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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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7
drivers/char/random.c
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@ -1139,18 +1139,12 @@ static int random_fasync(int fd, struct file *filp, int on)
return fasync_helper(fd, filp, on, &fasync);
}
static int random_release(struct inode *inode, struct file *filp)
{
return fasync_helper(-1, filp, 0, &fasync);
}
const struct file_operations random_fops = {
.read = random_read,
.write = random_write,
.poll = random_poll,
.unlocked_ioctl = random_ioctl,
.fasync = random_fasync,
.release = random_release,
};
const struct file_operations urandom_fops = {
@ -1158,7 +1152,6 @@ const struct file_operations urandom_fops = {
.write = random_write,
.unlocked_ioctl = random_ioctl,
.fasync = random_fasync,
.release = random_release,
};
/***************************************************************