• Joe Lawrence's avatar
    livepatch: add (un)patch callbacks · 93862e38
    Joe Lawrence authored
    Provide livepatch modules a klp_object (un)patching notification
    mechanism.  Pre and post-(un)patch callbacks allow livepatch modules to
    setup or synchronize changes that would be difficult to support in only
    patched-or-unpatched code contexts.
    
    Callbacks can be registered for target module or vmlinux klp_objects,
    but each implementation is klp_object specific.
    
      - Pre-(un)patch callbacks run before any (un)patching transition
        starts.
    
      - Post-(un)patch callbacks run once an object has been (un)patched and
        the klp_patch fully transitioned to its target state.
    
    Example use cases include modification of global data and registration
    of newly available services/handlers.
    
    See Documentation/livepatch/callbacks.txt for details and
    samples/livepatch/ for examples.
    Signed-off-by: default avatarJoe Lawrence <joe.lawrence@redhat.com>
    Acked-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
    Acked-by: default avatarMiroslav Benes <mbenes@suse.cz>
    Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
    93862e38
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