zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/lib/getuser.S b/ap/os/linux/linux-3.4.x/arch/arm/lib/getuser.S
new file mode 100644
index 0000000..9b06bb4
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/lib/getuser.S
@@ -0,0 +1,80 @@
+/*
+ * linux/arch/arm/lib/getuser.S
+ *
+ * Copyright (C) 2001 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Idea from x86 version, (C) Copyright 1998 Linus Torvalds
+ *
+ * These functions have a non-standard call interface to make them more
+ * efficient, especially as they return an error value in addition to
+ * the "real" return value.
+ *
+ * __get_user_X
+ *
+ * Inputs: r0 contains the address
+ * r1 contains the address limit, which must be preserved
+ * Outputs: r0 is the error code
+ * r2 contains the zero-extended value
+ * lr corrupted
+ *
+ * No other registers must be altered. (see <asm/uaccess.h>
+ * for specific ASM register usage).
+ *
+ * Note that ADDR_LIMIT is either 0 or 0xc0000000.
+ * Note also that it is intended that __get_user_bad is not global.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/errno.h>
+#include <asm/domain.h>
+
+ENTRY(__get_user_1)
+ check_uaccess r0, 1, r1, r2, __get_user_bad
+1: TUSER(ldrb) r2, [r0]
+ mov r0, #0
+ mov pc, lr
+ENDPROC(__get_user_1)
+
+ENTRY(__get_user_2)
+ check_uaccess r0, 2, r1, r2, __get_user_bad
+#ifdef CONFIG_CPU_USE_DOMAINS
+rb .req ip
+2: ldrbt r2, [r0], #1
+3: ldrbt rb, [r0], #0
+#else
+rb .req r0
+2: ldrb r2, [r0]
+3: ldrb rb, [r0, #1]
+#endif
+#ifndef __ARMEB__
+ orr r2, r2, rb, lsl #8
+#else
+ orr r2, rb, r2, lsl #8
+#endif
+ mov r0, #0
+ mov pc, lr
+ENDPROC(__get_user_2)
+
+ENTRY(__get_user_4)
+ check_uaccess r0, 4, r1, r2, __get_user_bad
+4: TUSER(ldr) r2, [r0]
+ mov r0, #0
+ mov pc, lr
+ENDPROC(__get_user_4)
+
+__get_user_bad:
+ mov r2, #0
+ mov r0, #-EFAULT
+ mov pc, lr
+ENDPROC(__get_user_bad)
+
+.pushsection __ex_table, "a"
+ .long 1b, __get_user_bad
+ .long 2b, __get_user_bad
+ .long 3b, __get_user_bad
+ .long 4b, __get_user_bad
+.popsection