selinuxfs: remove custom hex_to_bin()

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Eric Paris <eparis@parisplace.org>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 10 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index f46658722c78..48a7d0014b4f 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -749,14 +749,6 @@ out:
         return length;
 }
 
-static inline int hexcode_to_int(int code) {
-        if (code == '\0' || !isxdigit(code))
-                return -1;
-        if (isdigit(code))
-                return code - '0';
-        return tolower(code) - 'a' + 10;
-}
-
 static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
 {
         char *scon = NULL, *tcon = NULL;
@@ -808,9 +800,11 @@ static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
                         if (c1 == '+')
                                 c1 = ' ';
                         else if (c1 == '%') {
-                                if ((c1 = hexcode_to_int(*r++)) < 0)
+                                c1 = hex_to_bin(*r++);
+                                if (c1 < 0)
                                         goto out;
-                                if ((c2 = hexcode_to_int(*r++)) < 0)
+                                c2 = hex_to_bin(*r++);
+                                if (c2 < 0)
                                         goto out;
                                 c1 = (c1 << 4) | c2;
                         }