Pull x86 cleanups from Thomas Gleixner:
 "A set of cleanups across x86:

   - Use memremap() for the EISA probe instead of ioremap(). EISA is
     strictly memory and not MMIO

   - Cleanups and enhancement all over the place"

* tag 'x86-cleanups-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/EISA: Dereference memory directly instead of using readl()
  x86/extable: Remove unused declaration fixup_bug()
  x86/boot/64: Strip percpu address space when setting up GDT descriptors
  x86/cpu: Clarify the error message when BIOS does not support SGX
  x86/kexec: Add comments around swap_pages() assembly to improve readability
  x86/kexec: Fix a comment of swap_pages() assembly
  x86/sgx: Fix a W=1 build warning in function comment
  x86/EISA: Use memremap() to probe for the EISA BIOS signature
  x86/mtrr: Remove obsolete declaration for mtrr_bp_restore()
  x86/cpu_entry_area: Annotate percpu_setup_exception_stacks() as __init