From: Stuart Menefy <stuart.menefy@st.com>
Date: Wed, 2 Jul 2008 08:51:23 +0000 (+0900)
Subject: sh: Conditionally re-enable IRQs in fault path.
X-Git-Tag: v2.6.27-rc1~29^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f2fb4e4f647dabf1177d3ce164988e73482d76b1;p=pandora-kernel.git

sh: Conditionally re-enable IRQs in fault path.

The current kernel behaviour is to reenable interrupts unconditionally
when taking a page fault. This patch changes this to only enable them
if interrupts were previously enabled.

It also fixes a problem seen with this fix in place: the kernel previously
flushed the vsyscall page when handling a signal, which is not only
unncessary, but caused a possible sleep with interrupts disabled.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

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