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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 supported. kpatch-build will return an error if the patch attempts
to do so. to do so.
- Patches which modify statically allocated data are not supported. - Patches which modify statically allocated data are not directly supported.
kpatch-build will detect that and return an error. (In the future kpatch-build will detect that and return an error. This limitation can be
we will add a facility to support it. It will probably require the overcome by using callbacks or shadow variables, as described in the
user to write code which runs at patch module loading time which manually [Patch Author Guide](doc/patch-author-guide.md).
updates the data.)
- Patches which change the way a function interacts with dynamically - Patches which change the way a function interacts with dynamically
allocated data might be safe, or might not. It isn't possible for allocated data might be safe, or might not. It isn't possible for