The fourth 3.10 prepatch is available for testing. "Anyway, rc4 is smaller than rc3 (yay!). But it could certainly be smaller still (boo!). There's the usual gaggle of driver fixes (drm, pinctrl, scsi target, fbdev, xen), but also filesystems (cifs, xfs, with small fixes to reiserfs and nfs)." Note that it is only available via git for now; patches and tarballs will follow eventually.