Linux kernel 4.4 is a long-term supported (LTS) branch, which is currently used by some of the most popular GNU/Linux distributions, including Ubuntu 16.04 LTS (Xenial Xerus), and it will receive maintenance updates for a few more years than normal kernel series that aren’t marked as “long-term” on the kernel.org website. According to the appended shortlog, Linux Kernel 4.4.19 LTS is a major release that changes a total of 146 files , with 1709 insertions and 875 deletions. New features in Linux kernel 4.4.19 LTS include improvements to the AMDGPU graphics driver for AMD Radeon GPUs, many AArch64 (ARM64), ARM, MIPS, and x86 architecture updates, various fixes for the CIFS, Btrfs, JBD2, and NFS filesystems, and lots of updated drivers, this time for Bluetooth, InfiniBand, CPUFreq, EDAC, GPIO, I2C, IOMMU, MD, MTD, PCI, PINCTRL, RTC, SCSI, SPI, TTY, USB, and Virtio devices.