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Commit 8e9d2089 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 

* 'bkl-removal' of git://git.lwn.net/linux-2.6:
  Rationalize fasync return values
  Move FASYNC bit handling to f_op->fasync()
  Use f_lock to protect f_flags
  Rename struct file->f_ep_lock
parents ba1eb95c 60aa4924

Documentation/filesystems/Locking

+5 −2
Original line number Diff line number Diff line
@@ -437,8 +437,11 @@ grab BKL for cases when we close a file that had been opened r/w, but that 
can and should be done using the internal locking with smaller critical areas).

Current worst offender is ext2_get_block()...



->fasync() is a mess. This area needs a big cleanup and that will probably

affect locking.

->fasync() is called without BKL protection, and is responsible for

maintaining the FASYNC bit in filp->f_flags.  Most instances call

fasync_helper(), which does that maintenance, so it's not normally

something one needs to worry about.  Return values > 0 will be mapped to

zero in the VFS layer.



->readdir() and ->ioctl() on directories must be changed. Ideally we would

move ->readdir() to inode_operations and use a separate method for directory

drivers/char/sonypi.c

+1 −6
Original line number Diff line number Diff line
@@ -888,12 +888,7 @@ static irqreturn_t sonypi_irq(int irq, void *dev_id) 


static int sonypi_misc_fasync(int fd, struct file *filp, int on)

{

	int retval;



	retval = fasync_helper(fd, filp, on, &sonypi_device.fifo_async);

	if (retval < 0)

		return retval;

	return 0;

	return fasync_helper(fd, filp, on, &sonypi_device.fifo_async);

}



static int sonypi_misc_release(struct inode *inode, struct file *file)

drivers/char/tty_io.c

+2 −3
Original line number Diff line number Diff line
@@ -2162,13 +2162,12 @@ static int fionbio(struct file *file, int __user *p) 
	if (get_user(nonblock, p))

		return -EFAULT;



	/* file->f_flags is still BKL protected in the fs layer - vomit */

	lock_kernel();

	spin_lock(&file->f_lock);

	if (nonblock)

		file->f_flags |= O_NONBLOCK;

	else

		file->f_flags &= ~O_NONBLOCK;

	unlock_kernel();

	spin_unlock(&file->f_lock);

	return 0;

}

drivers/gpu/drm/drm_fops.c

+1 −5
Original line number Diff line number Diff line
@@ -337,14 +337,10 @@ int drm_fasync(int fd, struct file *filp, int on) 
{

	struct drm_file *priv = filp->private_data;

	struct drm_device *dev = priv->minor->dev;

	int retcode;



	DRM_DEBUG("fd = %d, device = 0x%lx\n", fd,

		  (long)old_encode_dev(priv->minor->device));

	retcode = fasync_helper(fd, filp, on, &dev->buf_async);

	if (retcode < 0)

		return retcode;

	return 0;

	return fasync_helper(fd, filp, on, &dev->buf_async);

}

EXPORT_SYMBOL(drm_fasync);

drivers/hid/usbhid/hiddev.c

+1 −4
Original line number Diff line number Diff line
@@ -227,12 +227,9 @@ void hiddev_report_event(struct hid_device *hid, struct hid_report *report) 
 */

static int hiddev_fasync(int fd, struct file *file, int on)

{

	int retval;

	struct hiddev_list *list = file->private_data;



	retval = fasync_helper(fd, file, on, &list->fasync);



	return retval < 0 ? retval : 0;

	return fasync_helper(fd, file, on, &list->fasync);

}