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saner FASYNC handling on file close

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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>
This commit is contained in:
Al Viro
2008-10-31 23:28:30 +00:00
committed by Linus Torvalds
parent 3318a386e4
commit 233e70f422
36 changed files with 13 additions and 109 deletions
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13
drivers/input/misc/hp_sdc_rtc.c
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@ -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,
};