Merge branch 'uprobes-v7' of git://git.linaro.org/people/dave.long/linux into devel-stable

This patch series adds basic uprobes support to ARM. It is based on
patches developed earlier by Rabin Vincent. That approach of adding
hooks into the kprobes instruction parsing code was not well received.
This approach separates the ARM instruction parsing code in kprobes out
into a separate set of functions which can be used by both kprobes and
uprobes. Both kprobes and uprobes then provide their own semantic action
tables to process the results of the parsing.

1 files changed, 7 insertions, 0 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 82ef9f3b7473..193e977a10ea 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1851,6 +1851,12 @@ static void destroy_worker(struct worker *worker)
         if (worker->flags & WORKER_IDLE)
                 pool->nr_idle--;
 
+        /*
+         * Once WORKER_DIE is set, the kworker may destroy itself at any
+         * point.  Pin to ensure the task stays until we're done with it.
+         */
+        get_task_struct(worker->task);
+
         list_del_init(&worker->entry);
         worker->flags |= WORKER_DIE;
 
@@ -1859,6 +1865,7 @@ static void destroy_worker(struct worker *worker)
         spin_unlock_irq(&pool->lock);
 
         kthread_stop(worker->task);
+        put_task_struct(worker->task);
         kfree(worker);
 
         spin_lock_irq(&pool->lock);