saner FASYNC handling on file close

As it is, all instances of ->release() for files that have ->fasync()
need to remember to evict file from fasync lists; forgetting that
creates a hole and we actually have a bunch that *does* forget.

So let's keep our lives simple - let __fput() check FASYNC in
file->f_flags and call ->fasync() there if it's been set.  And lose that
crap in ->release() instances - leaving it there is still valid, but we
don't have to bother anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 0 insertions, 17 deletions

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 3524bef..1070db3 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -235,7 +235,6 @@ static int evdev_release(struct inode *inode, struct file *file)
 		evdev_ungrab(evdev, client);
 	mutex_unlock(&evdev->mutex);
 
-	evdev_fasync(-1, file, 0);
 	evdev_detach_client(evdev, client);
 	kfree(client);
 
diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 65d7077..a85b148 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -244,7 +244,6 @@ static int joydev_release(struct inode *inode, struct file *file)
 	struct joydev_client *client = file->private_data;
 	struct joydev *joydev = client->joydev;
 
-	joydev_fasync(-1, file, 0);
 	joydev_detach_client(joydev, client);
 	kfree(client);
 
diff --git a/drivers/input/misc/hp_sdc_rtc.c b/drivers/input/misc/hp_sdc_rtc.c
index 82ec6b1..216a559 100644
--- a/drivers/input/misc/hp_sdc_rtc.c
+++ b/drivers/input/misc/hp_sdc_rtc.c
@@ -71,7 +71,6 @@ static int hp_sdc_rtc_ioctl(struct inode *inode, struct file *file,
 static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait);
 
 static int hp_sdc_rtc_open(struct inode *inode, struct file *file);
-static int hp_sdc_rtc_release(struct inode *inode, struct file *file);
 static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on);
 
 static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off,
@@ -414,17 +413,6 @@ static int hp_sdc_rtc_open(struct inode *inode, struct file *file)
         return 0;
 }
 
-static int hp_sdc_rtc_release(struct inode *inode, struct file *file)
-{
-	/* Turn off interrupts? */
-
-        if (file->f_flags & FASYNC) {
-                hp_sdc_rtc_fasync (-1, file, 0);
-        }
-
-        return 0;
-}
-
 static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on)
 {
         return fasync_helper (fd, filp, on, &hp_sdc_rtc_async_queue);
@@ -680,7 +668,6 @@ static const struct file_operations hp_sdc_rtc_fops = {
         .poll =		hp_sdc_rtc_poll,
         .ioctl =	hp_sdc_rtc_ioctl,
         .open =		hp_sdc_rtc_open,
-        .release =	hp_sdc_rtc_release,
         .fasync =	hp_sdc_rtc_fasync,
 };
 
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index 8137e50..d8c056f 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -519,7 +519,6 @@ static int mousedev_release(struct inode *inode, struct file *file)
 	struct mousedev_client *client = file->private_data;
 	struct mousedev *mousedev = client->mousedev;
 
-	mousedev_fasync(-1, file, 0);
 	mousedev_detach_client(mousedev, client);
 	kfree(client);
 
diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c
index 470770c..06bbd0e 100644
--- a/drivers/input/serio/serio_raw.c
+++ b/drivers/input/serio/serio_raw.c
@@ -135,7 +135,6 @@ static int serio_raw_release(struct inode *inode, struct file *file)
 
 	mutex_lock(&serio_raw_mutex);
 
-	serio_raw_fasync(-1, file, 0);
 	serio_raw_cleanup(serio_raw);
 
 	mutex_unlock(&serio_raw_mutex);