[IPV6] xfrm6_tunnel: Delete debugging code.

It doesn't compile, and it's dubious in several regards:

1) is enabled by non-Kconfig controlled CONFIG_* value
   (noted by Randy Dunlap)
2) XFRM6_TUNNEL_SPI_MAGIC is defined after it's first use
3) the debugging messages print object pointer addresses
   which have no meaning without context

So let's just get rid of it.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/xfrm6_tunnel.c

@@ -31,27 +31,6 @@
 #include <linux/icmpv6.h>
 #include <linux/mutex.h>
 
-#ifdef CONFIG_IPV6_XFRM6_TUNNEL_DEBUG
-# define X6TDEBUG	3
-#else
-# define X6TDEBUG	1
-#endif
-
-#define X6TPRINTK(fmt, args...)		printk(fmt, ## args)
-#define X6TNOPRINTK(fmt, args...)	do { ; } while(0)
-
-#if X6TDEBUG >= 1
-# define X6TPRINTK1	X6TPRINTK
-#else
-# define X6TPRINTK1	X6TNOPRINTK
-#endif
-
-#if X6TDEBUG >= 3
-# define X6TPRINTK3	X6TPRINTK
-#else
-# define X6TPRINTK3	X6TNOPRINTK
-#endif
-
 /*
  * xfrm_tunnel_spi things are for allocating unique id ("spi") 
  * per xfrm_address_t.
@@ -62,15 +41,8 @@ struct xfrm6_tunnel_spi {
 	xfrm_address_t addr;
 	u32 spi;
 	atomic_t refcnt;
-#ifdef XFRM6_TUNNEL_SPI_MAGIC
-	u32 magic;
-#endif
 };
 
-#ifdef CONFIG_IPV6_XFRM6_TUNNEL_DEBUG
-# define XFRM6_TUNNEL_SPI_MAGIC 0xdeadbeef
-#endif
-
 static DEFINE_RWLOCK(xfrm6_tunnel_spi_lock);
 
 static u32 xfrm6_tunnel_spi;
@@ -86,43 +58,15 @@ static kmem_cache_t *xfrm6_tunnel_spi_kmem __read_mostly;
 static struct hlist_head xfrm6_tunnel_spi_byaddr[XFRM6_TUNNEL_SPI_BYADDR_HSIZE];
 static struct hlist_head xfrm6_tunnel_spi_byspi[XFRM6_TUNNEL_SPI_BYSPI_HSIZE];
 
-#ifdef XFRM6_TUNNEL_SPI_MAGIC
-static int x6spi_check_magic(const struct xfrm6_tunnel_spi *x6spi,
-			     const char *name)
-{
-	if (unlikely(x6spi->magic != XFRM6_TUNNEL_SPI_MAGIC)) {
-		X6TPRINTK3(KERN_DEBUG "%s(): x6spi object "
-				      "at %p has corrupted magic %08x "
-				      "(should be %08x)\n",
-			   name, x6spi, x6spi->magic, XFRM6_TUNNEL_SPI_MAGIC);
-		return -1;
-	}
-	return 0;
-}
-#else
-static int inline x6spi_check_magic(const struct xfrm6_tunnel_spi *x6spi,
-				    const char *name)
-{
-	return 0;
-}
-#endif
-
-#define X6SPI_CHECK_MAGIC(x6spi) x6spi_check_magic((x6spi), __FUNCTION__)
-
-
 static unsigned inline xfrm6_tunnel_spi_hash_byaddr(xfrm_address_t *addr)
 {
 	unsigned h;
 
-	X6TPRINTK3(KERN_DEBUG "%s(addr=%p)\n", __FUNCTION__, addr);
-
 	h = addr->a6[0] ^ addr->a6[1] ^ addr->a6[2] ^ addr->a6[3];
 	h ^= h >> 16;
 	h ^= h >> 8;
 	h &= XFRM6_TUNNEL_SPI_BYADDR_HSIZE - 1;
 
-	X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, h);
-
 	return h;
 }
 
@@ -136,19 +80,13 @@ static int xfrm6_tunnel_spi_init(void)
 {
 	int i;
 
