rcu: Clean up flavor-related definitions and comments in rcu.h (7f87c036) · Commits · 戴 / test

kernel/rcu/rcu.h

+10 −8

Original line number	Diff line number	Diff line
		@@ -176,8 +176,9 @@ static inline unsigned long rcu_seq_diff(unsigned long new, unsigned long old)

		/*
		* debug_rcu_head_queue()/debug_rcu_head_unqueue() are used internally
		* by call_rcu() and rcu callback execution, and are therefore not part of the
		* RCU API. Leaving in rcupdate.h because they are used by all RCU flavors.
		* by call_rcu() and rcu callback execution, and are therefore not part
		* of the RCU API. These are in rcupdate.h because they are used by all
		* RCU implementations.
		*/

		#ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD
		@@ -328,7 +329,7 @@ static inline void rcu_init_levelspread(int levelspread, const int levelcnt)
		}
		}

		/* Returns first leaf rcu_node of the specified RCU flavor. */
		/* Returns a pointer to the first leaf rcu_node structure. */
		#define rcu_first_leaf_node() (rcu_state.level[rcu_num_lvls - 1])

		/* Is this rcu_node a leaf? */
		@@ -339,7 +340,8 @@ static inline void rcu_init_levelspread(int levelspread, const int levelcnt)

		/*
		* Do a full breadth-first scan of the {s,}rcu_node structures for the
		* specified rcu_state structure.
		* specified state structure (for SRCU) or the only rcu_state structure
		* (for RCU).
		*/
		#define srcu_for_each_node_breadth_first(sp, rnp) \
		for ((rnp) = &(sp)->node[0]; \
		@@ -348,10 +350,10 @@ static inline void rcu_init_levelspread(int levelspread, const int levelcnt)
		srcu_for_each_node_breadth_first(&rcu_state, rnp)

		/*
		* Scan the leaves of the rcu_node hierarchy for the specified rcu_state
		* structure. Note that if there is a singleton rcu_node tree with but
		* one rcu_node structure, this loop -will- visit the rcu_node structure.
		* It is still a leaf node, even if it is also the root node.
		* Scan the leaves of the rcu_node hierarchy for the rcu_state structure.
		* Note that if there is a singleton rcu_node tree with but one rcu_node
		* structure, this loop -will- visit the rcu_node structure. It is still
		* a leaf node, even if it is also the root node.
		*/
		#define rcu_for_each_leaf_node(rnp) \
		for ((rnp) = rcu_first_leaf_node(); \

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