From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sun, 6 Sep 2015 23:29:15 +0000 (+0100)
Subject: ARM: swpan: fix nwfpe for uaccess changes
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=39dc53deff30d9b239ac36cfeb0ef2022d03a449;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ARM: swpan: fix nwfpe for uaccess changes

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>
---

diff --git a/arch/arm/nwfpe/entry.S b/arch/arm/nwfpe/entry.S
index 71df43547659..39c20afad7ed 100644
--- 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