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authorCornelia Huck <cornelia.huck@de.ibm.com>2009-01-19 13:45:33 +0100
committerArjan van de Ven <arjan@linux.intel.com>2009-02-08 09:56:11 -0800
commitf30d5b307c694e03368ab55f2f96b0ca4131e775 (patch)
tree86f1ceb849bc186e4fa9b64fd8459668f4133390 /kernel/async.c
parent86532d8b167e71e24da8b564348b52977b76d15f (diff)
downloadvexpress-lsk-f30d5b307c694e03368ab55f2f96b0ca4131e775.tar.gz
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>
Diffstat (limited to 'kernel/async.c')
-rw-r--r--kernel/async.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/kernel/async.c b/kernel/async.c
index 078d5ed150d..b5f0d4b9493 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -209,18 +209,43 @@ static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct l
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 {
@@ -229,12 +254,27 @@ 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;
@@ -257,6 +297,13 @@ void async_synchronize_cookie_special(async_cookie_t cookie, struct list_head *r
}
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);