[PATCH] net: Remove unnecessary cast on void pointer

From: simran singhal
Date: Tue Mar 28 2017 - 08:51:25 EST

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The following Coccinelle script was used to detect this:
@r@
expression x;
void* e;
type T;
identifier f;
@@
(
*((T *)e)
|
((T *)x)[...]
|
((T*)x)->f
|

- (T*)
e
)

Signed-off-by: simran singhal <singhalsimran0@xxxxxxxxx>
---
net/bridge/netfilter/ebtables.c | 2 +-
net/ipv4/netfilter/arp_tables.c | 20 ++++++++------------
net/ipv4/netfilter/ip_tables.c | 20 ++++++++------------
net/ipv6/netfilter/ip6_tables.c | 20 ++++++++------------
net/netfilter/ipset/ip_set_bitmap_gen.h | 4 ++--
net/netfilter/ipset/ip_set_core.c | 2 +-
net/netfilter/nf_conntrack_proto.c | 2 +-
net/netfilter/nft_set_hash.c | 2 +-
net/netfilter/xt_hashlimit.c | 10 +++++-----
9 files changed, 35 insertions(+), 47 deletions(-)

diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 79b6991..bdc629e 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1713,7 +1713,7 @@ static int compat_copy_entry_to_user(struct ebt_entry *e, void __user **dstptr,
if (*size < sizeof(*ce))
return -EINVAL;

- ce = (struct ebt_entry __user *)*dstptr;
+ ce = *dstptr;
if (copy_to_user(ce, e, sizeof(*ce)))
return -EFAULT;

diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 6241a81..f046c12 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -310,7 +310,7 @@ static int mark_source_chains(const struct xt_table_info *newinfo,
for (hook = 0; hook < NF_ARP_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
struct arpt_entry *e
- = (struct arpt_entry *)(entry0 + pos);
+ = (entry0 + pos);

if (!(valid_hooks & (1 << hook)))
continue;
@@ -354,14 +354,12 @@ static int mark_source_chains(const struct xt_table_info *newinfo,
if (pos == oldpos)
goto next;

- e = (struct arpt_entry *)
- (entry0 + pos);
+ e = (entry0 + pos);
} while (oldpos == pos + e->next_offset);

/* Move along one */
size = e->next_offset;
- e = (struct arpt_entry *)
- (entry0 + pos + size);
+ e = (entry0 + pos + size);
if (pos + size >= newinfo->size)
return 0;
e->counters.pcnt = pos;
@@ -376,16 +374,14 @@ static int mark_source_chains(const struct xt_table_info *newinfo,
if (!xt_find_jump_offset(offsets, newpos,
newinfo->number))
return 0;
- e = (struct arpt_entry *)
- (entry0 + newpos);
+ e = (entry0 + newpos);
} else {
/* ... this is a fallthru */
newpos = pos + e->next_offset;
if (newpos >= newinfo->size)
return 0;
}
- e = (struct arpt_entry *)
- (entry0 + newpos);
+ e = (entry0 + newpos);
e->counters.pcnt = pos;
pos = newpos;
}
@@ -683,7 +679,7 @@ static int copy_entries_to_user(unsigned int total_size,
for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
const struct xt_entry_target *t;

- e = (struct arpt_entry *)(loc_cpu_entry + off);
+ e = (loc_cpu_entry + off);
if (copy_to_user(userptr + off, e, sizeof(*e))) {
ret = -EFAULT;
goto free_counters;
@@ -1130,7 +1126,7 @@ compat_copy_entry_from_user(struct compat_arpt_entry *e, void **dstptr,
int h;

origsize = *size;
- de = (struct arpt_entry *)*dstptr;
+ de = *dstptr;
memcpy(de, e, sizeof(struct arpt_entry));
memcpy(&de->counters, &e->counters, sizeof(e->counters));

@@ -1324,7 +1320,7 @@ static int compat_copy_entry_to_user(struct arpt_entry *e, void __user **dstptr,
int ret;

origsize = *size;
- ce = (struct compat_arpt_entry __user *)*dstptr;
+ ce = *dstptr;
if (copy_to_user(ce, e, sizeof(struct arpt_entry)) != 0 ||
copy_to_user(&ce->counters, &counters[i],
sizeof(counters[i])) != 0)
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 384b857..af57eea 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -382,7 +382,7 @@ mark_source_chains(const struct xt_table_info *newinfo,
to 0 as we leave), and comefrom to save source hook bitmask */
for (hook = 0; hook < NF_INET_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
- struct ipt_entry *e = (struct ipt_entry *)(entry0 + pos);
+ struct ipt_entry *e = (entry0 + pos);

if (!(valid_hooks & (1 << hook)))
continue;
@@ -424,14 +424,12 @@ mark_source_chains(const struct xt_table_info *newinfo,
if (pos == oldpos)
goto next;

- e = (struct ipt_entry *)
- (entry0 + pos);
+ e = (entry0 + pos);
} while (oldpos == pos + e->next_offset);

