core/linuxlist.h: fix and unify Doxygen documentation

  - drop incorrect \ref and \a references;
  - add missing documentation to LLIST_HEAD_INIT;
  - document parameter 'member' of llist_entry();
  - turn @argument naming into a valid \param format;
  - fix 'type *' vs llist_head loop counter confusion;
  - capitalize and dot-terminate all sentences.

Change-Id: Iac67bdb9d5fbf7c222d04858967337f2428d6a94

1 files changed, 96 insertions, 99 deletions

diff --git a/include/osmocom/core/linuxlist.h b/include/osmocom/core/linuxlist.h
index 77913104..d040d903 100644
--- a/include/osmocom/core/linuxlist.h
+++ b/include/osmocom/core/linuxlist.h
@@ -23,11 +23,10 @@
 
 static inline void prefetch(const void *x) {;}
 
-/*! cast a member of a structure out to the containing structure
- *
- * \param[in] ptr the pointer to the member.
- * \param[in] type the type of the container struct this is embedded in.
- * \param[in] member the name of the member within the struct.
+/*! Cast a member of a structure out to the containing structure.
+ *  \param[in] ptr    the pointer to the member.
+ *  \param[in] type   the type of the container struct this is embedded in.
+ *  \param[in] member the name of the member within the struct.
  */
 #define container_of(ptr, type, member) ({			\
         const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
@@ -48,22 +47,26 @@ struct llist_head {
 	struct llist_head *next, *prev;
 };
 
+/*! Define a new llist_head pointing to a given llist_head.
+ *  \param[in] name another llist_head to be pointed.
+ */
 #define LLIST_HEAD_INIT(name) { &(name), &(name) }
 
-/*! define a statically-initialized \ref llist_head
- *  \param[in] name Variable name
- *
- * This is a helper macro that will define a named variable of type
- * \ref llist_head and initialize it */
+/*! Define a statically-initialized variable of type llist_head.
+ *  \param[in] name variable (symbol) name.
+ */
 #define LLIST_HEAD(name) \
 	struct llist_head name = LLIST_HEAD_INIT(name)
 
-/*! initialize a \ref llist_head to point back to self */
+/*! Initialize a llist_head to point back to itself.
+ *  \param[in] ptr llist_head to be initialized.
+ */
 #define INIT_LLIST_HEAD(ptr) do { \
 	(ptr)->next = (ptr); (ptr)->prev = (ptr); \
 } while (0)
 
-/*! Insert a new entry between two known consecutive entries. 
+/*
+ * Insert a new entry between two known consecutive entries.
  *
  * This is only for internal llist manipulation where we know
  * the prev/next entries already!
@@ -78,9 +81,9 @@ static inline void __llist_add(struct llist_head *_new,
 	prev->next = _new;
 }
 
-/*! add a new entry into a linked list (at head)
- *  \param _new New entry to be added
- *  \param head \ref llist_head to add it after
+/*! Add a new entry into a linked list (at head).
+ *  \param _new the entry to be added.
+ *  \param head llist_head to prepend the element to.
  *
  * Insert a new entry after the specified head.
  * This is good for implementing stacks.
@@ -90,9 +93,9 @@ static inline void llist_add(struct llist_head *_new, struct llist_head *head)
 	__llist_add(_new, head, head->next);
 }
 
-/*! add a new entry into a linked list (at tail)
- *  \param _new  New entry to be added
- *  \param head  Head of linked list to whose tail we shall add \a _new
+/*! Add a new entry into a linked list (at tail).
+ *  \param _new the entry to be added.
+ *  \param head llist_head to append the element to.
  *
  * Insert a new entry before the specified head.
  * This is useful for implementing queues.
@@ -115,8 +118,8 @@ static inline void __llist_del(struct llist_head * prev, struct llist_head * nex
 	prev->next = next;
 }
 
-/*! Delete entry from linked list
- *  \param entry  The element to delete from the llist
+/*! Delete a single entry from a linked list.
+ *  \param entry the element to delete.
  *
  * Note: llist_empty on entry does not return true after this, the entry is
  * in an undefined state.
@@ -128,8 +131,8 @@ static inline void llist_del(struct llist_head *entry)
 	entry->prev = (struct llist_head *)LLIST_POISON2;
 }
 
-/*! Delete entry from linked list and reinitialize it
- *  \param entry  The element to delete from the list
+/*! Delete a single entry from a linked list and reinitialize it.
+ *  \param entry the element to delete and reinitialize.
  */
 static inline void llist_del_init(struct llist_head *entry)
 {
@@ -137,9 +140,9 @@ static inline void llist_del_init(struct llist_head *entry)
 	INIT_LLIST_HEAD(entry); 
 }
 
