[PATCH 20/39] NLKD/x86-64 - switch_to() floating point adjustment

Touching of the floating point state in a kernel debugger must be
NMI-safe, specifically math_state_restore() must be able to deal with
being called out of an NMI context. In order to do that reliably, the
context switch code must take care to not leave a window open where
the current task's TS_USEDFPU flag and CR0.TS could get out of sync.

From: Jan Beulich <[email protected]>

(actual patch attached)

Attachment: linux-2.6.14-nlkd-x86_64-switch_to-fpu.patch
Description: Binary data

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• Follow-Ups:
  • Re: [PATCH 20/39] NLKD/x86-64 - switch_to() floating point adjustment
    • From: Andi Kleen <[email protected]>
  • [PATCH 21/39] NLKD/x86-64 - core adjustments
    • From: "Jan Beulich" <[email protected]>

• References:
  • [PATCH 0/39] NLKD - Novell Linux Kernel Debugger
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 1/39] NLKD - an alternative kallsyms approach
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 2/39] NLKD - an alternative early ioremap approach
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 3/39] NLKD - early/late CPU up/down notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 6/39] NLKD - early panic notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 7/39] NLKD - task create/destroy notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 8/39] NLKD - rmmod notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 9/39] NLKD - hotkey notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 10/39] NLKD - console layout change notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 11/39] NLKD - time adjustment
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 13/39] NLKD/x86-64 - time adjustment
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 18/39] NLKD/x86-64 - INT1/INT3 handling changes
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 19/39] NLKD/x86-64 - stack-pointer-invalid markers
    • From: "Jan Beulich" <[email protected]>

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