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authorTejun Heo <tj@kernel.org>2013-01-23 09:32:30 -0800
committerTejun Heo <tj@kernel.org>2013-01-23 09:32:30 -0800
commit8723d5037cafea09c7242303c6c8e5d7058cec61 (patch)
tree198cd51a199501557657dac0f2c46faa6be0a4e4 /kernel/async.c
parentc14afb82ffff5903a701a9fb737ac20f36d1f755 (diff)
downloadvexpress-lsk-8723d5037cafea09c7242303c6c8e5d7058cec61.tar.gz
async: bring sanity to the use of words domain and running
In the beginning, running lists were literal struct list_heads. Later on, struct async_domain was added. For some reason, while the conversion substituted list_heads with async_domains, the variable names weren't fully converted. In more places, "running" was used for struct async_domain while other places adopted new "domain" name. The situation is made much worse by having async_domain's running list named "domain" and async_entry's field pointing to async_domain named "running". So, we end up with mix of "running" and "domain" for variable names for async_domain, with the field names of async_domain and async_entry swapped between "running" and "domain". It feels almost intentionally made to be as confusing as possible. Bring some sanity by * Renaming all async_domain variables "domain". * s/async_running/async_dfl_domain/ * s/async_domain->domain/async_domain->running/ * s/async_entry->running/async_entry->domain/ Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Dan Williams <djbw@fb.com> Cc: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/async.c')
-rw-r--r--kernel/async.c68
1 files changed, 34 insertions, 34 deletions
diff --git a/kernel/async.c b/kernel/async.c
index 6c68fc3fae7..29d51d483be 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -64,7 +64,7 @@ static async_cookie_t next_cookie = 1;
#define MAX_WORK 32768
static LIST_HEAD(async_pending);
-static ASYNC_DOMAIN(async_running);
+static ASYNC_DOMAIN(async_dfl_domain);
static LIST_HEAD(async_domains);
static DEFINE_SPINLOCK(async_lock);
static DEFINE_MUTEX(async_register_mutex);
@@ -75,7 +75,7 @@ struct async_entry {
async_cookie_t cookie;
async_func_ptr *func;
void *data;
- struct async_domain *running;
+ struct async_domain *domain;
};
static DECLARE_WAIT_QUEUE_HEAD(async_done);
@@ -86,7 +86,7 @@ static atomic_t entry_count;
/*
* MUST be called with the lock held!
*/
-static async_cookie_t __lowest_in_progress(struct async_domain *running)
+static async_cookie_t __lowest_in_progress(struct async_domain *domain)
{
async_cookie_t first_running = next_cookie; /* infinity value */
async_cookie_t first_pending = next_cookie; /* ditto */
@@ -96,13 +96,13 @@ static async_cookie_t __lowest_in_progress(struct async_domain *running)
* Both running and pending lists are sorted but not disjoint.
* Take the first cookies from both and return the min.
*/
- if (!list_empty(&running->domain)) {
- entry = list_first_entry(&running->domain, typeof(*entry), list);
+ if (!list_empty(&domain->running)) {
+ entry = list_first_entry(&domain->running, typeof(*entry), list);
first_running = entry->cookie;
}
list_for_each_entry(entry, &async_pending, list) {
- if (entry->running == running) {
+ if (entry->domain == domain) {
first_pending = entry->cookie;
break;
}
@@ -111,13 +111,13 @@ static async_cookie_t __lowest_in_progress(struct async_domain *running)
return min(first_running, first_pending);
}
-static async_cookie_t lowest_in_progress(struct async_domain *running)
+static async_cookie_t lowest_in_progress(struct async_domain *domain)
{
unsigned long flags;
async_cookie_t ret;
spin_lock_irqsave(&async_lock, flags);
- ret = __lowest_in_progress(running);
+ ret = __lowest_in_progress(domain);
spin_unlock_irqrestore(&async_lock, flags);
return ret;
}
@@ -132,11 +132,11 @@ static void async_run_entry_fn(struct work_struct *work)
struct async_entry *pos;
unsigned long flags;
ktime_t uninitialized_var(calltime), delta, rettime;
- struct async_domain *running = entry->running;
+ struct async_domain *domain = entry->domain;
/* 1) move self to the running queue, make sure it stays sorted */
spin_lock_irqsave(&async_lock, flags);
- list_for_each_entry_reverse(pos, &running->domain, list)
+ list_for_each_entry_reverse(pos, &domain->running, list)
if (entry->cookie < pos->cookie)
break;
list_move_tail(&entry->list, &pos->list);
@@ -162,8 +162,8 @@ static void async_run_entry_fn(struct work_struct *work)
/* 3) remove self from the running queue */
spin_lock_irqsave(&async_lock, flags);
list_del(&entry->list);
- if (running->registered && --running->count == 0)
- list_del_init(&running->node);
+ if (domain->registered && --domain->count == 0)
+ list_del_init(&domain->node);
/* 4) free the entry */
kfree(entry);
@@ -175,7 +175,7 @@ static void async_run_entry_fn(struct work_struct *work)
wake_up(&async_done);
}
