On 4/14/20 12:28 PM, Josh Poimboeuf wrote:
Better late than never, these patches add simplifications and
improvements for some issues Peter found six months ago, as part of his
non-writable text code (W^X) cleanups.
Highlights:
- Remove the livepatch arch-specific .klp.arch sections, which were used
to do paravirt patching and alternatives patching for livepatch
replacement code.
- Add support for jump labels in patched code.
Re: jump labels and late-module patching support...
Is there still an issue of a non-exported static key defined in a
to-be-patched module referenced and resolved via klp-relocation when the
livepatch module is loaded first? (Basically the same case I asked Petr
about in his split livepatch module PoC. [1])
Or should we declare this an invalid klp-relocation use case and force
the livepatch author to use static_key_enabled()?
[1] https://lore.kernel.org/lkml/20200407205740.GA17061@xxxxxxxxxx/
-- Joe
