ARM: at91/dt: Fix sama5d3x typos

[cascardo/linux.git] / lib / cmdline.c

diff --git a/lib/cmdline.c b/lib/cmdline.c
index 76a712e..8f13cf7 100644 (file)
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -160,3 +160,32 @@ unsigned long long memparse(const char *ptr, char **retptr)
        return ret;
 }
 EXPORT_SYMBOL(memparse);
+
+/**
+ *     parse_option_str - Parse a string and check an option is set or not
+ *     @str: String to be parsed
+ *     @option: option name
+ *
+ *     This function parses a string containing a comma-separated list of
+ *     strings like a=b,c.
+ *
+ *     Return true if there's such option in the string, or return false.
+ */
+bool parse_option_str(const char *str, const char *option)
+{
+       while (*str) {
+               if (!strncmp(str, option, strlen(option))) {
+                       str += strlen(option);
+                       if (!*str || *str == ',')
+                               return true;
+               }
+
+               while (*str && *str != ',')
+                       str++;
+
+               if (*str == ',')
+                       str++;
+       }
+
+       return false;
+}