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Date: Thu, 13 Nov 2008 21:17:25 -0800
From: Harvey Harrison <harvey.harrison@...il.com>
To: David Miller <davem@...emloft.net>
Cc: linux-netdev <netdev@...r.kernel.org>, Karsten Keil <kkeil@...e.de>
Subject: [PATCH] isdn: use %pI4, remove get_{u8/u16/u32} and
put_{u8/u16/u32} inlines
They would have been better named as get_be16, put_be16, etc.
as they were hiding an endian shift inside.
They don't add much over explicitly coding the byteshifting
and gcc sometimes has a problem with builtin_constant_p inside
inline functions, so it may do a better job of byteswapping
at compile time rather than runtime.
Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
Dave, this started as a trivial use %pI4 patch, but I took a quick
look at the sparse warnings for this file and saw all the ones from
isdn_net.h and they were only a handlfull of users of the inlines,
so I zapped them as well, let me know if you want a split patch, but
I didn't think it was worth it.
drivers/isdn/i4l/isdn_net.c | 91 ++++++++++++++++++++++---------------------
drivers/isdn/i4l/isdn_net.h | 43 --------------------
2 files changed, 46 insertions(+), 88 deletions(-)
diff --git a/drivers/isdn/i4l/isdn_net.c b/drivers/isdn/i4l/isdn_net.c
index 60c82d7..8fff0bd 100644
--- a/drivers/isdn/i4l/isdn_net.c
+++ b/drivers/isdn/i4l/isdn_net.c
@@ -890,15 +890,15 @@ isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
proto = ETH_P_IP;
switch (lp->p_encap) {
case ISDN_NET_ENCAP_IPTYP:
- proto = ntohs(*(unsigned short *) &buf[0]);
+ proto = ntohs(*(__be16 *)&buf[0]);
p = &buf[2];
break;
case ISDN_NET_ENCAP_ETHER:
- proto = ntohs(*(unsigned short *) &buf[12]);
+ proto = ntohs(*(__be16 *)&buf[12]);
p = &buf[14];
break;
case ISDN_NET_ENCAP_CISCOHDLC:
- proto = ntohs(*(unsigned short *) &buf[2]);
+ proto = ntohs(*(__be16 *)&buf[2]);
p = &buf[4];
break;
#ifdef CONFIG_ISDN_PPP
@@ -942,18 +942,12 @@ isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
strcpy(addinfo, " IDP");
break;
}
- printk(KERN_INFO
- "OPEN: %d.%d.%d.%d -> %d.%d.%d.%d%s\n",
-
- p[12], p[13], p[14], p[15],
- p[16], p[17], p[18], p[19],
- addinfo);
+ printk(KERN_INFO "OPEN: %pI4 -> %pI4%s\n",
+ p + 12, p + 16, addinfo);
break;
case ETH_P_ARP:
- printk(KERN_INFO
- "OPEN: ARP %d.%d.%d.%d -> *.*.*.* ?%d.%d.%d.%d\n",
- p[14], p[15], p[16], p[17],
- p[24], p[25], p[26], p[27]);
+ printk(KERN_INFO "OPEN: ARP %pI4 -> *.*.*.* ?%pI4\n",
+ p + 14, p + 24);
break;
}
}
@@ -1539,15 +1533,16 @@ isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
p = skb_put(skb, 4 + 14);
/* cisco header */
- p += put_u8 (p, CISCO_ADDR_UNICAST);
- p += put_u8 (p, CISCO_CTRL);
- p += put_u16(p, CISCO_TYPE_SLARP);
+ *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
+ *(u8 *)(p + 1) = CISCO_CTRL;
+ *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
/* slarp keepalive */
- p += put_u32(p, CISCO_SLARP_KEEPALIVE);
- p += put_u32(p, lp->cisco_myseq);
- p += put_u32(p, lp->cisco_yourseq);
- p += put_u16(p, 0xffff); // reliablity, always 0xffff
+ *(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_KEEPALIVE);
+ *(__be32 *)(p + 8) = cpu_to_be32(lp->cisco_myseq);
+ *(__be32 *)(p + 12) = cpu_to_be32(lp->cisco_yourseq);
+ *(__be16 *)(p + 16) = cpu_to_be16(0xffff); // reliablity, always 0xffff
+ p += 18;
isdn_net_write_super(lp, skb);
@@ -1569,15 +1564,16 @@ isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
p = skb_put(skb, 4 + 14);
/* cisco header */
- p += put_u8 (p, CISCO_ADDR_UNICAST);
- p += put_u8 (p, CISCO_CTRL);
- p += put_u16(p, CISCO_TYPE_SLARP);
+ *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
+ *(u8 *)(p + 1) = CISCO_CTRL;
+ *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
/* slarp request */
- p += put_u32(p, CISCO_SLARP_REQUEST);
