net: filter: rename sk_chk_filter() -> bpf_check_classic()

trivial rename to indicate that this functions performs classic BPF checking

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 565743d..f4a77d2 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -87,7 +87,7 @@
  *	@filter: filter to verify
  *	@flen: length of filter
  *
- * Takes a previously checked filter (by sk_chk_filter) and
+ * Takes a previously checked filter (by bpf_check_classic) and
  * redirects all filter code that loads struct sk_buff data
  * and related data through seccomp_bpf_load.  It also
  * enforces length and alignment checking of those loads.
@@ -239,7 +239,7 @@
 		goto free_prog;
 
 	/* Check and rewrite the fprog via the skb checker */
-	ret = sk_chk_filter(fp, fprog->len);
+	ret = bpf_check_classic(fp, fprog->len);
 	if (ret)
 		goto free_prog;