10 files changed, 21 insertions, 16 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index dfeb8b13024f..802c670ba820 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -40,6 +40,7 @@
 #ifndef _SOCK_H
 #define _SOCK_H
 
+#include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/timer.h>
 #include <linux/cache.h>
@@ -702,7 +703,7 @@ extern int sk_stream_mem_schedule(struct sock *sk, int size, int kind);
 
 static inline int sk_stream_pages(int amt)
 {
-        return (amt + SK_STREAM_MEM_QUANTUM - 1) / SK_STREAM_MEM_QUANTUM;
+        return DIV_ROUND_UP(amt, SK_STREAM_MEM_QUANTUM);
 }
 
 static inline void sk_stream_mem_reclaim(struct sock *sk)
diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index 60112bce6698..14f0c888eecc 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -64,7 +64,7 @@ static inline int br_get_ticks(const unsigned char *src)
 {
         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 3f8984b5f6e8..83378f379f72 100644
--- a/net/dccp/ackvec.c
+++ b/net/dccp/ackvec.c
@@ -69,9 +69,8 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
         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 b016b4104de6..2e6b099fc84c 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 @@ static int ieee80211_ccmp_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
         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 @@ static int ieee80211_ccmp_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
         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 def007ec1d6f..686ddd62f71a 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 @@ static int inet_csk_diag_fill(struct sock *sk,
         }
 #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 @@ static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
         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 2586df09b9b6..4e189e28f306 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 @@ void inet_twsk_schedule(struct inet_timewait_sock *tw,
                 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 aff31427f525..18c64c74f6d5 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 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
                         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 e55569bee7d0..bf7ba128b963 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 @@ void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
         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 @@ int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch,
         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 457166889cc7..4ab29282dd67 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -476,7 +476,7 @@ ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
         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 036ab520df21..406b3e687952 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 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
         } 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)