Question Regarding KABI stability and GA Kernel

sunita shah matalia.sunita at
Sat May 27 17:26:22 UTC 2017

Kernel Team,

Could you please answer below question?


On Sat, May 27, 2017 at 2:38 AM, sunita shah <matalia.sunita at>

> Hello Ubuntu Kernel Team,
> I have a question regarding 16.04 Ubuntu Kernel and ABI compatibility. I
> recently ran into an issue while using "get_user_pages_locked" API. I have
> an out-of-tree kernel module which uses this API and was working fine on
> 16.04.0, however when I switched to 16.04.2 (desktop ISO, kernel version
> 4.8), I found that API signatures were changed and I had to fix that
> manually in the production environment.
> My question is If I stick to 16.04.0/1 GA kernel version and never
> explicitly opt for HWE kernel, would Ubuntu ensure that all patch releases
> on GA kernel don't break the existing API surface? I understand that new
> APIs might be added, but I am more concerned about existing APIs being used
> by my module.
> Appreciate your help,
> Sunita.
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