-/*! Delete from one llist and add as another's head
- *  \param llist The entry to move
- *  \param head	The head that will precede our entry
+/*! Delete from one llist and add as another's head.
+ *  \param llist the entry to move.
+ *  \param head  the head that will precede our entry.
  */
 static inline void llist_move(struct llist_head *llist, struct llist_head *head)
 {
@@ -147,9 +150,9 @@ static inline void llist_move(struct llist_head *llist, struct llist_head *head)
         llist_add(llist, head);
 }
 
-/*! Delete from one llist and add as another's tail
- *  \param llist The entry to move
- *  \param head The head that will follow our entry
+/*! Delete from one llist and add as another's tail.
+ *  \param llist the entry to move.
+ *  \param head  the head that will follow our entry.
  */
 static inline void llist_move_tail(struct llist_head *llist,
 				  struct llist_head *head)
@@ -158,9 +161,9 @@ static inline void llist_move_tail(struct llist_head *llist,
         llist_add_tail(llist, head);
 }
 
-/*! Test whether a linked list is empty
- *  \param[in] head  The llist to test.
- *  \returns 1 if the list is empty, 0 otherwise
+/*! Test whether a linked list is empty.
+ *  \param[in] head the llist to test.
+ *  \returns 1 if the list is empty, 0 otherwise.
  */
 static inline int llist_empty(const struct llist_head *head)
 {
@@ -181,9 +184,9 @@ static inline void __llist_splice(struct llist_head *llist,
 	at->prev = last;
 }
 
-/*! Join two llists
- *  \param llist The new linked list to add
- *  \param head The place to add \a llist in the other list
+/*! Join two linked lists.
+ *  \param llist the new linked list to add.
+ *  \param head  the place to add llist within the other list.
  */
 static inline void llist_splice(struct llist_head *llist, struct llist_head *head)
 {
@@ -191,11 +194,11 @@ static inline void llist_splice(struct llist_head *llist, struct llist_head *hea
 		__llist_splice(llist, head);
 }
 
-/*! join two llists and reinitialise the emptied llist.
- * \param llist The new linked list to add.
- * \param head  The place to add it in the first llist.
+/*! Join two llists and reinitialise the emptied llist.
+ *  \param llist the new linked list to add.
+ *  \param head  the place to add it within the first llist.
  *
- * The llist at @llist is reinitialised
+ * The llist is reinitialised.
  */
 static inline void llist_splice_init(struct llist_head *llist,
 				    struct llist_head *head)
@@ -206,15 +209,15 @@ static inline void llist_splice_init(struct llist_head *llist,
 	}
 }
 
-/*! Get the struct containing this list entry
- *  \param ptr The \ref llist_head pointer
- *  \param type The type of the struct this is embedded in
- *  \param @member The name of the \ref llist_head within the struct
+/*! Get the struct containing this list entry.
+ *  \param ptr    the llist_head pointer.
+ *  \param type   the type of the struct this is embedded in.
+ *  \param member the name of the llist_head within the struct.
  */
 #define llist_entry(ptr, type, member) \
 	container_of(ptr, type, member)
 
-/*! Get the first element from a list
+/*! Get the first element from a linked list.
  *  \param ptr    the list head to take the element from.
  *  \param type   the type of the struct this is embedded in.
  *  \param member the name of the list_head within the struct.
@@ -224,7 +227,7 @@ static inline void llist_splice_init(struct llist_head *llist,
 #define llist_first_entry(ptr, type, member) \
 	llist_entry((ptr)->next, type, member)
 
-/*! Get the last element from a list
+/*! Get the last element from a list.
  *  \param ptr    the list head to take the element from.
  *  \param type   the type of the struct this is embedded in.
  *  \param member the name of the llist_head within the struct.
@@ -234,7 +237,7 @@ static inline void llist_splice_init(struct llist_head *llist,
 #define llist_last_entry(ptr, type, member) \
 	llist_entry((ptr)->prev, type, member)
 
-/*! Get the first element from a list, or NULL
+/*! Get the first element from a list, or NULL.
  *  \param ptr    the list head to take the element from.
  *  \param type   the type of the struct this is embedded in.
  *  \param member the name of the list_head within the struct.
@@ -244,17 +247,17 @@ static inline void llist_splice_init(struct llist_head *llist,
 #define llist_first_entry_or_null(ptr, type, member) \
 	(!llist_empty(ptr) ? llist_first_entry(ptr, type, member) : NULL)
 
