async: Add some documentation.
Add some kerneldoc to the async interface. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
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@ -209,18 +209,43 @@ static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct l
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return newcookie;
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}
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/**
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* async_schedule - schedule a function for asynchronous execution
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* @ptr: function to execute asynchronously
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* @data: data pointer to pass to the function
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*
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* Returns an async_cookie_t that may be used for checkpointing later.
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* Note: This function may be called from atomic or non-atomic contexts.
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*/
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async_cookie_t async_schedule(async_func_ptr *ptr, void *data)
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{
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return __async_schedule(ptr, data, &async_running);
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}
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EXPORT_SYMBOL_GPL(async_schedule);
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/**
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* async_schedule_special - schedule a function for asynchronous execution with a special running queue
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* @ptr: function to execute asynchronously
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* @data: data pointer to pass to the function
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* @running: list head to add to while running
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*
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* Returns an async_cookie_t that may be used for checkpointing later.
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* @running may be used in the async_synchronize_*_special() functions
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* to wait on a special running queue rather than on the global running
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* queue.
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* Note: This function may be called from atomic or non-atomic contexts.
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*/
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async_cookie_t async_schedule_special(async_func_ptr *ptr, void *data, struct list_head *running)
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{
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return __async_schedule(ptr, data, running);
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}
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EXPORT_SYMBOL_GPL(async_schedule_special);
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/**
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* async_synchronize_full - synchronize all asynchronous function calls
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*
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* This function waits until all asynchronous function calls have been done.
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*/
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void async_synchronize_full(void)
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{
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do {
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@ -229,12 +254,27 @@ void async_synchronize_full(void)
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}
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EXPORT_SYMBOL_GPL(async_synchronize_full);
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/**
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* async_synchronize_full_special - synchronize all asynchronous function calls for a running list
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* @list: running list to synchronize on
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*
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* This function waits until all asynchronous function calls for the running
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* list @list have been done.
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*/
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void async_synchronize_full_special(struct list_head *list)
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{
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async_synchronize_cookie_special(next_cookie, list);
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}
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EXPORT_SYMBOL_GPL(async_synchronize_full_special);
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/**
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* async_synchronize_cookie_special - synchronize asynchronous function calls on a running list with cookie checkpointing
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* @cookie: async_cookie_t to use as checkpoint
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* @running: running list to synchronize on
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*
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* This function waits until all asynchronous function calls for the running
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* list @list submitted prior to @cookie have been done.
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*/
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void async_synchronize_cookie_special(async_cookie_t cookie, struct list_head *running)
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{
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ktime_t starttime, delta, endtime;
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@ -257,6 +297,13 @@ void async_synchronize_cookie_special(async_cookie_t cookie, struct list_head *r
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}
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EXPORT_SYMBOL_GPL(async_synchronize_cookie_special);
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/**
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* async_synchronize_cookie - synchronize asynchronous function calls with cookie checkpointing
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* @cookie: async_cookie_t to use as checkpoint
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*
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* This function waits until all asynchronous function calls prior to @cookie
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* have been done.
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*/
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void async_synchronize_cookie(async_cookie_t cookie)
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{
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async_synchronize_cookie_special(cookie, &async_running);
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