tree 5288184d2d8535c826c8b3c33d79b2529c83542b
parent 068f59143d821553e7a55cdbd69142b05e245d47
author Stuart Menefy <stuart.menefy@st.com> 1214988683 +0900
committer Paul Mundt <lethal@linux-sh.org> 1217236233 +0900

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>