diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 25b4442..e9a3094 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -265,13 +265,14 @@
 			ppos);
 }
 
-static size_t proc_skip_spaces(char **buf)
+static void proc_skip_spaces(char **buf, size_t *size)
 {
-	size_t ret;
-	char *tmp = skip_spaces(*buf);
-	ret = tmp - *buf;
-	*buf = tmp;
-	return ret;
+	while (*size) {
+		if (!isspace(**buf))
+			break;
+		(*size)--;
+		(*buf)++;
+	}
 }
 
 static void proc_skip_char(char **buf, size_t *size, const char v)
@@ -518,7 +519,7 @@
 		bool neg;
 
 		if (write) {
-			left -= proc_skip_spaces(&p);
+			proc_skip_spaces(&p, &left);
 
 			if (!left)
 				break;
@@ -545,7 +546,7 @@
 	if (!write && !first && left && !err)
 		proc_put_char(&buffer, &left, '\n');
 	if (write && !err && left)
-		left -= proc_skip_spaces(&p);
+		proc_skip_spaces(&p, &left);
 	if (write && first)
 		return err ? : -EINVAL;
 	*lenp -= left;
@@ -587,7 +588,7 @@
 	if (left > PAGE_SIZE - 1)
 		left = PAGE_SIZE - 1;
 
-	left -= proc_skip_spaces(&p);
+	proc_skip_spaces(&p, &left);
 	if (!left) {
 		err = -EINVAL;
 		goto out_free;
@@ -607,7 +608,7 @@
 	}
 
 	if (!err && left)
-		left -= proc_skip_spaces(&p);
+		proc_skip_spaces(&p, &left);
 
 out_free:
 	if (err)
@@ -1072,7 +1073,7 @@
 		if (write) {
 			bool neg;
 
-			left -= proc_skip_spaces(&p);
+			proc_skip_spaces(&p, &left);
 			if (!left)
 				break;
 
@@ -1101,7 +1102,7 @@
 	if (!write && !first && left && !err)
 		proc_put_char(&buffer, &left, '\n');
 	if (write && !err)
-		left -= proc_skip_spaces(&p);
+		proc_skip_spaces(&p, &left);
 	if (write && first)
 		return err ? : -EINVAL;
 	*lenp -= left;