vfs: do bulk POLL* -> EPOLL* replacement

This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

fs/kernfs/file.c

@@ -823,7 +823,7 @@ void kernfs_drain_open_files(struct kernfs_node *kn)
  * the content and then you use 'poll' or 'select' to wait for
  * the content to change.  When the content changes (assuming the
  * manager for the kobject supports notification), poll will
- * return POLLERR|POLLPRI, and select will return the fd whether
+ * return EPOLLERR|EPOLLPRI, and select will return the fd whether
  * it is waiting for read, write, or exceptions.
  * Once poll/select indicates that the value has changed, you
  * need to close and re-open the file, or seek to 0 and read again.
@@ -851,7 +851,7 @@ static __poll_t kernfs_fop_poll(struct file *filp, poll_table *wait)
 	return DEFAULT_POLLMASK;
 
  trigger:
-	return DEFAULT_POLLMASK|POLLERR|POLLPRI;
+	return DEFAULT_POLLMASK|EPOLLERR|EPOLLPRI;
 }
 
 static void kernfs_notify_workfn(struct work_struct *work)