{
        int rv;
 
-       if (synth == NULL)
+       if (!synth)
                rv = sprintf(buf, "%s\n", "none");
        else
                rv = sprintf(buf, "%s\n", synth->name);
        unsigned long flags;
 
        p_header = spk_var_header_by_name(attr->attr.name);
-       if (p_header == NULL) {
+       if (!p_header) {
                pr_warn("p_header is null, attr->attr.name is %s\n",
                        attr->attr.name);
                return -EINVAL;
        }
 
        var = spk_get_punc_var(p_header->var_id);
-       if (var == NULL) {
+       if (!var) {
                pr_warn("var is null, p_header->var_id is %i\n",
                                p_header->var_id);
                return -EINVAL;
                return -EINVAL;
 
        p_header = spk_var_header_by_name(attr->attr.name);
-       if (p_header == NULL) {
+       if (!p_header) {
                pr_warn("p_header is null, attr->attr.name is %s\n",
                        attr->attr.name);
                return -EINVAL;
        }
 
        var = spk_get_punc_var(p_header->var_id);
-       if (var == NULL) {
+       if (!var) {
                pr_warn("var is null, p_header->var_id is %i\n",
                                p_header->var_id);
                return -EINVAL;
        unsigned long flags;
 
        param = spk_var_header_by_name(attr->attr.name);
-       if (param == NULL)
+       if (!param)
                return -EINVAL;
 
        spin_lock_irqsave(&speakup_info.spinlock, flags);
        unsigned long flags;
 
        param = spk_var_header_by_name(attr->attr.name);
-       if (param == NULL)
+       if (!param)
                return -EINVAL;
-       if (param->data == NULL)
+       if (!param->data)
                return 0;
        ret = 0;
        cp = (char *)buf;