From d707c4062d9d8d1443646ba3681c49b404dd24ad Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Wed, 23 Jul 2014 09:16:11 -0500
Subject: [PATCH] kpatch: add unload --all command

This may end up being useful in the distro patch module upgrade path.
If the core module also needs updating, we can first do "kpatch unload
--all" and "rmmod kpatch" before doing "kpatch load" of the new patch
module.
---
 kpatch/kpatch | 14 ++++++++++++--
 man/kpatch.1  |  3 +++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/kpatch/kpatch b/kpatch/kpatch
index 3785df3..0df5cda 100755
--- a/kpatch/kpatch
+++ b/kpatch/kpatch
@@ -42,6 +42,7 @@ usage () {
 	usage_cmd "load --all" "load all installed patch modules into the running kernel"
 	usage_cmd "load <module>" "load patch module into the running kernel"
 	usage_cmd "replace <module>" "load patch module into the running kernel, replacing all other modules"
+	usage_cmd "unload --all" "unload all patch modules from the running kernel"
 	usage_cmd "unload <module>" "unload patch module from the running kernel"
 	echo >&2
 	usage_cmd "info <module>" "show information about a patch module"
@@ -164,8 +165,17 @@ case "$1" in
 
 "unload")
 	[[ "$#" -ne 2 ]] && usage
-	[[ $2 =~ ^- ]] && usage
-	unload_module "$(basename $2)" || die "failed to unload module $2"
+	case "$2" in
+	"--all")
+		for module in /sys/kernel/kpatch/patches/*; do
+			[[ -e $module ]] || continue
+			unload_module $(basename $module) || die "failed to unload module $module"
+		done
+		;;
+	*)
+		unload_module "$(basename $2)" || die "failed to unload module $2"
+		;;
+	esac
 	;;
 
 "install")
diff --git a/man/kpatch.1 b/man/kpatch.1
index afee613..d8db1b6 100644
--- a/man/kpatch.1
+++ b/man/kpatch.1
@@ -26,6 +26,9 @@ load <module>
 replace <module>
        load patch module into the running kernel, replacing all other modules
 
+unload --all
+       unload all patch modules from the running kernel
+
 unload <module>
        unload patch module from the running kernel