writeback: harmonize writeback threads naming
The write-back code mixes words "thread" and "task" for the same things. This
is not a big deal, but still an inconsistency.
hch: a convention I tend to use and I've seen in various places
is to always use _task for the storage of the task_struct pointer,
and thread everywhere else. This especially helps with having
foo_thread for the actual thread and foo_task for a global
variable keeping the task_struct pointer
This patch renames:
* 'bdi_add_default_flusher_task()' -> 'bdi_add_default_flusher_thread()'
* 'bdi_forker_task()' -> 'bdi_forker_thread()'
because bdi threads are 'bdi_writeback_thread()', so these names are more
consistent.
This patch also amends commentaries and makes them refer the forker and bdi
threads as "thread", not "task".
Also, while on it, make 'bdi_add_default_flusher_thread()' declaration use
'static void' instead of 'void static' and make checkpatch.pl happy.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index ac78a333..4e9ed2a 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -50,7 +50,7 @@
static int bdi_sync_supers(void *);
static void sync_supers_timer_fn(unsigned long);
-static void bdi_add_default_flusher_task(struct backing_dev_info *bdi);
+static void bdi_add_default_flusher_thread(struct backing_dev_info *bdi);
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
@@ -279,10 +279,10 @@
}
/*
- * kupdated() used to do this. We cannot do it from the bdi_forker_task()
+ * kupdated() used to do this. We cannot do it from the bdi_forker_thread()
* or we risk deadlocking on ->s_umount. The longer term solution would be
* to implement sync_supers_bdi() or similar and simply do it from the
- * bdi writeback tasks individually.
+ * bdi writeback thread individually.
*/
static int bdi_sync_supers(void *unused)
{
@@ -318,7 +318,7 @@
bdi_arm_supers_timer();
}
-static int bdi_forker_task(void *ptr)
+static int bdi_forker_thread(void *ptr)
{
struct bdi_writeback *me = ptr;
@@ -354,7 +354,7 @@
!bdi_has_dirty_io(bdi))
continue;
- bdi_add_default_flusher_task(bdi);
+ bdi_add_default_flusher_thread(bdi);
}
set_current_state(TASK_INTERRUPTIBLE);
@@ -376,7 +376,7 @@
/*
* This is our real job - check for pending entries in
- * bdi_pending_list, and create the tasks that got added
+ * bdi_pending_list, and create the threads that got added
*/
bdi = list_entry(bdi_pending_list.next, struct backing_dev_info,
bdi_list);
@@ -387,7 +387,7 @@
wb->task = kthread_run(bdi_writeback_thread, wb, "flush-%s",
dev_name(bdi->dev));
/*
- * If task creation fails, then readd the bdi to
+ * If thread creation fails, then readd the bdi to
* the pending list and force writeout of the bdi
* from this forker thread. That will free some memory
* and we can try again.
@@ -430,10 +430,10 @@
}
/*
- * Add the default flusher task that gets created for any bdi
+ * Add the default flusher thread that gets created for any bdi
* that has dirty data pending writeout
*/
-void static bdi_add_default_flusher_task(struct backing_dev_info *bdi)
+static void bdi_add_default_flusher_thread(struct backing_dev_info *bdi)
{
if (!bdi_cap_writeback_dirty(bdi))
return;
@@ -445,10 +445,10 @@
}
/*
- * Check with the helper whether to proceed adding a task. Will only
+ * Check with the helper whether to proceed adding a thread. Will only
* abort if we two or more simultanous calls to
- * bdi_add_default_flusher_task() occured, further additions will block
- * waiting for previous additions to finish.
+ * bdi_add_default_flusher_thread() occured, further additions will
+ * block waiting for previous additions to finish.
*/
if (!test_and_set_bit(BDI_pending, &bdi->state)) {
list_del_rcu(&bdi->bdi_list);
@@ -506,7 +506,7 @@
if (bdi_cap_flush_forker(bdi)) {
struct bdi_writeback *wb = &bdi->wb;
- wb->task = kthread_run(bdi_forker_task, wb, "bdi-%s",
+ wb->task = kthread_run(bdi_forker_thread, wb, "bdi-%s",
dev_name(dev));
if (IS_ERR(wb->task)) {
wb->task = NULL;