The kernel is updated periodically, and released when new Android releases are published. Additionally, patches make it into OTA updates. Google only knows about and can update Google Experience Devices; Google has no knowledge of or ability to update non-GEDs.
There is no necessary link between Android version and kernel version, other than that both increase monotonically. Yes, users are notified of updates. GED users with Froyo are getting their 2.2.1 update now, in fact. Updates are signed. Non-GED OEMs and carriers can ship updates however they like, or not at all. Frequency of updates could be one factor that informed buyers use to decide. -- You received this message because you are subscribed to the Google Groups "Android Security Discussions" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/android-security-discuss?hl=en.