/* Move along one */
size = e->next_offset;
- e = (struct ipt_entry *)
- (entry0 + pos + size);
+ e = (entry0 + pos + size);
if (pos + size >= newinfo->size)
return 0;
e->counters.pcnt = pos;
@@ -446,16 +444,14 @@ mark_source_chains(const struct xt_table_info *newinfo,
if (!xt_find_jump_offset(offsets, newpos,
newinfo->number))
return 0;
- e = (struct ipt_entry *)
- (entry0 + newpos);
+ e = (entry0 + newpos);
} else {
/* ... this is a fallthru */
newpos = pos + e->next_offset;
if (newpos >= newinfo->size)
return 0;
}
- e = (struct ipt_entry *)
- (entry0 + newpos);
+ e = (entry0 + newpos);
e->counters.pcnt = pos;
pos = newpos;
}
@@ -834,7 +830,7 @@ copy_entries_to_user(unsigned int total_size,
const struct xt_entry_match *m;
const struct xt_entry_target *t;

- e = (struct ipt_entry *)(loc_cpu_entry + off);
+ e = (loc_cpu_entry + off);
if (copy_to_user(userptr + off, e, sizeof(*e))) {
ret = -EFAULT;
goto free_counters;
@@ -1229,7 +1225,7 @@ compat_copy_entry_to_user(struct ipt_entry *e, void __user **dstptr,
int ret = 0;

origsize = *size;
- ce = (struct compat_ipt_entry __user *)*dstptr;
+ ce = *dstptr;
if (copy_to_user(ce, e, sizeof(struct ipt_entry)) != 0 ||
copy_to_user(&ce->counters, &counters[i],
sizeof(counters[i])) != 0)
@@ -1366,7 +1362,7 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr,
struct xt_entry_match *ematch;

origsize = *size;
- de = (struct ipt_entry *)*dstptr;
+ de = *dstptr;
memcpy(de, e, sizeof(struct ipt_entry));
memcpy(&de->counters, &e->counters, sizeof(e->counters));

diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 1e15c54..ef730e9 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -411,7 +411,7 @@ mark_source_chains(const struct xt_table_info *newinfo,
to 0 as we leave), and comefrom to save source hook bitmask */
for (hook = 0; hook < NF_INET_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
- struct ip6t_entry *e = (struct ip6t_entry *)(entry0 + pos);
+ struct ip6t_entry *e = (entry0 + pos);

if (!(valid_hooks & (1 << hook)))
continue;
@@ -453,14 +453,12 @@ mark_source_chains(const struct xt_table_info *newinfo,
if (pos == oldpos)
goto next;

- e = (struct ip6t_entry *)
- (entry0 + pos);
+ e = (entry0 + pos);
} while (oldpos == pos + e->next_offset);

/* Move along one */
size = e->next_offset;
- e = (struct ip6t_entry *)
- (entry0 + pos + size);
+ e = (entry0 + pos + size);
if (pos + size >= newinfo->size)
return 0;
e->counters.pcnt = pos;
@@ -475,16 +473,14 @@ mark_source_chains(const struct xt_table_info *newinfo,
if (!xt_find_jump_offset(offsets, newpos,
newinfo->number))
return 0;
- e = (struct ip6t_entry *)
- (entry0 + newpos);
+ e = (entry0 + newpos);
} else {
/* ... this is a fallthru */
newpos = pos + e->next_offset;
if (newpos >= newinfo->size)
return 0;
}
- e = (struct ip6t_entry *)
- (entry0 + newpos);
+ e = (entry0 + newpos);
e->counters.pcnt = pos;
pos = newpos;
}
@@ -863,7 +859,7 @@ copy_entries_to_user(unsigned int total_size,
const struct xt_entry_match *m;
const struct xt_entry_target *t;

- e = (struct ip6t_entry *)(loc_cpu_entry + off);
+ e = (loc_cpu_entry + off);
if (copy_to_user(userptr + off, e, sizeof(*e))) {
ret = -EFAULT;
goto free_counters;
@@ -1258,7 +1254,7 @@ compat_copy_entry_to_user(struct ip6t_entry *e, void __user **dstptr,
int ret = 0;

origsize = *size;
- ce = (struct compat_ip6t_entry __user *)*dstptr;
+ ce = *dstptr;
if (copy_to_user(ce, e, sizeof(struct ip6t_entry)) != 0 ||
copy_to_user(&ce->counters, &counters[i],
sizeof(counters[i])) != 0)
@@ -1394,7 +1390,7 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
struct xt_entry_match *ematch;

origsize = *size;
- de = (struct ip6t_entry *)*dstptr;
+ de = *dstptr;
memcpy(de, e, sizeof(struct ip6t_entry));
memcpy(&de->counters, &e->counters, sizeof(e->counters));

