From 3a1d5c84ed2fa4034f86e3b204129c139471516e Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@sunset.davemloft.net>
Date: Wed, 27 Sep 2006 19:43:02 -0700
Subject: [PATCH] [SPARC]: Don't zero out tail during
 copy_from_user_inatomic().

Actually, since we use the same code for all the copying
types in and out of userspace, we check at runtime whether
preemption is disabled.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/lib/copy_user.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/sparc/lib/copy_user.S b/arch/sparc/lib/copy_user.S
index 577505b692ae..ef095b6c43b1 100644
--- a/arch/sparc/lib/copy_user.S
+++ b/arch/sparc/lib/copy_user.S
@@ -14,6 +14,7 @@
 #include <asm/ptrace.h>
 #include <asm/asmmacro.h>
 #include <asm/page.h>
+#include <asm/thread_info.h>
 
 /* Work around cpp -rob */
 #define ALLOC #alloc
@@ -366,6 +367,9 @@ fixupretl:
 	blu	1f
 	 cmp	%o1, %g1
 	bgeu	1f
+	 ld	[%g6 + TI_PREEMPT], %g1
+	cmp	%g1, 0
+	bne	1f
 	 nop
 	save	%sp, -64, %sp
 	mov	%i0, %o0
-- 
2.20.1