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ARM: swpan: fix nwfpe for uaccess changes
author
Russell King
<rmk+kernel@arm.linux.org.uk>
Sun, 6 Sep 2015 23:29:15 +0000
(
00:29
+0100)
committer
Russell King
<rmk+kernel@arm.linux.org.uk>
Wed, 9 Sep 2015 22:26:11 +0000
(23:26 +0100)
NWFPE needs to access userspace to check whether the next instruction
is another FP instruction. Allow userspace access for this read.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/nwfpe/entry.S
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diff --git
a/arch/arm/nwfpe/entry.S
b/arch/arm/nwfpe/entry.S
index
71df435
..
39c20af
100644
(file)
--- a/
arch/arm/nwfpe/entry.S
+++ b/
arch/arm/nwfpe/entry.S
@@
-95,9
+95,10
@@
emulate:
reteq r4 @ no, return failure
next:
+ uaccess_enable r3
.Lx1: ldrt r6, [r5], #4 @ get the next instruction and
@ increment PC
-
+ uaccess_disable r3
and r2, r6, #0x0F000000 @ test for FP insns
teq r2, #0x0C000000
teqne r2, #0x0D000000