change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/include/linux/rcupdate.h
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@@ -54,11 +54,6 @@
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  * types of kernel builds, the rcu_read_lock() nesting depth is unknowable.
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  */
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 #define rcu_preempt_depth() (current->rcu_read_lock_nesting)
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-#ifndef CONFIG_PREEMPT_RT
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-#define sched_rcu_preempt_depth()	rcu_preempt_depth()
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-#else
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-static inline int sched_rcu_preempt_depth(void) { return 0; }
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-#endif
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 #else /* #ifdef CONFIG_PREEMPT_RCU */
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@@ -84,13 +79,11 @@
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 	return 0;
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 }
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-#define sched_rcu_preempt_depth()	rcu_preempt_depth()
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-
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 #endif /* #else #ifdef CONFIG_PREEMPT_RCU */
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 /* Internal to kernel */
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 void rcu_init(void);
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-extern int rcu_scheduler_active __read_mostly;
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+extern int rcu_scheduler_active;
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 void rcu_sched_clock_irq(int user);
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 void rcu_report_dead(unsigned int cpu);
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 void rcutree_migrate_callbacks(int cpu);
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@@ -196,6 +189,7 @@
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 #define rcu_note_voluntary_context_switch(t) rcu_tasks_qs(t, false)
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 void exit_tasks_rcu_start(void);
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+void exit_tasks_rcu_stop(void);
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 void exit_tasks_rcu_finish(void);
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 #else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
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 #define rcu_tasks_qs(t, preempt) do { } while (0)
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@@ -203,6 +197,7 @@
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 #define call_rcu_tasks call_rcu
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 #define synchronize_rcu_tasks synchronize_rcu
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 static inline void exit_tasks_rcu_start(void) { }
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+static inline void exit_tasks_rcu_stop(void) { }
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 static inline void exit_tasks_rcu_finish(void) { }
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 #endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */
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@@ -313,11 +308,18 @@
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  * RCU_LOCKDEP_WARN - emit lockdep splat if specified condition is met
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  * @c: condition to check
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  * @s: informative message
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+ *
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+ * This checks debug_lockdep_rcu_enabled() before checking (c) to
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+ * prevent early boot splats due to lockdep not yet being initialized,
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+ * and rechecks it after checking (c) to prevent false-positive splats
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+ * due to races with lockdep being disabled.  See commit 3066820034b5dd
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+ * ("rcu: Reject RCU_LOCKDEP_WARN() false positives") for more detail.
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  */
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 #define RCU_LOCKDEP_WARN(c, s)						\
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 	do {								\
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 		static bool __section(".data.unlikely") __warned;	\
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-		if ((c) && debug_lockdep_rcu_enabled() && !__warned) {	\
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+		if (debug_lockdep_rcu_enabled() && (c) &&		\
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+		    debug_lockdep_rcu_enabled() && !__warned) {		\
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 			__warned = true;				\
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 			lockdep_rcu_suspicious(__FILE__, __LINE__, s);	\
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 		}							\
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@@ -336,8 +338,7 @@
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 #define rcu_sleep_check()						\
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 	do {								\
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 		rcu_preempt_sleep_check();				\
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-		if (!IS_ENABLED(CONFIG_PREEMPT_RT))			\
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-		    RCU_LOCKDEP_WARN(lock_is_held(&rcu_bh_lock_map),	\
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+		RCU_LOCKDEP_WARN(lock_is_held(&rcu_bh_lock_map),	\
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 				 "Illegal context switch in RCU-bh read-side critical section"); \
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 		RCU_LOCKDEP_WARN(lock_is_held(&rcu_sched_lock_map),	\
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 				 "Illegal context switch in RCU-sched read-side critical section"); \