diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index 60112bc..14f0c88 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -64,7 +64,7 @@
 {
 	unsigned long ticks = ntohs(get_unaligned((__be16 *)src));
 
-	return (ticks * HZ + STP_HZ - 1) / STP_HZ;
+	return DIV_ROUND_UP(ticks * HZ, STP_HZ);
 }
 
 /* called under bridge lock */
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
index 3f8984b..83378f3 100644
--- a/net/dccp/ackvec.c
+++ b/net/dccp/ackvec.c
@@ -69,9 +69,8 @@
 	struct dccp_sock *dp = dccp_sk(sk);
 	struct dccp_ackvec *av = dp->dccps_hc_rx_ackvec;
 	/* Figure out how many options do we need to represent the ackvec */
-	const u16 nr_opts = (av->dccpav_vec_len +
-			     DCCP_MAX_ACKVEC_OPT_LEN - 1) /
-			    DCCP_MAX_ACKVEC_OPT_LEN;
+	const u16 nr_opts = DIV_ROUND_UP(av->dccpav_vec_len,
+					 DCCP_MAX_ACKVEC_OPT_LEN);
 	u16 len = av->dccpav_vec_len + 2 * nr_opts, i;
 	u32 elapsed_time;
 	const unsigned char *tail, *from;
diff --git a/net/ieee80211/ieee80211_crypt_ccmp.c b/net/ieee80211/ieee80211_crypt_ccmp.c
index b016b41..2e6b099 100644
--- a/net/ieee80211/ieee80211_crypt_ccmp.c
+++ b/net/ieee80211/ieee80211_crypt_ccmp.c
@@ -9,6 +9,7 @@
  * more details.
  */
 
+#include <linux/kernel.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -241,7 +242,7 @@
 	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 	ccmp_init_blocks(key->tfm, hdr, key->tx_pn, data_len, b0, b, s0);
 
-	blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN;
+	blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
 	last = data_len % AES_BLOCK_LEN;
 
 	for (i = 1; i <= blocks; i++) {
@@ -351,7 +352,7 @@
 	ccmp_init_blocks(key->tfm, hdr, pn, data_len, b0, a, b);
 	xor_block(mic, b, CCMP_MIC_LEN);
 
-	blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN;
+	blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
 	last = data_len % AES_BLOCK_LEN;
 
 	for (i = 1; i <= blocks; i++) {
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index def007e..686ddd6 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -11,6 +11,7 @@
  *      2 of the License, or (at your option) any later version.
  */
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/fcntl.h>
@@ -112,7 +113,7 @@
 	}
 #endif
 
-#define EXPIRES_IN_MS(tmo)  ((tmo - jiffies) * 1000 + HZ - 1) / HZ
+#define EXPIRES_IN_MS(tmo)  DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
 
 	if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
 		r->idiag_timer = 1;
@@ -190,7 +191,7 @@
 	r->id.idiag_dst[0]    = tw->tw_daddr;
 	r->idiag_state	      = tw->tw_substate;
 	r->idiag_timer	      = 3;
-	r->idiag_expires      = (tmo * 1000 + HZ - 1) / HZ;
+	r->idiag_expires      = DIV_ROUND_UP(tmo * 1000, HZ);
 	r->idiag_rqueue	      = 0;
 	r->idiag_wqueue	      = 0;
 	r->idiag_uid	      = 0;
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 2586df0..4e189e2 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -8,7 +8,7 @@
  *		From code orinally in TCP
  */
 
-
+#include <linux/kernel.h>
 #include <net/inet_hashtables.h>
 #include <net/inet_timewait_sock.h>
 #include <net/ip.h>
@@ -292,7 +292,7 @@
 		if (timeo >= timewait_len) {
 			slot = INET_TWDR_TWKILL_SLOTS - 1;
 		} else {
-			slot = (timeo + twdr->period - 1) / twdr->period;
+			slot = DIV_ROUND_UP(timeo, twdr->period);
 			if (slot >= INET_TWDR_TWKILL_SLOTS)
 				slot = INET_TWDR_TWKILL_SLOTS - 1;
 		}
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index aff3142..18c64c7 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -247,6 +247,7 @@
  *	TCP_CLOSE		socket is finished
  */
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/fcntl.h>
@@ -2210,7 +2211,7 @@
 			goto out;
 
 		mss = skb_shinfo(skb)->gso_size;
-		skb_shinfo(skb)->gso_segs = (skb->len + mss - 1) / mss;
+		skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss);
 
 		segs = NULL;
 		goto out;
diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
index e55569b..bf7ba12 100644
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c
@@ -7,6 +7,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/crypto.h>
 #include <linux/err.h>
@@ -63,7 +64,7 @@
 	s_0 = scratch + AES_BLOCK_LEN;
 	e = scratch + 2 * AES_BLOCK_LEN;
 
-	num_blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN;
+	num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
 	last_len = data_len % AES_BLOCK_LEN;
 	aes_ccm_prepare(tfm, b_0, aad, b, s_0, b);
 
@@ -102,7 +103,7 @@
 	s_0 = scratch + AES_BLOCK_LEN;
 	a = scratch + 2 * AES_BLOCK_LEN;
 
-	num_blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN;
+	num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
 	last_len = data_len % AES_BLOCK_LEN;
 	aes_ccm_prepare(tfm, b_0, aad, b, s_0, a);
 
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 4571668..4ab2928 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -476,7 +476,7 @@
 	hdrlen = ieee80211_get_hdrlen(tx->fc);
 	payload_len = first->len - hdrlen;
 	per_fragm = frag_threshold - hdrlen - FCS_LEN;
-	num_fragm = (payload_len + per_fragm - 1) / per_fragm;
+	num_fragm = DIV_ROUND_UP(payload_len, per_fragm);
 
 	frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC);
 	if (!frags)
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 036ab52..406b3e6 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -19,6 +19,7 @@
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
+#include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/errno.h>
 #include <linux/fcntl.h>
@@ -877,7 +878,7 @@
 	} else {
 		rqstp->rq_arg.page_len = len - rqstp->rq_arg.head[0].iov_len;
 		rqstp->rq_respages = rqstp->rq_pages + 1 +
-			(rqstp->rq_arg.page_len + PAGE_SIZE - 1)/ PAGE_SIZE;
+			DIV_ROUND_UP(rqstp->rq_arg.page_len, PAGE_SIZE);
 	}
 
 	if (serv->sv_stats)