[PATCH v3 08/15] livepatch: separate enabled and patched states

Miroslav Benes mbenes at suse.cz
Fri Dec 23 23:54:50 AEDT 2016


On Thu, 8 Dec 2016, Josh Poimboeuf wrote:

> Once we have a consistency model, patches and their objects will be
> enabled and disabled at different times.  For example, when a patch is
> disabled, its loaded objects' funcs can remain registered with ftrace
> indefinitely until the unpatching operation is complete and they're no
> longer in use.
> 
> It's less confusing if we give them different names: patches can be
> enabled or disabled; objects (and their funcs) can be patched or
> unpatched:
> 
> - Enabled means that a patch is logically enabled (but not necessarily
>   fully applied).
> 
> - Patched means that an object's funcs are registered with ftrace and
>   added to the klp_ops func stack.
> 
> Also, since these states are binary, represent them with booleans
> instead of ints.
> 
> Signed-off-by: Josh Poimboeuf <jpoimboe at redhat.com>

Acked-by: Miroslav Benes <mbenes at suse.cz>

Miroslav


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