compiler-context-analysis: Remove __assume_ctx_lock from initializers

Remove __assume_ctx_lock() from lock initializers.

Implicitly asserting an active context during initialization caused
false-positive double-lock errors when acquiring a lock immediately after its
initialization. Moving forward, guarded member initialization must either:

	1. Use guard(type_init)(&lock) or scoped_guard(type_init, ...).
	2. Use context_unsafe() for simple initialization.

Reported-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/57062131-e79e-42c2-aa0b-8f931cb8cac2@acm.org/
Link: https://patch.msgid.link/20260119094029.1344361-7-elver@google.com

Author: melver

include/linux/local_lock_internal.h

@@ -87,13 +87,11 @@ do {								\
 			      0, LD_WAIT_CONFIG, LD_WAIT_INV,	\
 			      LD_LOCK_PERCPU);			\
 	local_lock_debug_init(lock);				\
-	__assume_ctx_lock(lock);				\
 } while (0)
 
 #define __local_trylock_init(lock)				\
 do {								\
 	__local_lock_init((local_lock_t *)lock);		\
-	__assume_ctx_lock(lock);				\
 } while (0)
 
 #define __spinlock_nested_bh_init(lock)				\
@@ -105,7 +103,6 @@ do {								\
 			      0, LD_WAIT_CONFIG, LD_WAIT_INV,	\
 			      LD_LOCK_NORMAL);			\
 	local_lock_debug_init(lock);				\
-	__assume_ctx_lock(lock);				\
 } while (0)
 
 #define __local_lock_acquire(lock)					\

include/linux/mutex.h

@@ -62,7 +62,6 @@ do {									\
 	static struct lock_class_key __key;				\
 									\
 	__mutex_init((mutex), #mutex, &__key);				\
-	__assume_ctx_lock(mutex);					\
 } while (0)
 
 /**

include/linux/rwlock.h

@@ -22,11 +22,10 @@ do {								\
 	static struct lock_class_key __key;			\
 								\
 	__rwlock_init((lock), #lock, &__key);			\
-	__assume_ctx_lock(lock);				\
 } while (0)
 #else
 # define rwlock_init(lock)					\
-	do { *(lock) = __RW_LOCK_UNLOCKED(lock); __assume_ctx_lock(lock); } while (0)
+	do { *(lock) = __RW_LOCK_UNLOCKED(lock); } while (0)
 #endif
 
 #ifdef CONFIG_DEBUG_SPINLOCK

include/linux/rwlock_rt.h

@@ -22,7 +22,6 @@ do {							\
 							\
 	init_rwbase_rt(&(rwl)->rwbase);			\
 	__rt_rwlock_init(rwl, #rwl, &__key);		\
-	__assume_ctx_lock(rwl);				\
 } while (0)
 
 extern void rt_read_lock(rwlock_t *rwlock)	__acquires_shared(rwlock);

include/linux/rwsem.h

@@ -121,7 +121,6 @@ do {								\
 	static struct lock_class_key __key;			\
 								\
 	__init_rwsem((sem), #sem, &__key);			\
-	__assume_ctx_lock(sem);					\
 } while (0)
 
 /*
@@ -175,7 +174,6 @@ do {								\
 	static struct lock_class_key __key;			\
 								\
 	__init_rwsem((sem), #sem, &__key);			\
-	__assume_ctx_lock(sem);					\
 } while (0)
 
 static __always_inline int rwsem_is_locked(const struct rw_semaphore *sem)

include/linux/seqlock.h

@@ -817,7 +817,6 @@ static __always_inline void write_seqcount_latch_end(seqcount_latch_t *s)
 	do {								\
 		spin_lock_init(&(sl)->lock);				\
 		seqcount_spinlock_init(&(sl)->seqcount, &(sl)->lock);	\
-		__assume_ctx_lock(sl);					\
 	} while (0)
 
 /**

include/linux/spinlock.h

@@ -106,12 +106,11 @@ do {									\
 	static struct lock_class_key __key;				\
 									\
 	__raw_spin_lock_init((lock), #lock, &__key, LD_WAIT_SPIN);	\
-	__assume_ctx_lock(lock);					\
 } while (0)
 
 #else
 # define raw_spin_lock_init(lock)				\
-	do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); __assume_ctx_lock(lock); } while (0)
+	do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); } while (0)
 #endif
 
 #define raw_spin_is_locked(lock)	arch_spin_is_locked(&(lock)->raw_lock)
@@ -324,7 +323,6 @@ do {								\
 								\
 	__raw_spin_lock_init(spinlock_check(lock),		\
 			     #lock, &__key, LD_WAIT_CONFIG);	\
-	__assume_ctx_lock(lock);				\
 } while (0)
 
 #else
@@ -333,7 +331,6 @@ do {								\
 do {						\
 	spinlock_check(_lock);			\
 	*(_lock) = __SPIN_LOCK_UNLOCKED(_lock);	\
-	__assume_ctx_lock(_lock);		\
 } while (0)
 
 #endif

include/linux/spinlock_rt.h

@@ -20,7 +20,6 @@ static inline void __rt_spin_lock_init(spinlock_t *lock, const char *name,
 do {								\
 	rt_mutex_base_init(&(slock)->lock);			\
 	__rt_spin_lock_init(slock, name, key, percpu);		\
-	__assume_ctx_lock(slock);				\
 } while (0)
 
 #define _spin_lock_init(slock, percpu)				\

include/linux/ww_mutex.h

@@ -107,7 +107,6 @@ context_lock_struct(ww_acquire_ctx) {
  */
 static inline void ww_mutex_init(struct ww_mutex *lock,
 				 struct ww_class *ww_class)
-	__assumes_ctx_lock(lock)
 {
 	ww_mutex_base_init(&lock->base, ww_class->mutex_name, &ww_class->mutex_key);
 	lock->ctx = NULL;

lib/test_context-analysis.c

@@ -542,12 +542,6 @@ struct test_ww_mutex_data {
 	int counter __guarded_by(&mtx);
 };
 
-static void __used test_ww_mutex_init(struct test_ww_mutex_data *d)
-{
-	ww_mutex_init(&d->mtx, &ww_class);
-	d->counter = 0;
-}
-
 static void __used test_ww_mutex_lock_noctx(struct test_ww_mutex_data *d)
 {
 	if (!ww_mutex_lock(&d->mtx, NULL)) {