net: Remove casts to same type

Adding casts of objects to the same type is unnecessary
and confusing for a human reader.

For example, this cast:

	int y;
	int *p = (int *)&y;

I used the coccinelle script below to find and remove these
unnecessary casts.  I manually removed the conversions this
script produces of casts with __force and __user.

@@
type T;
T *p;
@@

-	(T *)p
+	p

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 5 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 0f661745df0f..71ac6559e0c6 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -592,7 +592,7 @@ static void init_prb_bdqc(struct packet_sock *po,
         p1->knxt_seq_num = 1;
         p1->pkbdq = pg_vec;
         pbd = (struct tpacket_block_desc *)pg_vec[0].buffer;
-        p1->pkblk_start = (char *)pg_vec[0].buffer;
+        p1->pkblk_start = pg_vec[0].buffer;
         p1->kblk_size = req_u->req3.tp_block_size;
         p1->knum_blocks = req_u->req3.tp_block_nr;
         p1->hdrlen = po->tp_hdrlen;
@@ -824,8 +824,7 @@ static void prb_open_block(struct tpacket_kbdq_core *pkc1,
                 h1->ts_first_pkt.ts_sec = ts.tv_sec;
                 h1->ts_first_pkt.ts_nsec = ts.tv_nsec;
                 pkc1->pkblk_start = (char *)pbd1;
-                pkc1->nxt_offset = (char *)(pkc1->pkblk_start +
-                BLK_PLUS_PRIV(pkc1->blk_sizeof_priv));
+                pkc1->nxt_offset = pkc1->pkblk_start + BLK_PLUS_PRIV(pkc1->blk_sizeof_priv);
                 BLOCK_O2FP(pbd1) = (__u32)BLK_PLUS_PRIV(pkc1->blk_sizeof_priv);
                 BLOCK_O2PRIV(pbd1) = BLK_HDR_LEN;
                 pbd1->version = pkc1->version;
@@ -1018,7 +1017,7 @@ static void *__packet_lookup_frame_in_block(struct packet_sock *po,
         struct tpacket_block_desc *pbd;
         char *curr, *end;
 
-        pkc = GET_PBDQC_FROM_RB(((struct packet_ring_buffer *)&po->rx_ring));
+        pkc = GET_PBDQC_FROM_RB(&po->rx_ring);
         pbd = GET_CURR_PBLOCK_DESC_FROM_CORE(pkc);
 
         /* Queue is frozen when user space is lagging behind */
@@ -1044,7 +1043,7 @@ static void *__packet_lookup_frame_in_block(struct packet_sock *po,
         smp_mb();
         curr = pkc->nxt_offset;
         pkc->skb = skb;
-        end = (char *) ((char *)pbd + pkc->kblk_size);
+        end = (char *)pbd + pkc->kblk_size;
 
         /* first try the current block */
         if (curr+TOTAL_PKT_LEN_INCL_ALIGN(len) < end) {