From: H. Peter Anvin <hpa@zytor.com>
Date: Tue, 23 Dec 2008 01:56:05 +0000 (-0800)
Subject: x86: prioritize the FPU traps for the error code
X-Git-Tag: v2.6.29-rc1~587^2~4^12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=adf77bac052bb5bf0722b2ce2af9fefc5b2d2a71;p=pandora-kernel.git

x86: prioritize the FPU traps for the error code

In the case of multiple FPU errors, prioritize the error codes,
instead of returning __SI_FAULT, which ends up pushing a 0 as the
error code to userspace, a POSIX violation.

For i386, we will simply return if there are no errors at all; for
x86-64 this is probably a "can't happen" (and the code should be
unified), but for this patch, return __SI_FAULT|SI_KERNEL if this ever
happens.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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