From 7f9807ce45c8260880d8887029ad2df427dfd5ff Mon Sep 17 00:00:00 2001
From: Ciro Santilli <ciro.santilli@gmail.com>
Date: Mon, 5 Jun 2017 15:03:25 +0100
Subject: [PATCH] Multiple kernel params, busybox modinfo

---
 busybox_config_fragment |  1 +
 kernel_module/params.c  | 21 +++++++++++++++------
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/busybox_config_fragment b/busybox_config_fragment
index d91c5a8..9a827c9 100644
--- a/busybox_config_fragment
+++ b/busybox_config_fragment
@@ -1,3 +1,4 @@
+CONFIG_MODINFO=y
 CONFIG_NC=y
 CONFIG_NC_EXTRA=y
 CONFIG_NC_SERVER=y
diff --git a/kernel_module/params.c b/kernel_module/params.c
index 90913cf..7738c80 100644
--- a/kernel_module/params.c
+++ b/kernel_module/params.c
@@ -4,15 +4,21 @@ Allows passing parameters at insertion time.
 Those parameters can also be read and modified at runtime from /sys.
 
 	insmod /params.ko
-	# dmesg => 0
+	# dmesg => 0 0
 	cd /sys/module/params/parameters
 	cat i
-	# => 0
+	# => 1 0
 	printf 1 >i
-	# dmesg => 1
+	# dmesg => 1 0
 	rmmod params
-	insmod /params.ko i=1
-	# dmesg => 1
+
+	insmod /params.ko i=1 j=1
+	# dmesg => 1 1
+	rmmod params
+
+	modinfo
+	/params.ko
+	# Output contains MODULE_PARAM_DESC descriptions.
 */
 
 #include <linux/delay.h> /* usleep_range */
@@ -24,15 +30,18 @@ Those parameters can also be read and modified at runtime from /sys.
 MODULE_LICENSE("GPL");
 
 static int i = 0;
+static int j = 0;
 module_param(i, int, S_IRUSR | S_IWUSR);
+module_param(j, int, S_IRUSR | S_IWUSR);
 MODULE_PARM_DESC(i, "my favorite int");
+MODULE_PARM_DESC(j, "my second favorite int");
 
 static struct task_struct *kthread;
 
 static int work_func(void *data)
 {
 	while (!kthread_should_stop()) {
-		pr_info("%d\n", i);
+		pr_info("%d %d\n", i, j);
 		usleep_range(1000000, 1000001);
 	}
 	return 0;