https://bugzilla.kernel.org/show_bug.cgi?id=97141

--- Comment #4 from Lee, Chun-Yi <[email protected]> ---
The original position of acpi_early_init() is after efi_enter_virtual_mode(),
73f7d1ca3 patch moved acpi_early_init() to the position before
acpi_early_init() for two reasons:
 - Find the BGRT table earlier.                <=== move to before
efi_enter_virtual_mode()
 - Prepare setting system clock with ACPI TAD. <=== move to before
timekeeping_init()

The c4e1acbb3 patch reverted the part of ACPI TAD, it moved acpi_early_init()
to before efi_enter_vritual_mode() but not the original position: after
efi_enter_vritual_mode()

The original discussion about EFI benefit is here:
  https://lkml.org/lkml/2013/12/20/471

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