Merge tag 'locking_urgent_for_v6.13_rc3' of git://git.kernel.org/pub/…

…scm/linux/kernel/git/tip/tip

Pull locking fixes from Borislav Petkov:

 - Remove if_not_guard() as it is generating incorrect code

 - Fix the initialization of the fake lockdep_map for the first locked
   ww_mutex

* tag 'locking_urgent_for_v6.13_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  headers/cleanup.h: Remove the if_not_guard() facility
  locking/ww_mutex: Fix ww_mutex dummy lockdep map selftest warnings

include/linux/cleanup.h

@@ -273,12 +273,6 @@ static inline class_##_name##_t class_##_name##ext##_constructor(_init_args) \
  *	an anonymous instance of the (guard) class, not recommended for
  *	conditional locks.
  *
- * if_not_guard(name, args...) { <error handling> }:
- *	convenience macro for conditional guards that calls the statement that
- *	follows only if the lock was not acquired (typically an error return).
- *
- *	Only for conditional locks.
- *
  * scoped_guard (name, args...) { }:
  *	similar to CLASS(name, scope)(args), except the variable (with the
  *	explicit name 'scope') is declard in a for-loop such that its scope is
@@ -350,14 +344,6 @@ _label:									\
 #define scoped_cond_guard(_name, _fail, args...)	\
 	__scoped_cond_guard(_name, _fail, __UNIQUE_ID(label), args)
 
-#define __if_not_guard(_name, _id, args...)		\
-	BUILD_BUG_ON(!__is_cond_ptr(_name));		\
-	CLASS(_name, _id)(args);			\
-	if (!__guard_ptr(_name)(&_id))
-
-#define if_not_guard(_name, args...) \
-	__if_not_guard(_name, __UNIQUE_ID(guard), args)
-
 /*
  * Additional helper macros for generating lock guards with types, either for
  * locks that don't have a native type (eg. RCU, preempt) or those that need a

include/linux/ww_mutex.h

@@ -156,8 +156,8 @@ static inline void ww_acquire_init(struct ww_acquire_ctx *ctx,
 	debug_check_no_locks_freed((void *)ctx, sizeof(*ctx));
 	lockdep_init_map(&ctx->dep_map, ww_class->acquire_name,
 			 &ww_class->acquire_key, 0);
-	lockdep_init_map(&ctx->first_lock_dep_map, ww_class->mutex_name,
-			 &ww_class->mutex_key, 0);
+	lockdep_init_map_wait(&ctx->first_lock_dep_map, ww_class->mutex_name,
+			      &ww_class->mutex_key, 0, LD_WAIT_SLEEP);
 	mutex_acquire(&ctx->dep_map, 0, 0, _RET_IP_);
 	mutex_acquire_nest(&ctx->first_lock_dep_map, 0, 0, &ctx->dep_map, _RET_IP_);
 #endif

lib/locking-selftest.c

@@ -1720,8 +1720,6 @@ static void ww_test_normal(void)
 {
 	int ret;
 
-	WWAI(&t);
-
 	/*
 	 * None of the ww_mutex codepaths should be taken in the 'normal'
 	 * mutex calls. The easiest way to verify this is by using the
@@ -1770,6 +1768,8 @@ static void ww_test_normal(void)
 	ww_mutex_base_unlock(&o.base);
 	WARN_ON(o.ctx != (void *)~0UL);
 
+	WWAI(&t);
+
 	/* nest_lock */
 	o.ctx = (void *)~0UL;
 	ww_mutex_base_lock_nest_lock(&o.base, &t);