HelenOS sources

TMPFS_FS_TYPE     296 uspace/srv/system/system.c 	errno_t rc = vfs_mount_path(TMPFS_MOUNT_POINT, TMPFS_FS_TYPE, "", "", 0, 0);
TMPFS_FS_TYPE     298 uspace/srv/system/system.c 	    TMPFS_FS_TYPE, NULL, rc);
HelenOS homepage, sources at GitHub