[PATCH] 2.5.34-bk fcntl lockup

This fixes endless loop without schedule which happens as soon as smbd
invokes fcntl64(7, F_SETLK64, ...).  fcntl_setlk64 gets cmd F_SETLK64,
not F_SETLK tested in the loop;

Maybe return value from posix_lock_file should be changed to -EINPROGRESS
or -EJUKEBOX instead of testing passed cmd in callers, but this oneliner
works too. If you preffer changing posix_lock_file return value to clearly
distinugish between -EAGAIN and lock request queued, I'll do that.

fs/locks.c

@@ -1588,7 +1588,7 @@ int fcntl_setlk64(struct file *filp, unsigned int cmd, struct flock64 *l)
 
 	for (;;) {
 		error = posix_lock_file(filp, file_lock);
-		if ((error != -EAGAIN) || (cmd == F_SETLK))
+		if ((error != -EAGAIN) || (cmd == F_SETLK64))
 			break;
 		error = wait_event_interruptible(file_lock->fl_wait,
 				!file_lock->fl_next);