x86, 64-bit: Set data segments to null after switching to 64-bit mode

This prevents kernel threads from inheriting non-null segment
selectors, and causing optimizations in __switch_to() to be
ineffective.

Signed-off-by: Brian Gerst <[email protected]>
Cc: Tim Blechmann <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Jan Beulich <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

0 files changed, 0 insertions, 0 deletions