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

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>

2 files changed, 3 insertions, 3 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index fe59bd145d21..cda50fe9250a 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -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);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index be1ff932033b..3dc5e2a5cc38 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -673,7 +673,7 @@ static int mounts_open_common(struct inode *inode, struct file *file,
         p->m.private = p;
         p->ns = ns;
         p->root = root;
-        p->event = ns->event;
+        p->m.poll_event = ns->event;
 
         return 0;