add can driver

hc

2023-12-02 57e32c52610e6a560beda60bf33c48f9f42306d5

 kernel/include/linux/hrtimer.h
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@@ -42,6 +42,7 @@
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 	HRTIMER_MODE_REL	= 0x01,
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 	HRTIMER_MODE_PINNED	= 0x02,
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 	HRTIMER_MODE_SOFT	= 0x04,
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+	HRTIMER_MODE_HARD	= 0x08,
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 	HRTIMER_MODE_ABS_PINNED = HRTIMER_MODE_ABS | HRTIMER_MODE_PINNED,
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 	HRTIMER_MODE_REL_PINNED = HRTIMER_MODE_REL | HRTIMER_MODE_PINNED,
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@@ -52,6 +53,11 @@
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 	HRTIMER_MODE_ABS_PINNED_SOFT = HRTIMER_MODE_ABS_PINNED | HRTIMER_MODE_SOFT,
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 	HRTIMER_MODE_REL_PINNED_SOFT = HRTIMER_MODE_REL_PINNED | HRTIMER_MODE_SOFT,
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+	HRTIMER_MODE_ABS_HARD	= HRTIMER_MODE_ABS | HRTIMER_MODE_HARD,
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+	HRTIMER_MODE_REL_HARD	= HRTIMER_MODE_REL | HRTIMER_MODE_HARD,
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+
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+	HRTIMER_MODE_ABS_PINNED_HARD = HRTIMER_MODE_ABS_PINNED | HRTIMER_MODE_HARD,
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+	HRTIMER_MODE_REL_PINNED_HARD = HRTIMER_MODE_REL_PINNED | HRTIMER_MODE_HARD,
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 };
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 /*
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@@ -189,6 +195,8 @@
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  * @nr_retries:		Total number of hrtimer interrupt retries
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  * @nr_hangs:		Total number of hrtimer interrupt hangs
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  * @max_hang_time:	Maximum time spent in hrtimer_interrupt
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+ * @softirq_expiry_lock: Lock which is taken while softirq based hrtimer are
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+ *			 expired
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  * @expires_next:	absolute time of the next event, is required for remote
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  *			hrtimer enqueue; it is the total first expiry time (hard
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  *			and soft hrtimer are taken into account)
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@@ -216,6 +224,7 @@
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 	unsigned short			nr_hangs;
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 	unsigned int			max_hang_time;
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 #endif
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+	spinlock_t			softirq_expiry_lock;
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 	ktime_t				expires_next;
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 	struct hrtimer			*next_timer;
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 	ktime_t				softirq_expires_next;
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@@ -353,10 +362,17 @@
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 /* Initialize timers: */
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 extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock,
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 			 enum hrtimer_mode mode);
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+extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, clockid_t clock_id,
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+				 enum hrtimer_mode mode,
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+				 struct task_struct *task);
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 #ifdef CONFIG_DEBUG_OBJECTS_TIMERS
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 extern void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t which_clock,
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 				  enum hrtimer_mode mode);
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+extern void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
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+					  clockid_t clock_id,
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+					  enum hrtimer_mode mode,
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+					  struct task_struct *task);
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 extern void destroy_hrtimer_on_stack(struct hrtimer *timer);
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 #else
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@@ -366,6 +382,15 @@
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 {
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 	hrtimer_init(timer, which_clock, mode);
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 }
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+
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+static inline void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
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+					    clockid_t clock_id,
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+					    enum hrtimer_mode mode,
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+					    struct task_struct *task)
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+{
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+	hrtimer_init_sleeper(sl, clock_id, mode, task);
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+}
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+
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 static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { }
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 #endif
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@@ -389,6 +414,7 @@
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 extern int hrtimer_cancel(struct hrtimer *timer);
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 extern int hrtimer_try_to_cancel(struct hrtimer *timer);
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+extern void hrtimer_grab_expiry_lock(const struct hrtimer *timer);
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 static inline void hrtimer_start_expires(struct hrtimer *timer,
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 					 enum hrtimer_mode mode)
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@@ -474,9 +500,6 @@
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 extern long hrtimer_nanosleep(const struct timespec64 *rqtp,
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 			      const enum hrtimer_mode mode,
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 			      const clockid_t clockid);
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-
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-extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl,
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-				 struct task_struct *tsk);
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 extern int schedule_hrtimeout_range(ktime_t *expires, u64 delta,
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 						const enum hrtimer_mode mode);