netfilter: nf_tables: add NFT_REG32_NUM

Add a definition including the maximum number of 32-bits registers that
are used a scratchpad memory area to store data.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 5a046b0..515e5db 100644 (file)
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -105,6 +105,8 @@ struct nft_data {
        };
 } __attribute__((aligned(__alignof__(u64))));
 
+#define NFT_REG32_NUM          20
+
 /**
  *     struct nft_regs - nf_tables register set
  *
@@ -115,7 +117,7 @@ struct nft_data {
  */
 struct nft_regs {
        union {
-               u32                     data[20];
+               u32                     data[NFT_REG32_NUM];
                struct nft_verdict      verdict;
        };
 };