x86, hibernate: Initialize mmu_cr4_features during boot

Restore the initialization of mmu_cr4_features during boot, which was
removed without comment in checkin e5f15b45ddf3afa2bbbb10c7ea34fb32b6de0a0e

x86: Cleanup highmap after brk is concluded

thereby breaking resume from hibernate.  This restores previous
functionality in approximately the same place, and corrects the
reading of %cr4 on pre-CPUID hardware (%cr4 exists if and only if
CPUID is supported.)

However, part of the problem is that the hibernate suspend/resume
sequence should manage the save/restore of %cr4 explicitly.

Signed-off-by: H. Peter Anvin <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: Stefano Stabellini <[email protected]>
Cc: Yinghai Lu <[email protected]>
LKML-Reference: <[email protected]>

0 files changed, 0 insertions, 0 deletions