diff --git a/net/netfilter/ipset/ip_set_bitmap_gen.h b/net/netfilter/ipset/ip_set_bitmap_gen.h
index 6f09a99..d302d98 100644
--- a/net/netfilter/ipset/ip_set_bitmap_gen.h
+++ b/net/netfilter/ipset/ip_set_bitmap_gen.h
@@ -232,7 +232,7 @@ mtype_list(const struct ip_set *set,
if (!test_bit(id, map->members) ||
(SET_WITH_TIMEOUT(set) &&
#ifdef IP_SET_BITMAP_STORED_TIMEOUT
- mtype_is_filled((const struct mtype_elem *)x) &&
+ mtype_is_filled(x) &&
#endif
ip_set_timeout_expired(ext_timeout(x, set))))
continue;
@@ -249,7 +249,7 @@ mtype_list(const struct ip_set *set,
if (mtype_do_list(skb, map, id, set->dsize))
goto nla_put_failure;
if (ip_set_put_extensions(skb, set, x,
- mtype_is_filled((const struct mtype_elem *)x)))
+ mtype_is_filled(x)))
goto nla_put_failure;
ipset_nest_end(skb, nested);
}
diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index c296f9b..10a3694 100644
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -1915,7 +1915,7 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len)
ret = -EFAULT;
goto done;
}
- op = (unsigned int *)data;
+ op = data;

if (*op < IP_SET_OP_VERSION) {
/* Check the version at the beginning of operations */
diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
index 48d8354..ec665c8 100644
--- a/net/netfilter/nf_conntrack_proto.c
+++ b/net/netfilter/nf_conntrack_proto.c
@@ -202,7 +202,7 @@ static int kill_l3proto(struct nf_conn *i, void *data)
static int kill_l4proto(struct nf_conn *i, void *data)
{
struct nf_conntrack_l4proto *l4proto;
- l4proto = (struct nf_conntrack_l4proto *)data;
+ l4proto = data;
return nf_ct_protonum(i) == l4proto->l4proto &&
nf_ct_l3num(i) == l4proto->l3proto;
}
diff --git a/net/netfilter/nft_set_hash.c b/net/netfilter/nft_set_hash.c
index 5f65272..8ec086b 100644
--- a/net/netfilter/nft_set_hash.c
+++ b/net/netfilter/nft_set_hash.c
@@ -352,7 +352,7 @@ static int nft_hash_init(const struct nft_set *set,

static void nft_hash_elem_destroy(void *ptr, void *arg)
{
- nft_set_elem_destroy((const struct nft_set *)arg, ptr, true);
+ nft_set_elem_destroy(arg, ptr, true);
}

static void nft_hash_destroy(const struct nft_set *set)
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 2a6dfe8..762e187 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -119,7 +119,7 @@ static int
cfg_copy(struct hashlimit_cfg2 *to, void *from, int revision)
{
if (revision == 1) {
- struct hashlimit_cfg1 *cfg = (struct hashlimit_cfg1 *)from;
+ struct hashlimit_cfg1 *cfg = from;

to->mode = cfg->mode;
to->avg = cfg->avg;
@@ -895,7 +895,7 @@ static void *dl_seq_start(struct seq_file *s, loff_t *pos)
static void *dl_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct xt_hashlimit_htable *htable = s->private;
- unsigned int *bucket = (unsigned int *)v;
+ unsigned int *bucket = v;

*pos = ++(*bucket);
if (*pos >= htable->cfg.size) {
@@ -909,7 +909,7 @@ static void dl_seq_stop(struct seq_file *s, void *v)
__releases(htable->lock)
{
struct xt_hashlimit_htable *htable = s->private;
- unsigned int *bucket = (unsigned int *)v;
+ unsigned int *bucket = v;

if (!IS_ERR(bucket))
kfree(bucket);
@@ -980,7 +980,7 @@ static int dl_seq_real_show(struct dsthash_ent *ent, u_int8_t family,
static int dl_seq_show_v1(struct seq_file *s, void *v)
{
struct xt_hashlimit_htable *htable = s->private;
- unsigned int *bucket = (unsigned int *)v;
+ unsigned int *bucket = v;
struct dsthash_ent *ent;

if (!hlist_empty(&htable->hash[*bucket])) {
@@ -994,7 +994,7 @@ static int dl_seq_show_v1(struct seq_file *s, void *v)
static int dl_seq_show(struct seq_file *s, void *v)
{
struct xt_hashlimit_htable *htable = s->private;
- unsigned int *bucket = (unsigned int *)v;
+ unsigned int *bucket = v;
struct dsthash_ent *ent;

if (!hlist_empty(&htable->hash[*bucket])) {
--
2.7.4

Next message: Peter Zijlstra: "Re: [RESEND PATCH 2/2] sched/fair: Optimize __update_sched_avg()"
Previous message: Greg Kroah-Hartman: "[PATCH 4.10 051/111] usb: hub: Fix crash after failure to read BOS descriptor"
Next in thread: Jan Engelhardt: "Re: [PATCH] net: Remove unnecessary cast on void pointer"
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