Previously, Linus Torvalds had Linux 5.5-rc7 release pointed out that statement, he may eventually released stable version 5.5 next week. Currently, in accordance with its plan, a stable version of Linux 5.5 release has been completed.
Torvalds in the announcement pointed out that despite this week's patch has increased and downtime due around Christmas and New Year holidays, people are worried about Linux 5.5 period may be extended, but it chose to publish on time 5.5 kernel, rather than select additional release candidate version.
Linux 5.5 brought many changes, which include: support for Raspberry Pi 4, AMD Navi GPU overclocking, support for the new and upcoming Intel platforms, enabled by default five pages in the case, than the current user space utilities convenient and better NVMe drive temperature of the driver, supports voice Chromebook wake, the core unit KUnit for testing, and the like.
This also means that, Linux 5.6 merge window will open immediately. Linux 5.6 looks like it will be a compelling version of its changes include adding WireGuard, initial USB4 support, network improvements, many new hardware features and much more. Linux 5.6 should be released in April, but it is for Ubuntu 20.04 LTS it was too close, so the upcoming release of Ubuntu Linux version will almost certainly be based on the 5.5 kernel.