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023f2340f0
Boris (and the robot) reported that objtool grew a new complaint about unreachable instructions. Upon inspection it was immediately clear the __weak zombie instructions struck again. For the unweary, the linker will simply remove the symbol for overriden __weak symbols but leave the instructions in place, creating unreachable instructions -- and objtool likes to report these. Commit4adb236867("objtool: Ignore extra-symbol code") was supposed to have dealt with that, but the new commit9f2899fe36("objtool: Add option to generate prefix symbols") subtly broke that logic by created unvisited symbols. Fixes:9f2899fe36("objtool: Add option to generate prefix symbols") Reported-by: Borislav Petkov <bp@alien8.de> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.