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Message-ID: <20090119134533.0c86d2d5@gondolin>
Date: Mon, 19 Jan 2009 13:45:33 +0100
From: Cornelia Huck <cornelia.huck@...ibm.com>
To: Arjan van de Ven <arjan@...radead.org>
Cc: <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/3] async: Add some documentation.
Add some kerneldoc to the async interface.
Signed-off-by: Cornelia Huck <cornelia.huck@...ibm.com>
---
kernel/async.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
--- linux-2.6.orig/kernel/async.c
+++ linux-2.6/kernel/async.c
@@ -206,18 +206,43 @@ static async_cookie_t __async_schedule(a
return newcookie;
}
+/**
+ * async_schedule - schedule a function for asynchronous execution
+ * @ptr: function to execute asynchronously
+ * @data: data pointer to pass to the function
+ *
+ * Returns an async_cookie_t that may be used for checkpointing later.
+ * Note: This function may be called from atomic or non-atomic contexts.
+ */
async_cookie_t async_schedule(async_func_ptr *ptr, void *data)
{
return __async_schedule(ptr, data, &async_running);
}
EXPORT_SYMBOL_GPL(async_schedule);
+/**
+ * async_schedule_special - schedule a function for asynchronous execution with a special running queue
+ * @ptr: function to execute asynchronously
+ * @data: data pointer to pass to the function
+ * @running: list head to add to while running
+ *
+ * Returns an async_cookie_t that may be used for checkpointing later.
+ * @running may be used in the async_synchronize_*_special() functions
+ * to wait on a special running queue rather than on the global running
+ * queue.
+ * Note: This function may be called from atomic or non-atomic contexts.
+ */
async_cookie_t async_schedule_special(async_func_ptr *ptr, void *data, struct list_head *running)
{
return __async_schedule(ptr, data, running);
}
EXPORT_SYMBOL_GPL(async_schedule_special);
+/**
+ * async_synchronize_full - synchronize all asynchronous function calls
+ *
+ * This function waits until all asynchronous function calls have been done.
+ */
void async_synchronize_full(void)
{
do {
@@ -226,12 +251,27 @@ void async_synchronize_full(void)
}
EXPORT_SYMBOL_GPL(async_synchronize_full);
+/**
+ * async_synchronize_full_special - synchronize all asynchronous function calls for a running list
+ * @list: running list to synchronize on
+ *
+ * This function waits until all asynchronous function calls for the running
+ * list @list have been done.
+ */
void async_synchronize_full_special(struct list_head *list)
{
async_synchronize_cookie_special(next_cookie, list);
}
EXPORT_SYMBOL_GPL(async_synchronize_full_special);
+/**
+ * async_synchronize_cookie_special - synchronize asynchronous function calls on a running list with cookie checkpointing
+ * @cookie: async_cookie_t to use as checkpoint
+ * @running: running list to synchronize on
+ *
+ * This function waits until all asynchronous function calls for the running
+ * list @list submitted prior to @cookie have been done.
+ */
void async_synchronize_cookie_special(async_cookie_t cookie, struct list_head *running)
{
ktime_t starttime, delta, endtime;
@@ -253,6 +293,13 @@ void async_synchronize_cookie_special(as
}
EXPORT_SYMBOL_GPL(async_synchronize_cookie_special);
+/**
+ * async_synchronize_cookie - synchronize asynchronous function calls with cookie checkpointing
+ * @cookie: async_cookie_t to use as checkpoint
+ *
+ * This function waits until all asynchronous function calls prior to @cookie
+ * have been done.
+ */
void async_synchronize_cookie(async_cookie_t cookie)
{
async_synchronize_cookie_special(cookie, &async_running);
--
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