On Thu, Jul 11, 2019 at 10:20:10AM -0400, Alan Stern wrote: > Also, the last I looked, Android was using version 4.9 of the kernel. > Since this patch won't get into the kernel until version 5.4 at the > earliest, it may be quite a while before it shows up in Android. Android does not "use" a specific version of the kernel, they only specify the "minimum kernel version" for a specific Android release. As an example, for Android Q, they require the 4.9 kernel as a minimum, and they have a specific LTS version as well, with updates required over time as well. That being said, you can always use a newer kernel version for Android, and they publish 4.14 and 4.19 kernel trees if you wish to use them, as well as they have a "mainline" branch that is now at 5.2 for companies that want to use those kernels. But for new features, like this one, you will need Android userspace changes to start relying on the kernel change, so that will take a bit of work, and by then the new kernel feature could have been backported as well if it is something they want to rely on. So yes, it would be at least a year before it showed up in Android given they do a release on a yearly cadence. thanks, greg k-h
