+unsigned long __fdget_pos(unsigned int fd)
+{
+ unsigned long v = __fdget(fd);
+ struct file *file = (struct file *)(v & ~3);
+
+ if (file && (file->f_mode & FMODE_ATOMIC_POS)) {
+ if (file_count(file) > 1) {
+ v |= FDPUT_POS_UNLOCK;
+ mutex_lock(&file->f_pos_lock);
+ }
+ }
+ return v;
+}
+
+/*
+ * We only lock f_pos if we have threads or if the file might be
+ * shared with another process. In both cases we'll have an elevated
+ * file count (done either by fdget() or by fork()).
+ */
+