Linux Kernel 3.18.21 LTS Out Now with ARM, MIPS, HPFS, and Btrfs Improvements

Linux kernel 3.18.21 LTS is here to add improvements to the ARM, ARM64, AVR32, MIPS, PowerPC (PPC), s390, SPARC, and x86 hardware architectures, to fix issues in the Btrfs, HPFS, NFS, and OCFS2 file systems, to enhance the networking and sound infrastructures, as well as to update multiple drivers, especially for things like ACPI, ATA, Bluetooth, CLK, CPUFreq, Crypto, GPU, HID, I2C, iiO, MD, MMC, PHY, SCSI, iSCSI, USB, and Xen.