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Livepatching changes for 5.20

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Merge tag 'livepatching-for-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching

Pull livepatching update from Petr Mladek:

 - Make a selftest more reliable

* tag 'livepatching-for-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
  selftests/livepatch: better synchronize test_klp_callbacks_busy
This commit is contained in:
Linus Torvalds 2022-08-06 09:19:42 -07:00
commit 033a94412b
1 changed files with 8 additions and 0 deletions
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8
lib/livepatch/test_klp_callbacks_busy.c
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@ -16,10 +16,12 @@ MODULE_PARM_DESC(block_transition, "block_transition (default=false)");
static void busymod_work_func(struct work_struct *work); static void busymod_work_func(struct work_struct *work);
static DECLARE_WORK(work, busymod_work_func); static DECLARE_WORK(work, busymod_work_func);
static DECLARE_COMPLETION(busymod_work_started);
static void busymod_work_func(struct work_struct *work) static void busymod_work_func(struct work_struct *work)
{ {
pr_info("%s enter\n", __func__); pr_info("%s enter\n", __func__);
complete(&busymod_work_started);
while (READ_ONCE(block_transition)) { while (READ_ONCE(block_transition)) {
/* /*
@ -37,6 +39,12 @@ static int test_klp_callbacks_busy_init(void)
pr_info("%s\n", __func__); pr_info("%s\n", __func__);
schedule_work(&work); 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) { if (!block_transition) {
/* /*
* Serialize output: print all messages from the work * Serialize output: print all messages from the work