- p += put_u32(p, 0); // address
- p += put_u32(p, 0); // netmask
- p += put_u16(p, 0); // unused
+ *(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_REQUEST);
+ *(__be32 *)(p + 8) = cpu_to_be32(0); // address
+ *(__be32 *)(p + 12) = cpu_to_be32(0); // netmask
+ *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
+ p += 18;
isdn_net_write_super(lp, skb);
}
@@ -1634,16 +1630,17 @@ isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
p = skb_put(skb, 4 + 14);
/* cisco header */
- p += put_u8 (p, CISCO_ADDR_UNICAST);
- p += put_u8 (p, CISCO_CTRL);
- p += put_u16(p, CISCO_TYPE_SLARP);
+ *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
+ *(u8 *)(p + 1) = CISCO_CTRL;
+ *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
/* slarp reply, send own ip/netmask; if values are nonsense remote
* should think we are unable to provide it with an address via SLARP */
- p += put_u32(p, CISCO_SLARP_REPLY);
- p += put_u32(p, addr); // address
- p += put_u32(p, mask); // netmask
- p += put_u16(p, 0); // unused
+ *(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_REPLY);
+ *(__be32 *)(p + 8) = cpu_to_be32(addr); // address
+ *(__be32 *)(p + 12) = cpu_to_be32(mask); // netmask
+ *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
+ p += 18;
isdn_net_write_super(lp, skb);
}
@@ -1664,8 +1661,9 @@ isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
return;
p = skb->data;
- p += get_u32(p, &code);
-
+ code = be32_to_cpup((__be32 *)p);
+ p += 4;
+
switch (code) {
case CISCO_SLARP_REQUEST:
lp->cisco_yourseq = 0;
@@ -1699,9 +1697,10 @@ isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
lp->cisco_keepalive_period);
}
lp->cisco_last_slarp_in = jiffies;
- p += get_u32(p, &my_seq);
- p += get_u32(p, &your_seq);
- p += get_u16(p, &unused);
+ my_seq = be32_to_cpup((__be32 *)(p + 0));
+ your_seq = be32_to_cpup((__be32 *)(p + 4));
+ unused = be16_to_cpup((__be16 *)(p + 8));
+ p += 10;
lp->cisco_yourseq = my_seq;
lp->cisco_mineseen = your_seq;
break;
@@ -1720,9 +1719,10 @@ isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
goto out_free;
p = skb->data;
- p += get_u8 (p, &addr);
- p += get_u8 (p, &ctrl);
- p += get_u16(p, &type);
+ addr = *(u8 *)(p + 0);
+ ctrl = *(u8 *)(p + 1);
+ type = be16_to_cpup((__be16 *)(p + 2));
+ p += 4;
skb_pull(skb, 4);
if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
@@ -1910,9 +1910,10 @@ static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
case ISDN_NET_ENCAP_CISCOHDLC:
case ISDN_NET_ENCAP_CISCOHDLCK:
p = skb_push(skb, 4);
- p += put_u8 (p, CISCO_ADDR_UNICAST);
- p += put_u8 (p, CISCO_CTRL);
- p += put_u16(p, type);
+ *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
+ *(u8 *)(p + 1) = CISCO_CTRL;
+ *(__be16 *)(p + 2) = cpu_to_be16(type);
+ p += 4;
len = 4;
break;
#ifdef CONFIG_ISDN_X25
diff --git a/drivers/isdn/i4l/isdn_net.h b/drivers/isdn/i4l/isdn_net.h
index be49497..2a6c370 100644
--- a/drivers/isdn/i4l/isdn_net.h
+++ b/drivers/isdn/i4l/isdn_net.h
@@ -145,46 +145,3 @@ static __inline__ void isdn_net_rm_from_bundle(isdn_net_local *lp)
spin_unlock_irqrestore(&master_lp->netdev->queue_lock, flags);
}
-static inline int
-put_u8(unsigned char *p, u8 x)
-{
- *p = x;
- return 1;
-}
-
-static inline int
-put_u16(unsigned char *p, u16 x)
-{
- *((u16 *)p) = htons(x);
- return 2;
-}
-
-static inline int
-put_u32(unsigned char *p, u32 x)
-{
- *((u32 *)p) = htonl(x);
- return 4;
-}
-
-static inline int
-get_u8(unsigned char *p, u8 *x)
-{
- *x = *p;
- return 1;
-}
-
-static inline int
-get_u16(unsigned char *p, u16 *x)
-{
- *x = ntohs(*((u16 *)p));
- return 2;
-}
-
-static inline int
-get_u32(unsigned char *p, u32 *x)
-{
- *x = ntohl(*((u32 *)p));
- return 4;
-}
-
-
--
1.6.0.4.879.g9d19a
--
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