Linux kernel 3.9.5 includes a few arch changes
(ARM, PowerPC, x86), many updated drivers
(ACPI, Wireless, Radeon, i915, Nouveau, ATA, Xen), various filesystem changes (FUSE, ReiserFS, FAT, CIFS, NFS, JFS, NILFS2, XFS, OCFS2), and other small changes.
I'm announcing the release of the 3.9.5 kernel. All users of the 3.9 kernel series must upgrade.