-	X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
 	xfrm6_tunnel_spi = 0;
 	xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi",
 						  sizeof(struct xfrm6_tunnel_spi),
 						  0, SLAB_HWCACHE_ALIGN,
 						  NULL, NULL);
-	if (!xfrm6_tunnel_spi_kmem) {
-		X6TPRINTK1(KERN_ERR
-			   "%s(): failed to allocate xfrm6_tunnel_spi_kmem\n",
-		           __FUNCTION__);
+	if (!xfrm6_tunnel_spi_kmem)
 		return -ENOMEM;
-	}
 
 	for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++)
 		INIT_HLIST_HEAD(&xfrm6_tunnel_spi_byaddr[i]);
@@ -161,22 +99,16 @@ static void xfrm6_tunnel_spi_fini(void)
 {
 	int i;
 
-	X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
 	for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++) {
 		if (!hlist_empty(&xfrm6_tunnel_spi_byaddr[i]))
-			goto err;
+			return;
 	}
 	for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++) {
 		if (!hlist_empty(&xfrm6_tunnel_spi_byspi[i]))
-			goto err;
+			return;
 	}
 	kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
 	xfrm6_tunnel_spi_kmem = NULL;
-	return;
-err:
-	X6TPRINTK1(KERN_ERR "%s(): table is not empty\n", __FUNCTION__);
-	return;
 }
 
 static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr)
@@ -184,19 +116,13 @@ static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr)
 	struct xfrm6_tunnel_spi *x6spi;
 	struct hlist_node *pos;
 
-	X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
 	hlist_for_each_entry(x6spi, pos,
 			     &xfrm6_tunnel_spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
 			     list_byaddr) {
-		if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) {
-			X6SPI_CHECK_MAGIC(x6spi);
-			X6TPRINTK3(KERN_DEBUG "%s() = %p(%u)\n", __FUNCTION__, x6spi, x6spi->spi);
+		if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0)
 			return x6spi;
-		}
 	}
 
-	X6TPRINTK3(KERN_DEBUG "%s() = NULL(0)\n", __FUNCTION__);
 	return NULL;
 }
 
@@ -205,8 +131,6 @@ u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr)
 	struct xfrm6_tunnel_spi *x6spi;
 	u32 spi;
 
-	X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
 	read_lock_bh(&xfrm6_tunnel_spi_lock);
 	x6spi = __xfrm6_tunnel_spi_lookup(saddr);
 	spi = x6spi ? x6spi->spi : 0;
@@ -223,8 +147,6 @@ static u32 __xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr)
 	struct hlist_node *pos;
 	unsigned index;
 
-	X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
 	if (xfrm6_tunnel_spi < XFRM6_TUNNEL_SPI_MIN ||
 	    xfrm6_tunnel_spi >= XFRM6_TUNNEL_SPI_MAX)
 		xfrm6_tunnel_spi = XFRM6_TUNNEL_SPI_MIN;
@@ -258,18 +180,10 @@ try_next_2:;
 	spi = 0;
 	goto out;
 alloc_spi:
-	X6TPRINTK3(KERN_DEBUG "%s(): allocate new spi for " NIP6_FMT "\n",
-			      __FUNCTION__, 
-			      NIP6(*(struct in6_addr *)saddr));
 	x6spi = kmem_cache_alloc(xfrm6_tunnel_spi_kmem, SLAB_ATOMIC);
-	if (!x6spi) {
-		X6TPRINTK1(KERN_ERR "%s(): kmem_cache_alloc() failed\n", 
-			   __FUNCTION__);
+	if (!x6spi)
 		goto out;
-	}
-#ifdef XFRM6_TUNNEL_SPI_MAGIC
-	x6spi->magic = XFRM6_TUNNEL_SPI_MAGIC;
-#endif
+
 	memcpy(&x6spi->addr, saddr, sizeof(x6spi->addr));
 	x6spi->spi = spi;
 	atomic_set(&x6spi->refcnt, 1);
@@ -278,9 +192,7 @@ try_next_2:;
 
 	index = xfrm6_tunnel_spi_hash_byaddr(saddr);
 	hlist_add_head(&x6spi->list_byaddr, &xfrm6_tunnel_spi_byaddr[index]);
-	X6SPI_CHECK_MAGIC(x6spi);
 out:
-	X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, spi);
 	return spi;
 }
 
@@ -289,8 +201,6 @@ u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr)
 	struct xfrm6_tunnel_spi *x6spi;
 	u32 spi;
 
