diff --git a/include/net/sock.h b/include/net/sock.h
index dfeb8b13024f8827febf8cedbcee48666106d4b3..802c670ba820bfce47d896216e100ff3ac7cdecd 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 60112bce66984343e8ab13121c1304a1cde29739..14f0c888eecc4f87cb46fe2dd4a379bb501fbc25 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 3f8984b5f6e87168c49eac11101f877073183e1b..83378f379f72c129670fabf8cbe86e06626485b3 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 b016b4104de6d4893ba0dae8546bc7f1347026af..2e6b099fc84ce6b802c147b9f5e24efbfca77c24 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 def007ec1d6f85b3f1f9830554c8a4c0be70a905..686ddd62f71a3976d31ad28663dd0a8e4f8d132f 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 2586df09b9b6cac0bfe2c5679e02d35038d8449e..4e189e28f3062f45f6aeca63476423ca386e757a 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 aff31427f525fb982ea0f86e24597e43d3a440aa..18c64c74f6d50520f5928355a38e54d6272269d4 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 e55569bee7d081c6a827883cbd900784a7e27066..bf7ba128b963a49c949b9e240209978dd691d2ac 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 457166889cc75ef31c645a72ab23c632e111501a..4ab29282dd679c67b40a10b72e34c5538d63337b 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 036ab520df21ec5ecea04342e979fc58762aa059..406b3e6879525c353223aa41ec9c9cba511853bf 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)