On Tue, Oct 3, 2017 at 8:54 PM, Ricardo Neri
[off-list ref] wrote:

Both head_32.S and head_64.S utilize the same value to initialize the
control register CR0. Also, other parts of the kernel might want to access
this initial definition (e.g., emulation code for User-Mode Instruction
Prevention uses this state to provide a sane dummy value for CR0 when
emulating the smsw instruction). Thus, relocate this definition to a
header file from which it can be conveniently accessed.

Reviewed-by: Andy Lutomirski <luto@kernel.org>

with the slight caveat that I think it might be a wee bit better if
UMIP emulation used a separate define UMIP_REPORTED_CR0.

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