-	X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
 	write_lock_bh(&xfrm6_tunnel_spi_lock);
 	x6spi = __xfrm6_tunnel_spi_lookup(saddr);
 	if (x6spi) {
@@ -300,8 +210,6 @@ u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr)
 		spi = __xfrm6_tunnel_alloc_spi(saddr);
 	write_unlock_bh(&xfrm6_tunnel_spi_lock);
 
-	X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, spi);
-
 	return spi;
 }
 
@@ -312,8 +220,6 @@ void xfrm6_tunnel_free_spi(xfrm_address_t *saddr)
 	struct xfrm6_tunnel_spi *x6spi;
 	struct hlist_node *pos, *n;
 
-	X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
 	write_lock_bh(&xfrm6_tunnel_spi_lock);
 
 	hlist_for_each_entry_safe(x6spi, pos, n, 
@@ -321,12 +227,6 @@ void xfrm6_tunnel_free_spi(xfrm_address_t *saddr)
 				  list_byaddr)
 	{
 		if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) {
-			X6TPRINTK3(KERN_DEBUG "%s(): x6spi object for " NIP6_FMT 
-					      " found at %p\n",
-				   __FUNCTION__, 
-				   NIP6(*(struct in6_addr *)saddr),
-				   x6spi);
-			X6SPI_CHECK_MAGIC(x6spi);
 			if (atomic_dec_and_test(&x6spi->refcnt)) {
 				hlist_del(&x6spi->list_byaddr);
 				hlist_del(&x6spi->list_byspi);
@@ -377,20 +277,14 @@ static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		case ICMPV6_ADDR_UNREACH:
 		case ICMPV6_PORT_UNREACH:
 		default:
-			X6TPRINTK3(KERN_DEBUG
-				   "xfrm6_tunnel: Destination Unreach.\n");
 			break;
 		}
 		break;
 	case ICMPV6_PKT_TOOBIG:
-			X6TPRINTK3(KERN_DEBUG 
-				   "xfrm6_tunnel: Packet Too Big.\n");
 		break;
 	case ICMPV6_TIME_EXCEED:
 		switch (code) {
 		case ICMPV6_EXC_HOPLIMIT:
-			X6TPRINTK3(KERN_DEBUG
-				   "xfrm6_tunnel: Too small Hoplimit.\n");
 			break;
 		case ICMPV6_EXC_FRAGTIME:
 		default: 
@@ -447,22 +341,14 @@ static struct xfrm6_tunnel xfrm6_tunnel_handler = {
 
 static int __init xfrm6_tunnel_init(void)
 {
-	X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
-	if (xfrm_register_type(&xfrm6_tunnel_type, AF_INET6) < 0) {
-		X6TPRINTK1(KERN_ERR
-			   "xfrm6_tunnel init: can't add xfrm type\n");
+	if (xfrm_register_type(&xfrm6_tunnel_type, AF_INET6) < 0)
 		return -EAGAIN;
-	}
+
 	if (xfrm6_tunnel_register(&xfrm6_tunnel_handler)) {
-		X6TPRINTK1(KERN_ERR
-			   "xfrm6_tunnel init(): can't add handler\n");
 		xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
 		return -EAGAIN;
 	}
 	if (xfrm6_tunnel_spi_init() < 0) {
-		X6TPRINTK1(KERN_ERR
-			   "xfrm6_tunnel init: failed to initialize spi\n");
 		xfrm6_tunnel_deregister(&xfrm6_tunnel_handler);
 		xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
 		return -EAGAIN;
@@ -472,15 +358,9 @@ static int __init xfrm6_tunnel_init(void)
 
 static void __exit xfrm6_tunnel_fini(void)
 {
-	X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
 	xfrm6_tunnel_spi_fini();
-	if (xfrm6_tunnel_deregister(&xfrm6_tunnel_handler))
-		X6TPRINTK1(KERN_ERR 
-			   "xfrm6_tunnel close: can't remove handler\n");
-	if (xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6) < 0)
-		X6TPRINTK1(KERN_ERR
-			   "xfrm6_tunnel close: can't remove xfrm type\n");
+	xfrm6_tunnel_deregister(&xfrm6_tunnel_handler);
+	xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
 }
 
 module_init(xfrm6_tunnel_init);