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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/linux/spinlock_rt.h
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 #ifndef __LINUX_SPINLOCK_RT_H
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 #define __LINUX_SPINLOCK_RT_H
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@@ -19,10 +20,10 @@
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 } while (0)
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 extern void __lockfunc rt_spin_lock(spinlock_t *lock);
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-extern unsigned long __lockfunc rt_spin_lock_trace_flags(spinlock_t *lock);
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 extern void __lockfunc rt_spin_lock_nested(spinlock_t *lock, int subclass);
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+extern void __lockfunc rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock);
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 extern void __lockfunc rt_spin_unlock(spinlock_t *lock);
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-extern void __lockfunc rt_spin_unlock_wait(spinlock_t *lock);
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+extern void __lockfunc rt_spin_lock_unlock(spinlock_t *lock);
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 extern int __lockfunc rt_spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags);
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 extern int __lockfunc rt_spin_trylock_bh(spinlock_t *lock);
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 extern int __lockfunc rt_spin_trylock(spinlock_t *lock);
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@@ -68,6 +69,12 @@
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 		rt_spin_lock_nested(lock, subclass);	\
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 	} while (0)
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+# define spin_lock_nest_lock(lock, subclass)		\
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+	do {                                                           \
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+		typecheck(struct lockdep_map *, &(subclass)->dep_map);	\
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+		rt_spin_lock_nest_lock(lock, &(subclass)->dep_map);	\
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+	} while (0)
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+
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 # define spin_lock_irqsave_nested(lock, flags, subclass) \
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 	do {						 \
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 		typecheck(unsigned long, flags);	 \
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@@ -75,14 +82,15 @@
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 		rt_spin_lock_nested(lock, subclass);	 \
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 	} while (0)
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 #else
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-# define spin_lock_nested(lock, subclass)	spin_lock(lock)
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-# define spin_lock_bh_nested(lock, subclass)	spin_lock_bh(lock)
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+# define spin_lock_nested(lock, subclass)	spin_lock(((void)(subclass), (lock)))
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+# define spin_lock_nest_lock(lock, subclass)	spin_lock(((void)(subclass), (lock)))
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+# define spin_lock_bh_nested(lock, subclass)	spin_lock_bh(((void)(subclass), (lock)))
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 # define spin_lock_irqsave_nested(lock, flags, subclass) \
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 	do {						 \
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 		typecheck(unsigned long, flags);	 \
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 		flags = 0;				 \
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-		spin_lock(lock);			 \
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+		spin_lock(((void)(subclass), (lock)));	 \
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 	} while (0)
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 #endif
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@@ -92,20 +100,6 @@
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 		flags = 0;				 \
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 		spin_lock(lock);			 \
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 	} while (0)
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-
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-static inline unsigned long spin_lock_trace_flags(spinlock_t *lock)
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-{
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-	unsigned long flags = 0;
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-#ifdef CONFIG_TRACE_IRQFLAGS
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-	flags = rt_spin_lock_trace_flags(lock);
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-#else
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-	spin_lock(lock); /* lock_local */
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-#endif
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-	return flags;
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-}
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-
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-/* FIXME: we need rt_spin_lock_nest_lock */
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-#define spin_lock_nest_lock(lock, nest_lock) spin_lock_nested(lock, 0)
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 #define spin_unlock(lock)			rt_spin_unlock(lock)
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@@ -127,10 +121,15 @@
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 #define spin_trylock_bh(lock)	__cond_lock(lock, rt_spin_trylock_bh(lock))
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 #define spin_trylock_irq(lock)	spin_trylock(lock)
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-#define spin_trylock_irqsave(lock, flags)	\
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-	rt_spin_trylock_irqsave(lock, &(flags))
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-
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-#define spin_unlock_wait(lock)		rt_spin_unlock_wait(lock)
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+#define spin_trylock_irqsave(lock, flags)		\
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+({							\
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+	int __locked;					\
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+							\
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+	typecheck(unsigned long, flags);		\
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+	flags = 0;					\
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+	__locked = spin_trylock(lock);			\
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+	__locked;					\
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+})
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 #ifdef CONFIG_GENERIC_LOCKBREAK
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 # define spin_is_contended(lock)	((lock)->break_lock)