--- uClinux-dist-orig/linux-2.6.x/arch/blackfin/kernel/setup.c	2010-08-25 16:56:14.402699145 +0930
+++ uClinux-dist/linux-2.6.x/arch/blackfin/kernel/setup.c	2010-08-25 16:51:43.527198906 +0930
@@ -208,10 +208,40 @@
 #endif
 
 #if defined(CONFIG_BOOTPARAM)
+	/*
+
 	memset(command_line, 0, sizeof(command_line));
 	strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING,
 		sizeof(command_line));
 	command_line[sizeof(command_line) - 1] = 0;
+
+	*/
+	{
+	    char *p;
+	    char lhs[80];
+	    char change[80];
+
+	    strncpy(change, CONFIG_BOOTPARAM_STRING, sizeof(command_line));
+
+	    /* extract LHS */
+
+	    p = strchr(change, '=');
+	    if (p) {
+		strcpy(lhs, change);
+		lhs[p-change] = 0;
+
+		/* search for LHS in original command line */
+    
+		p = strstr(command_line, lhs);
+
+		if (p) {
+		    /* replace old RHS - 
+		       this only works if replacement string is the same length */
+
+		    memcpy(p, change, strlen(change));
+		}
+	    }
+	}
 #endif
 
 	/* Keep a copy of command line */