[IPSEC]: Use ALIGN macro in ESP

This patch uses the macro ALIGN in all the applicable spots for ESP.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 5 deletions

diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 1b5a09d1b90b..e911c6dd8296 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -5,6 +5,7 @@
 #include <net/esp.h>
 #include <asm/scatterlist.h>
 #include <linux/crypto.h>
+#include <linux/kernel.h>
 #include <linux/pfkeyv2.h>
 #include <linux/random.h>
 #include <net/icmp.h>
@@ -42,10 +43,10 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
         esp = x->data;
         alen = esp->auth.icv_trunc_len;
         tfm = esp->conf.tfm;
-        blksize = (crypto_tfm_alg_blocksize(tfm) + 3) & ~3;
-        clen = (clen + 2 + blksize-1)&~(blksize-1);
+        blksize = ALIGN(crypto_tfm_alg_blocksize(tfm), 4);
+        clen = ALIGN(clen + 2, blksize);
         if (esp->conf.padlen)
-                clen = (clen + esp->conf.padlen-1)&~(esp->conf.padlen-1);
+                clen = ALIGN(clen, esp->conf.padlen);
 
         if ((nfrags = skb_cow_data(skb, clen-skb->len+alen, &trailer)) < 0)
                 goto error;
@@ -307,13 +308,13 @@ static u32 esp4_get_max_size(struct xfrm_state *x, int mtu)
         u32 blksize = crypto_tfm_alg_blocksize(esp->conf.tfm);
 
         if (x->props.mode) {
-                mtu = (mtu + 2 + blksize-1)&~(blksize-1);
+                mtu = ALIGN(mtu + 2, blksize);
         } else {
                 /* The worst case. */
                 mtu += 2 + blksize;
         }
         if (esp->conf.padlen)
-                mtu = (mtu + esp->conf.padlen-1)&~(esp->conf.padlen-1);
+                mtu = ALIGN(mtu, esp->conf.padlen);
 
         return mtu + x->props.header_len + esp->auth.icv_trunc_len;
 }