There are a lot of objtool changes in this cycle, all across the map:

 - Speed up objtool significantly, especially when there are large number of sections
 - Improve objtool's understanding of special instructions such as IRET,
   to reduce the number of annotations required
 - Implement 'noinstr' validation
 - Do baby steps for non-x86 objtool use
 - Simplify/fix retpoline decoding
 - Add vmlinux validation
 - Improve documentation
 - Fix various bugs and apply smaller cleanups

Signed-off-by: Ingo Molnar <mingo@kernel.org>
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