-static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct async_domain *running)
+static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct async_domain *domain)
{
struct async_entry *entry;
unsigned long flags;
@@ -201,13 +201,13 @@ static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct a
INIT_WORK(&entry->work, async_run_entry_fn);
entry->func = ptr;
entry->data = data;
- entry->running = running;
+ entry->domain = domain;
spin_lock_irqsave(&async_lock, flags);
newcookie = entry->cookie = next_cookie++;
list_add_tail(&entry->list, &async_pending);
- if (running->registered && running->count++ == 0)
- list_add_tail(&running->node, &async_domains);
+ if (domain->registered && domain->count++ == 0)
+ list_add_tail(&domain->node, &async_domains);
atomic_inc(&entry_count);
spin_unlock_irqrestore(&async_lock, flags);
@@ -230,7 +230,7 @@ static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct a
*/
async_cookie_t async_schedule(async_func_ptr *ptr, void *data)
{
- return __async_schedule(ptr, data, &async_running);
+ return __async_schedule(ptr, data, &async_dfl_domain);
}
EXPORT_SYMBOL_GPL(async_schedule);
@@ -238,18 +238,18 @@ EXPORT_SYMBOL_GPL(async_schedule);
* async_schedule_domain - schedule a function for asynchronous execution within a certain domain
* @ptr: function to execute asynchronously
* @data: data pointer to pass to the function
- * @running: running list for the domain
+ * @domain: the domain
*
* Returns an async_cookie_t that may be used for checkpointing later.
- * @running may be used in the async_synchronize_*_domain() functions
- * to wait within a certain synchronization domain rather than globally.
- * A synchronization domain is specified via the running queue @running to use.
- * Note: This function may be called from atomic or non-atomic contexts.
+ * @domain may be used in the async_synchronize_*_domain() functions to
+ * wait within a certain synchronization domain rather than globally. A
+ * synchronization domain is specified via @domain. Note: This function
+ * may be called from atomic or non-atomic contexts.
*/
async_cookie_t async_schedule_domain(async_func_ptr *ptr, void *data,
- struct async_domain *running)
+ struct async_domain *domain)
{
- return __async_schedule(ptr, data, running);
+ return __async_schedule(ptr, data, domain);
}
EXPORT_SYMBOL_GPL(async_schedule_domain);
@@ -289,7 +289,7 @@ void async_unregister_domain(struct async_domain *domain)
mutex_lock(&async_register_mutex);
spin_lock_irq(&async_lock);
WARN_ON(!domain->registered || !list_empty(&domain->node) ||
- !list_empty(&domain->domain));
+ !list_empty(&domain->running));
domain->registered = 0;
spin_unlock_irq(&async_lock);
mutex_unlock(&async_register_mutex);
@@ -298,10 +298,10 @@ EXPORT_SYMBOL_GPL(async_unregister_domain);
/**
* async_synchronize_full_domain - synchronize all asynchronous function within a certain domain
- * @domain: running list to synchronize on
+ * @domain: the domain to synchronize
*
* This function waits until all asynchronous function calls for the
- * synchronization domain specified by the running list @domain have been done.
+ * synchronization domain specified by @domain have been done.
*/
void async_synchronize_full_domain(struct async_domain *domain)
{
@@ -312,17 +312,17 @@ EXPORT_SYMBOL_GPL(async_synchronize_full_domain);
/**
* async_synchronize_cookie_domain - synchronize asynchronous function calls within a certain domain with cookie checkpointing
* @cookie: async_cookie_t to use as checkpoint
- * @running: running list to synchronize on
+ * @domain: the domain to synchronize
*
* This function waits until all asynchronous function calls for the
- * synchronization domain specified by running list @running submitted
- * prior to @cookie have been done.
+ * synchronization domain specified by @domain submitted prior to @cookie
+ * have been done.
*/
-void async_synchronize_cookie_domain(async_cookie_t cookie, struct async_domain *running)
+void async_synchronize_cookie_domain(async_cookie_t cookie, struct async_domain *domain)
{
ktime_t uninitialized_var(starttime), delta, endtime;
- if (!running)
+ if (!domain)
return;
if (initcall_debug && system_state == SYSTEM_BOOTING) {
@@ -330,7 +330,7 @@ void async_synchronize_cookie_domain(async_cookie_t cookie, struct async_domain
starttime = ktime_get();
}
- wait_event(async_done, lowest_in_progress(running) >= cookie);
+ wait_event(async_done, lowest_in_progress(domain) >= cookie);
if (initcall_debug && system_state == SYSTEM_BOOTING) {
endtime = ktime_get();
@@ -352,7 +352,7 @@ EXPORT_SYMBOL_GPL(async_synchronize_cookie_domain);
*/
void async_synchronize_cookie(async_cookie_t cookie)
{
- async_synchronize_cookie_domain(cookie, &async_running);
+ async_synchronize_cookie_domain(cookie, &async_dfl_domain);
}
EXPORT_SYMBOL_GPL(async_synchronize_cookie);