[PATCH RFC 2/2] livepatch: update sample module to use klp relocations

[Josh Poimboeuf]

Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com>
---
 samples/livepatch/livepatch-sample.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/samples/livepatch/livepatch-sample.c 
b/samples/livepatch/livepatch-sample.c
index e34f871..478d102 100644
--- a/samples/livepatch/livepatch-sample.c
+++ b/samples/livepatch/livepatch-sample.c
@@ -32,7 +32,7 @@
  *
  * $ insmod livepatch-sample.ko
  * $ cat /proc/cmdline
- * this has been live patched
+ * <your cmdline> livepatch=1
  *
  * $ echo 0 > /sys/kernel/livepatch/livepatch_sample/enabled
  * $ cat /proc/cmdline
@@ -42,11 +42,18 @@
 #include <linux/seq_file.h>
 static int livepatch_cmdline_proc_show(struct seq_file *m, void *v)
 {
-       seq_printf(m, "%s\n", "this has been live patched");
+       seq_printf(m, "%s livepatch=1\n", saved_command_line);
        return 0;
 }
 
-static struct klp_func funcs[] = {
+struct KLP_MODULE_RELOC(vmlinux) vmlinux_relocs[] = {
+       {
+               .sym = &saved_command_line,
+               .sympos = 0,
+       },
+};
+
+static struct klp_func vmlinux_funcs[] = {
        {
                .old_name = "cmdline_proc_show",
                .new_func = livepatch_cmdline_proc_show,
@@ -56,7 +63,7 @@ static struct klp_func funcs[] = {
 static struct klp_object objs[] = {
        {
                /* name being NULL means vmlinux */
-               .funcs = funcs,
+               .funcs = vmlinux_funcs,
        }, { }
 };
 
-- 
2.7.4