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Commit e7957ec6 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  sysfs: Allow sysfs_notify_dirent to be called from interrupt context.
  sysfs: Allow sysfs_move_dir(..., NULL) again.
parents 59c0b586 83db93f4

fs/sysfs/dir.c

+2 −1
Original line number Diff line number Diff line
@@ -894,7 +894,8 @@ int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent_kobj) 


	mutex_lock(&sysfs_rename_mutex);

	BUG_ON(!sd->s_parent);

	new_parent_sd = new_parent_kobj->sd ? new_parent_kobj->sd : &sysfs_root;

	new_parent_sd = (new_parent_kobj && new_parent_kobj->sd) ?

		new_parent_kobj->sd : &sysfs_root;



	error = 0;

	if (sd->s_parent == new_parent_sd)

fs/sysfs/file.c

+8 −6
Original line number Diff line number Diff line
@@ -268,7 +268,7 @@ static int sysfs_get_open_dirent(struct sysfs_dirent *sd, 
	struct sysfs_open_dirent *od, *new_od = NULL;



 retry:

	spin_lock(&sysfs_open_dirent_lock);

	spin_lock_irq(&sysfs_open_dirent_lock);



	if (!sd->s_attr.open && new_od) {

		sd->s_attr.open = new_od;
@@ -281,7 +281,7 @@ static int sysfs_get_open_dirent(struct sysfs_dirent *sd, 
		list_add_tail(&buffer->list, &od->buffers);

	}



	spin_unlock(&sysfs_open_dirent_lock);

	spin_unlock_irq(&sysfs_open_dirent_lock);



	if (od) {

		kfree(new_od);
@@ -315,8 +315,9 @@ static void sysfs_put_open_dirent(struct sysfs_dirent *sd, 
				  struct sysfs_buffer *buffer)

{

	struct sysfs_open_dirent *od = sd->s_attr.open;

	unsigned long flags;



	spin_lock(&sysfs_open_dirent_lock);

	spin_lock_irqsave(&sysfs_open_dirent_lock, flags);



	list_del(&buffer->list);

	if (atomic_dec_and_test(&od->refcnt))
@@ -324,7 +325,7 @@ static void sysfs_put_open_dirent(struct sysfs_dirent *sd, 
	else

		od = NULL;



	spin_unlock(&sysfs_open_dirent_lock);

	spin_unlock_irqrestore(&sysfs_open_dirent_lock, flags);



	kfree(od);

}
@@ -456,8 +457,9 @@ static unsigned int sysfs_poll(struct file *filp, poll_table *wait) 
void sysfs_notify_dirent(struct sysfs_dirent *sd)

{

	struct sysfs_open_dirent *od;

	unsigned long flags;



	spin_lock(&sysfs_open_dirent_lock);

	spin_lock_irqsave(&sysfs_open_dirent_lock, flags);



	od = sd->s_attr.open;

	if (od) {
@@ -465,7 +467,7 @@ void sysfs_notify_dirent(struct sysfs_dirent *sd) 
		wake_up_interruptible(&od->poll);

	}



	spin_unlock(&sysfs_open_dirent_lock);

	spin_unlock_irqrestore(&sysfs_open_dirent_lock, flags);

}

EXPORT_SYMBOL_GPL(sysfs_notify_dirent);