Use kernel_ident_mapping_init() to initialize kernel page tables where
possible, replacing manual initialization, reducing code duplication.

v4:
 - Reviewed-bys from Kai;
 - Fix comment in acpi_mp_setup_reset() (Rafael);
v3:
 - Reviewed-bys from Tom;
 - Improve commit messages;
v2:
 - A separate patch to change what PA is mapped at relocate_kernel() VA.
 - Improve commit messages;
 - Add Reveiwed-by from Kai;

Kirill A. Shutemov (4):
  x86/mm/ident_map: Fix virtual address wrap to zero
  x86/acpi: Replace manual page table initialization with
    kernel_ident_mapping_init()
  x86/64/kexec: Map original relocate_kernel() in
    init_transition_pgtable()
  x86/64/kexec: Rewrite init_transition_pgtable() with
    kernel_ident_mapping_init()

 arch/x86/include/asm/kexec.h       |  5 +-
 arch/x86/kernel/acpi/madt_wakeup.c | 73 +++++-------------------
 arch/x86/kernel/machine_kexec_64.c | 89 +++++++++++-------------------
 arch/x86/mm/ident_map.c            | 14 +----
 4 files changed, 50 insertions(+), 131 deletions(-)

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2.43.0