From f1d0e0ba58c9057b4a9d8887effae2ff0f15731f Mon Sep 17 00:00:00 2001
From: Kshitij Kulshreshtha <kkhere.geo@gmail.com>
Date: Mon, 2 Aug 2010 00:02:49 +0200
Subject: [PATCH] compat: backport hex_to_bin first introduced in v2.6.35

Signed-off-by: Kshitij Kulshreshtha <kkhere.geo@gmail.com>
---
 compat/Makefile               |  1 +
 compat/compat-2.6.35.c        | 34 ++++++++++++++++++++++++++++++++++
 include/linux/compat-2.6.35.h |  2 ++
 3 files changed, 37 insertions(+)
 create mode 100644 compat/compat-2.6.35.c

diff --git a/compat/Makefile b/compat/Makefile
index 2005ff3a6cdd..bcd8fe76df0b 100644
--- a/compat/Makefile
+++ b/compat/Makefile
@@ -26,3 +26,4 @@ compat-$(CONFIG_COMPAT_KERNEL_30) += compat-2.6.30.o
 compat-$(CONFIG_COMPAT_KERNEL_31) += compat-2.6.31.o
 compat-$(CONFIG_COMPAT_KERNEL_32) += compat-2.6.32.o
 compat-$(CONFIG_COMPAT_KERNEL_33) += compat-2.6.33.o
+compat-$(CONFIG_COMPAT_KERNEL_35) += compat-2.6.35.o
diff --git a/compat/compat-2.6.35.c b/compat/compat-2.6.35.c
new file mode 100644
index 000000000000..0d702ed39a20
--- /dev/null
+++ b/compat/compat-2.6.35.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010    Kshitij Kulshreshtha <kkhere.geo@gmail.com>
+ *
+ * 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.
+ *
+ * Compatibility file for Linux wireless for kernels 2.6.35.
+ */
+
+#include <linux/compat.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
+#include <linux/ctype.h>
+
+/**
+ * hex_to_bin - convert a hex digit to its real value
+ * @ch: ascii character represents hex digit
+ *
+ * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad
+ * input.
+ */
+int hex_to_bin(char ch)
+{
+	if ((ch >= '0') && (ch <= '9'))
+		return ch - '0';
+	ch = tolower(ch);
+	if ((ch >= 'a') && (ch <= 'f'))
+		return ch - 'a' + 10;
+	return -1;
+}
+EXPORT_SYMBOL(hex_to_bin);
+
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35) */
diff --git a/include/linux/compat-2.6.35.h b/include/linux/compat-2.6.35.h
index c6e7136c0526..f0562cd76006 100644
--- a/include/linux/compat-2.6.35.h
+++ b/include/linux/compat-2.6.35.h
@@ -25,6 +25,8 @@ static inline wait_queue_head_t *sk_sleep(struct sock *sk)
 
 #define sdio_writeb_readb(func, write_byte, addr, err_ret) sdio_readb(func, addr, err_ret)
 
+int hex_to_bin(char ch);
+
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)) */
 
 #endif /* LINUX_26_35_COMPAT_H */
-- 
2.30.2