-/*! Iterate over a linked list
- *  \param pos 	The \ref llist_head to use as a loop counter
- *  \param head The head of the list over which to iterate
+/*! Iterate over a linked list.
+ *  \param pos  the llist_head to use as a loop counter.
+ *  \param head the head of the list over which to iterate.
  */
 #define llist_for_each(pos, head) \
 	for (pos = (head)->next, prefetch(pos->next); pos != (head); \
         	pos = pos->next, prefetch(pos->next))
 
-/*! Iterate over a llist (no prefetch)
- *  \param pos 	The \ref llist_head to use as a loop counter
- *  \param head The head of the list over which to iterate
+/*! Iterate over a linked list (no prefetch).
+ *  \param pos  the llist_head to use as a loop counter.
+ *  \param head the head of the list over which to iterate.
  *
  * This variant differs from llist_for_each() in that it's the
  * simplest possible llist iteration code, no prefetching is done.
@@ -264,27 +267,27 @@ static inline void llist_splice_init(struct llist_head *llist,
 #define __llist_for_each(pos, head) \
 	for (pos = (head)->next; pos != (head); pos = pos->next)
 
-/*! Iterate over a llist backwards
- *  \param pos 	The \ref llist_head to use as a loop counter
- *  \param head The head of the list over which to iterate
+/*! Iterate over a linked list backwards.
+ *  \param pos  the llist_head to use as a loop counter.
+ *  \param head the head of the list over which to iterate.
  */
 #define llist_for_each_prev(pos, head) \
 	for (pos = (head)->prev, prefetch(pos->prev); pos != (head); \
         	pos = pos->prev, prefetch(pos->prev))
 
-/*! Iterate over a list; safe against removal of llist entry
- *  \param pos 	The \ref llist_head to use as a loop counter
- *  \param n Another \ref llist_head to use as temporary storage
- *  \param head The head of the list over which to iterate
+/*! Iterate over a linked list, safe against removal of llist entry.
+ *  \param pos  the llist_head to use as a loop counter.
+ *  \param n    another llist_head to use as temporary storage.
+ *  \param head the head of the list over which to iterate.
  */
 #define llist_for_each_safe(pos, n, head) \
 	for (pos = (head)->next, n = pos->next; pos != (head); \
 		pos = n, n = pos->next)
 
-/*! Iterate over llist of given type
- *  \param pos The 'type *' to use as a loop counter
- *  \param head The head of the list over which to iterate
- *  \param member The name of the \ref llist_head within struct \a pos
+/*! Iterate over a linked list of a given type.
+ *  \param pos    the 'type *' to use as a loop counter.
+ *  \param head   the head of the list over which to iterate.
+ *  \param member the name of the llist_head within the struct pos.
  */
 #define llist_for_each_entry(pos, head, member)				\
 	for (pos = llist_entry((head)->next, typeof(*pos), member),	\
@@ -293,10 +296,10 @@ static inline void llist_splice_init(struct llist_head *llist,
 	     pos = llist_entry(pos->member.next, typeof(*pos), member),	\
 		     prefetch(pos->member.next))
 
-/*! Iterate backwards over llist of given type.
- *  \param pos The 'type *' to use as a loop counter
- *  \param head The head of the list over which to iterate
- *  \param member The name of the \ref llist_head within struct \a pos
+/*! Iterate backwards over a linked list of a given type.
+ *  \param pos    the 'type *' to use as a loop counter.
+ *  \param head   the head of the list over which to iterate.
+ *  \param member the name of the llist_head within the struct pos.
  */
 #define llist_for_each_entry_reverse(pos, head, member)			\
 	for (pos = llist_entry((head)->prev, typeof(*pos), member),	\
@@ -305,11 +308,11 @@ static inline void llist_splice_init(struct llist_head *llist,
 	     pos = llist_entry(pos->member.prev, typeof(*pos), member),	\
 		     prefetch(pos->member.prev))
 
-/*! iterate over llist of given type continuing after existing
- * point
- *  \param pos The 'type *' to use as a loop counter
- *  \param head The head of the list over which to iterate
- *  \param member The name of the \ref llist_head within struct \a pos
+/*! Iterate over a linked list of a given type,
+ *  continuing after an existing point.
+ *  \param pos    the 'type *' to use as a loop counter.
+ *  \param head   the head of the list over which to iterate.
+ *  \param member the name of the llist_head within the struct pos.
  */
 #define llist_for_each_entry_continue(pos, head, member) 		\
 	for (pos = llist_entry(pos->member.next, typeof(*pos), member),	\
@@ -318,12 +321,12 @@ static inline void llist_splice_init(struct llist_head *llist,
 	     pos = llist_entry(pos->member.next, typeof(*pos), member),	\
 		     prefetch(pos->member.next))
 
