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README.md: mention callbacks/shadow variables in limitations 

Signed-off-by: Simon Ruderich <simon@ruderich.org>
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Simon Ruderich 2018-10-21 08:41:35 +02:00
parent fb2801e4a5
commit ae820f5d19
1 changed files with 4 additions and 5 deletions
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@ -473,11 +473,10 @@ Limitations
supported. kpatch-build will return an error if the patch attempts
to do so.
- Patches which modify statically allocated data are not supported.
kpatch-build will detect that and return an error. (In the future
we will add a facility to support it. It will probably require the
user to write code which runs at patch module loading time which manually
updates the data.)
- Patches which modify statically allocated data are not directly supported.
kpatch-build will detect that and return an error. This limitation can be
overcome by using callbacks or shadow variables, as described in the
[Patch Author Guide](doc/patch-author-guide.md).
- Patches which change the way a function interacts with dynamically
allocated data might be safe, or might not. It isn't possible for