[PATCH 00/34] put_user_pages(): miscellaneous call sites

Michal Hocko mhocko at kernel.org
Fri Aug 2 09:12:44 UTC 2019


On Thu 01-08-19 19:19:31, john.hubbard at gmail.com wrote:
[...]
> 2) Convert all of the call sites for get_user_pages*(), to
> invoke put_user_page*(), instead of put_page(). This involves dozens of
> call sites, and will take some time.

How do we make sure this is the case and it will remain the case in the
future? There must be some automagic to enforce/check that. It is simply
not manageable to do it every now and then because then 3) will simply
be never safe.

Have you considered coccinele or some other scripted way to do the
transition? I have no idea how to deal with future changes that would
break the balance though.
-- 
Michal Hocko
SUSE Labs


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