Could I get any needed corrections on this. Especially on the "???"
[EMAIL PROTECTED] linux-2.6.26]$ diff -U3
include/linux/completion.{h.orig,h}|more
--- include/linux/completion.h.orig 2008-08-13 00:56:52.0 -0700
+++ include/linux/completion.h 2008-08-18 13:00:23.0 -0700
@@ -10,6 +10,16 @@
#include
+/**
+ * struct completion - structure used to maintain state for a "completion"
+ * @done: counting variable used to signal completion
+ * @wait: internal wait queue head; used for locking and synchronization
+ *
+ * This is the structure used to maintain the state for a "completion". See
+ * also: complete(), wait_for_completion() (and friends _timeout,
+ * _interruptible, _interruptible_timeout, and _killable),
init_completion(),
+ * and macros DECLARE_COMPLETION() and INIT_COMPLETION().
+ */
struct completion {
unsigned int done;
wait_queue_head_t wait;
@@ -36,6 +46,13 @@
# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
#endif
+/**
+ * init_completion: - Initialize a dynamically allocated completion
+ * @x: completion structure that is to be initialized
+ *
+ * This inline function will initialize a dynamically created completion
+ * structure.
+ */
static inline void init_completion(struct completion *x)
{
x->done = 0;
--- kernel/sched.c.orig 2008-08-13 02:22:42.0 -0700
+++ kernel/sched.c 2008-08-18 13:31:03.0 -0700
@@ -4363,6 +4363,13 @@
}
EXPORT_SYMBOL_GPL(__wake_up_sync); /* For internal use only */
+/**
+ * complete: - signals a single thread waiting on this completion
+ * @x: holds the state of this particular completion
+ *
+ * This will wake up a single thread waiting on this completion. If
multiple
+ * threads are waiting ???
+ */
void complete(struct completion *x)
{
unsigned long flags;
@@ -4374,6 +4381,12 @@
}
EXPORT_SYMBOL(complete);
+/**
+ * complete_all: - signals all threads waiting on this completion
+ * @x: holds the state of this particular completion
+ *
+ * This will wake up all threads waiting on this particular completion
event.
+ */
void complete_all(struct completion *x)
{
unsigned long flags;
@@ -4425,12 +4438,27 @@
return timeout;
}
+/**
+ * wait_for_completion: - waits for completion of a task
+ * @x: holds the state of this particular completion
+ *
+ * This waits to be signaled for completion of a specific task. It is NOT
+ * interruptible and there is no timeout.
+ */
void __sched wait_for_completion(struct completion *x)
{
wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_UNINTERRUPTIBLE);
}
EXPORT_SYMBOL(wait_for_completion);
+/**
+ * wait_for_completion_timeout: - waits for completion of a task
(w/timeout)
+ * @x: holds the state of this particular completion
+ * @timeout: timeout value in jiffies
+ *
+ * This waits to be signaled for completion of a specific task. It is NOT
+ * interruptible. But there is a timeout in jiffies.
+ */
unsigned long __sched
wait_for_completion_timeout(struct completion *x, unsigned long timeout)
{
@@ -4438,6 +4466,13 @@
}
EXPORT_SYMBOL(wait_for_completion_timeout);
+/**
+ * wait_for_completion_interruptible: - waits for completion of a task
(w/intr)
+ * @x: holds the state of this particular completion
+ *
+ * This waits to be signaled for completion of a specific task. It is
+ * interruptible.
+ */
int __sched wait_for_completion_interruptible(struct completion *x)
{
long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT,
TASK_INTERRUPTIBLE);
@@ -4447,6 +4482,14 @@
}
EXPORT_SYMBOL(wait_for_completion_interruptible);
+/**
+ * wait_for_completion_interruptible_timeout: - waits for completion
(w/(to,int
r))
+ * @x: holds the state of this particular completion
+ * @timeout: timeout value in jiffies
+ *
+ * This waits to be signaled for completion of a specific task. It is
+ * interruptible. And there is a timeout in jiffies.
+ */
unsigned long __sched
wait_for_completion_interruptible_timeout(struct completion *x,
unsigned long timeout)
@@ -4455,6 +4498,13 @@
}
EXPORT_SYMBOL(wait_for_completion_interruptible_timeout);
+/**
+ * wait_for_completion_killable: - waits for completion of a task
(killable)
+ * @x: holds the state of this particular completion
+ *
+ * This waits to be signaled for completion of a specific task. It is
+ * killable (???).
+ */
int __sched wait_for_completion_killable(struct completion *x)
{
long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_KILLABLE);
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