#include <linux/spinlock.h>
#include <linux/list.h>
+#include <linux/mutex.h>
#include <linux/alarmtimer.h>
#include <linux/timerqueue.h>
* cpu_timer - Posix CPU timer representation for k_itimer
* @node: timerqueue node to queue in the task/sig
* @head: timerqueue head on which this timer is queued
- * @task: Pointer to target task
+ * @pid: Pointer to target task PID
* @elist: List head for the expiry list
* @firing: Timer is currently firing
+ * @handling: Pointer to the task which handles expiry
*/
struct cpu_timer {
- struct timerqueue_node node;
- struct timerqueue_head *head;
- struct pid *pid;
- struct list_head elist;
- int firing;
+ struct timerqueue_node node;
+ struct timerqueue_head *head;
+ struct pid *pid;
+ struct list_head elist;
+ int firing;
+ struct task_struct __rcu *handling;
};
static inline bool cpu_timer_enqueue(struct timerqueue_head *head,
/**
* posix_cputimers_work - Container for task work based posix CPU timer expiry
* @work: The task work to be scheduled
+ * @mutex: Mutex held around expiry in context of this task work
* @scheduled: @work has been scheduled already, no further processing
*/
struct posix_cputimers_work {
struct callback_head work;
+ struct mutex mutex;
unsigned int scheduled;
};