 fb             	mov    %rdi,%rbx
  1d:	e8 00 00 00 00       	callq  22 <cmdline_proc_show+0x22>
			1e: R_X86_64_PC32	seq_printf-0x4

where we're interested in how the R_X86_64_32S relocation for the
function pointer gets resolved.  Issue #755, "kpatch-build, x86: do not
use the patched functions as callbacks directly," modified
create-diff-object so that the addresses of the original functions were
used instead of patched equivalents.

--- a/fs/proc/cmdline.c	2018-01-12 10:41:01.207537265 -0500
+++ b/fs/proc/cmdline.c	2018-01-12 10:41:59.156981302 -0500
@@ -5,6 +5,11 @@
 
 static int cmdline_proc_show(struct seq_file *m, void *v)
 {
+	int (*fp)(struct seq_file *, void *);
+
+	fp = &cmdline_proc_show;
+	seq_printf(m, "kpatch: cmdline_proc_show = %p\n", fp);
+
 	seq_printf(m, "%s\n", saved_command_line);
 	return 0;
 }