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[PATCH 0/3] fix and cleanup FPU ownership management

Subject: [PATCH 0/3] fix and cleanup FPU ownership management
From: Atsushi Nemoto <>
Date: Sat, 25 Nov 2006 00:03:34 +0900 (JST)
Original-recipient: rfc822;
This patchset fixes several potential problem related FPU ownership
management.  The main problem is
save_fp_contect()/restore_fp_context() might sleep on accessing user
stack and therefore might lose FPU ownership in middle of them.

The first patch ("do_fpe() cleanup") is just a cleanup to preparation.

The second patch ("Allow CpU exception in kernel partially") is main
part.  This is an alternative of the patch posted before:

The third patch ("Cleanup FPU ownership management") is an another
cleanup and get rid of most preempt_disable()/preempt_enable() pairs

Please review.  Thank you.

Atsushi Nemoto

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