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fs: seq_file - add event counter to simplify poll() support

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Moving the event counter into the dynamically allocated 'struc seq_file'
allows poll() support without the need to allocate its own tracking
structure.

All current users are switched over to use the new counter.

Requested-by: Andrew Morton akpm@linux-foundation.org
Acked-by: NeilBrown <neilb@suse.de>
Tested-by: Lucas De Marchi lucas.demarchi@profusion.mobi
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Kay Sievers
2011-07-12 20:48:39 +02:00
committed by Al Viro
parent 72c5052ddc
commit f15146380d
6 changed files with 20 additions and 43 deletions
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4
fs/namespace.c
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@@ -934,8 +934,8 @@ int mnt_had_events(struct proc_mounts *p)
int res = 0;
br_read_lock(vfsmount_lock);
if (p->event != ns->event) {
p->event = ns->event;
if (p->m.poll_event != ns->event) {
p->m.poll_event = ns->event;
res = 1;
}
br_read_unlock(vfsmount_lock);