[PATCH 07/11] sysctl: don't use own implementation of hex_to_bin()

[Andy Shevchenko]

From: Andy Shevchenko <ext-andriy.shevchenko@xxxxxxxxx>

Get rid of own implementation of hex_to_bin(). It requires to have hex_to_bin()
introduced by starter patch in the series.

Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@xxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
 kernel/sysctl_binary.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
index 8f5d16e..e09c852 100644
--- a/kernel/sysctl_binary.c
+++ b/kernel/sysctl_binary.c
@@ -13,6 +13,7 @@
 #include <linux/file.h>
 #include <linux/ctype.h>
 #include <linux/netdevice.h>
+#include <linux/kernel.h>
 
 #ifdef CONFIG_SYSCTL_SYSCALL
 
@@ -1124,11 +1125,6 @@ out:
 	return result;
 }
 
-static unsigned hex_value(int ch)
-{
-	return isdigit(ch) ? ch - '0' : ((ch | 0x20) - 'a') + 10;
-}
-
 static ssize_t bin_uuid(struct file *file,
 	void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
 {
@@ -1156,7 +1152,8 @@ static ssize_t bin_uuid(struct file *file,
 			if (!isxdigit(str[0]) || !isxdigit(str[1]))
 				goto out;
 
-			uuid[i] = (hex_value(str[0]) << 4) | hex_value(str[1]);
+			uuid[i] = (hex_to_bin(str[0]) << 4) |
+					hex_to_bin(str[1]);
 			str += 2;
 			if (*str == '-')
 				str++;
-- 
1.5.6.5

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