summaryrefslogtreecommitdiffstats
path: root/lib/livepatch/test_klp_callbacks_busy.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/livepatch/test_klp_callbacks_busy.c')
-rw-r--r--lib/livepatch/test_klp_callbacks_busy.c70
1 files changed, 0 insertions, 70 deletions
diff --git a/lib/livepatch/test_klp_callbacks_busy.c b/lib/livepatch/test_klp_callbacks_busy.c
deleted file mode 100644
index 133929e0ce..0000000000
--- a/lib/livepatch/test_klp_callbacks_busy.c
+++ /dev/null
@@ -1,70 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com>
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/workqueue.h>
-#include <linux/delay.h>
-
-/* load/run-time control from sysfs writer */
-static bool block_transition;
-module_param(block_transition, bool, 0644);
-MODULE_PARM_DESC(block_transition, "block_transition (default=false)");
-
-static void busymod_work_func(struct work_struct *work);
-static DECLARE_WORK(work, busymod_work_func);
-static DECLARE_COMPLETION(busymod_work_started);
-
-static void busymod_work_func(struct work_struct *work)
-{
- pr_info("%s enter\n", __func__);
- complete(&busymod_work_started);
-
- while (READ_ONCE(block_transition)) {
- /*
- * Busy-wait until the sysfs writer has acknowledged a
- * blocked transition and clears the flag.
- */
- msleep(20);
- }
-
- pr_info("%s exit\n", __func__);
-}
-
-static int test_klp_callbacks_busy_init(void)
-{
- pr_info("%s\n", __func__);
- schedule_work(&work);
-
- /*
- * To synchronize kernel messages, hold the init function from
- * exiting until the work function's entry message has printed.
- */
- wait_for_completion(&busymod_work_started);
-
- if (!block_transition) {
- /*
- * Serialize output: print all messages from the work
- * function before returning from init().
- */
- flush_work(&work);
- }
-
- return 0;
-}
-
-static void test_klp_callbacks_busy_exit(void)
-{
- WRITE_ONCE(block_transition, false);
- flush_work(&work);
- pr_info("%s\n", __func__);
-}
-
-module_init(test_klp_callbacks_busy_init);
-module_exit(test_klp_callbacks_busy_exit);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Joe Lawrence <joe.lawrence@redhat.com>");
-MODULE_DESCRIPTION("Livepatch test: busy target module");