-/*! iterate over llist of given type, safe against removal of
- * non-consecutive(!) llist entries
- *  \param pos The 'type *' to use as a loop counter
- *  \param n Another type * to use as temporary storage
- *  \param head The head of the list over which to iterate
- *  \param member The name of the \ref llist_head within struct \a pos
+/*! Iterate over llist of given type, safe against removal of
+ *  non-consecutive(!) llist entries.
+ *  \param pos    the 'type *' to use as a loop counter.
+ *  \param n      another 'type *' to use as temporary storage.
+ *  \param head   the head of the list over which to iterate.
+ *  \param member the name of the llist_head within the struct pos.
  */
 #define llist_for_each_entry_safe(pos, n, head, member)			\
 	for (pos = llist_entry((head)->next, typeof(*pos), member),	\
@@ -331,10 +334,9 @@ static inline void llist_splice_init(struct llist_head *llist,
 	     &pos->member != (head); 					\
 	     pos = n, n = llist_entry(n->member.next, typeof(*n), member))
 
-/**
- * llist_for_each_rcu	-	iterate over an rcu-protected llist
- * @pos:	the &struct llist_head to use as a loop counter.
- * @head:	the head for your llist.
+/*! Iterate over an rcu-protected llist.
+ *  \param pos  the llist_head to use as a loop counter.
+ *  \param head the head of the list over which to iterate.
  */
 #define llist_for_each_rcu(pos, head) \
 	for (pos = (head)->next, prefetch(pos->next); pos != (head); \
@@ -344,22 +346,19 @@ static inline void llist_splice_init(struct llist_head *llist,
 	for (pos = (head)->next; pos != (head); \
         	pos = pos->next, ({ smp_read_barrier_depends(); 0;}))
         	
-/**
- * llist_for_each_safe_rcu	-	iterate over an rcu-protected llist safe
- *					against removal of llist entry
- * @pos:	the &struct llist_head to use as a loop counter.
- * @n:		another &struct llist_head to use as temporary storage
- * @head:	the head for your llist.
+/*! Iterate over an rcu-protected llist, safe against removal of llist entry.
+ *  \param pos  the llist_head to use as a loop counter.
+ *  \param n    another llist_head to use as temporary storage.
+ *  \param head the head of the list over which to iterate.
  */
 #define llist_for_each_safe_rcu(pos, n, head) \
 	for (pos = (head)->next, n = pos->next; pos != (head); \
 		pos = n, ({ smp_read_barrier_depends(); 0;}), n = pos->next)
 
-/**
- * llist_for_each_entry_rcu	-	iterate over rcu llist of given type
- * @pos:	the type * to use as a loop counter.
- * @head:	the head for your llist.
- * @member:	the name of the llist_struct within the struct.
+/*! Iterate over an rcu-protected llist of a given type.
+ *  \param pos    the 'type *' to use as a loop counter.
+ *  \param head   the head of the list over which to iterate.
+ *  \param member the name of the llist_struct within the struct.
  */
 #define llist_for_each_entry_rcu(pos, head, member)			\
 	for (pos = llist_entry((head)->next, typeof(*pos), member),	\
@@ -370,18 +369,16 @@ static inline void llist_splice_init(struct llist_head *llist,
 		     prefetch(pos->member.next))
 
 
-/**
- * llist_for_each_continue_rcu	-	iterate over an rcu-protected llist 
- *			continuing after existing point.
- * @pos:	the &struct llist_head to use as a loop counter.
- * @head:	the head for your llist.
+/*! Iterate over an rcu-protected llist, continuing after existing point.
+ *  \param pos  the llist_head to use as a loop counter.
+ *  \param head the head of the list over which to iterate.
  */
 #define llist_for_each_continue_rcu(pos, head) \
 	for ((pos) = (pos)->next, prefetch((pos)->next); (pos) != (head); \
         	(pos) = (pos)->next, ({ smp_read_barrier_depends(); 0;}), prefetch((pos)->next))
 
-/*! count nr of llist items by iterating.
- *  \param head The llist head to count items of.
+/*! Count number of llist items by iterating.
+ *  \param head the llist head to count items of.
  *  \returns Number of items.
  *
  * This function is not efficient, mostly useful for small lists and non time