On Tue 17-04-18 13:39:33, Sasha Levin wrote: [...] > But mm/ commits don't come only from these people. Here's a concrete > example we can discuss: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61611f70958d86f659bca25c02ae69413747a8d I would be really careful. Because that reqiures to audit all callers to be compliant with the change. This is just _too_ easy to backport without noticing a failure. Now consider the other side. Is there any real bug report backing this? This behavior was like that for quite some time but I do not remember any actual bug report and the changelog doesn't mention one either. It is about theoretical problem. So if this was to be merged to stable then the changelog should contain a big fat warning about the existing users and how they should be checked. Besides that I can see Reviewed-by: akpm and Andrew is usually very careful about stable backports so there probably _was_ a reson to exclude stable. -- Michal Hocko SUSE Labs