loopback_test      77 drivers/staging/greybus/tools/loopback_test.c struct loopback_test {
loopback_test    5015 drivers/tty/synclink_gt.c static int loopback_test(struct slgt_info *info)
loopback_test    5223 drivers/tty/synclinkmp.c static bool loopback_test(SLMP_INFO *info)