x86/fpu: Don't cache access to fpu_fpregs_owner_ctx

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Subject: x86/fpu: Don't cache access to fpu_fpregs_owner_ctx
From: Barret Rhoden <brho@xxxxxxxxxx>
Date: Mon, 2 Dec 2019 18:24:49 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0

commit 59c4bd853abcea95eccc167a7d7fd5f1a5f47b98 upstream

Hi -

Please apply to 5.4. This commit fixes floating point registercorruption that became triggerable starting with v5.2.


Thanks,

Barret

Follow-Ups:
- Re: x86/fpu: Don't cache access to fpu_fpregs_owner_ctx
  - From: Greg KH

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