FD_ZERO(&rfds);
if (mdstat_fd >= 0)
FD_SET(mdstat_fd, &fds);
- if (fd >= 0)
- FD_SET(fd, &rfds);
+ if (fd >= 0) {
+ struct stat stb;
+ fstat(fd, &stb);
+ if ((stb.st_mode & S_IFMT) == S_IFREG)
+ /* Must be a /proc or /sys fd, so expect
+ * POLLPRI
+ * i.e. an 'exceptional' event.
+ */
+ FD_SET(fd, &fds);
+ else
+ FD_SET(fd, &rfds);
+ }
if (mdstat_fd > maxfd)
maxfd = mdstat_fd;