Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool updates from Ingo Molnar:
 "The biggest changes in this cycle were the vmlinux.o optimizations by
   Peter Zijlstra, which are preparatory and optimization work to run
   objtool against the much richer vmlinux.o object file, to perform
   new, whole-program section based logic. That work exposed a handful
   of problems with the existing code, which fixes and optimizations are
   merged here. The complete 'vmlinux.o and noinstr' work is still work
   in progress, targeted for v5.8.

  There's also assorted fixes and enhancements from Josh Poimboeuf.

  In particular I'd like to draw attention to commit 644592d3,
  which turns fatal objtool errors into failed kernel builds. This
  behavior is IMO now justified on multiple grounds (it's easy currently
  to not notice an essentially corrupted kernel build), and the commit
  has been in -next testing for several weeks, but there could still be
  build failures with old or weird toolchains. Should that be widespread
  or high profile enough then I'd suggest a quick revert, to not hold up
  the merge window"

* 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
  objtool: Re-arrange validate_functions()
  objtool: Optimize find_rela_by_dest_range()
  objtool: Delete cleanup()
  objtool: Optimize read_sections()
  objtool: Optimize find_symbol_by_name()
  objtool: Resize insn_hash
  objtool: Rename find_containing_func()
  objtool: Optimize find_symbol_*() and read_symbols()
  objtool: Optimize find_section_by_name()
  objtool: Optimize find_section_by_index()
  objtool: Add a statistics mode
  objtool: Optimize find_symbol_by_index()
  x86/kexec: Make relocate_kernel_64.S objtool clean
  x86/kexec: Use RIP relative addressing
  objtool: Rename func_for_each_insn_all()
  objtool: Rename func_for_each_insn()
  objtool: Introduce validate_return()
  objtool: Improve call destination function detection
  objtool: Fix clang switch table edge case
  objtool: Add relocation check for alternative sections
  ...