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authorEric Dumazet <dada1@cosmosbay.com>2008-01-01 21:58:02 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-28 15:00:31 -0800
commit9a429c4983deae020f1e757ecc8f547b6d4e2f2b (patch)
tree172e27a5866e182b902cd77506df1755aafadb60
parentb950dfcf504842a0f2bb142a33ef938f1c00d300 (diff)
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[NET]: Add some acquires/releases sparse annotations.
Add __acquires() and __releases() annotations to suppress some sparse warnings. example of warnings : net/ipv4/udp.c:1555:14: warning: context imbalance in 'udp_seq_start' - wrong count at exit net/ipv4/udp.c:1571:13: warning: context imbalance in 'udp_seq_stop' - unexpected unlock Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/dev.c2
-rw-r--r--net/core/dev_mcast.c2
-rw-r--r--net/core/gen_stats.c1
-rw-r--r--net/core/neighbour.c2
-rw-r--r--net/core/sock.c2
-rw-r--r--net/ipv4/fib_hash.c2
-rw-r--r--net/ipv4/inet_hashtables.c1
-rw-r--r--net/ipv4/udp.c2
-rw-r--r--net/ipv6/anycast.c2
-rw-r--r--net/ipv6/ip6_flowlabel.c2
-rw-r--r--net/ipv6/mcast.c4
-rw-r--r--net/netlink/af_netlink.c4
-rw-r--r--net/sched/sch_generic.c4
-rw-r--r--net/sunrpc/cache.c2
-rw-r--r--net/unix/af_unix.c2
-rw-r--r--net/xfrm/xfrm_state.c2
16 files changed, 36 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 7153e94f50ad..eee774243097 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2368,6 +2368,7 @@ static int dev_ifconf(struct net *net, char __user *arg)
* in detail.
*/
void *dev_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(dev_base_lock)
{
struct net *net = seq_file_net(seq);
loff_t off;
@@ -2394,6 +2395,7 @@ void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
void dev_seq_stop(struct seq_file *seq, void *v)
+ __releases(dev_base_lock)
{
read_unlock(&dev_base_lock);
}
diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
index 63f0b33d7ced..cadbfbf7e7f5 100644
--- a/net/core/dev_mcast.c
+++ b/net/core/dev_mcast.c
@@ -186,6 +186,7 @@ EXPORT_SYMBOL(dev_mc_unsync);
#ifdef CONFIG_PROC_FS
static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(dev_base_lock)
{
struct net *net = seq_file_net(seq);
struct net_device *dev;
@@ -206,6 +207,7 @@ static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void dev_mc_seq_stop(struct seq_file *seq, void *v)
+ __releases(dev_base_lock)
{
read_unlock(&dev_base_lock);
}
diff --git a/net/core/gen_stats.c b/net/core/gen_stats.c
index bcc25591d8ac..8073561f7c63 100644
--- a/net/core/gen_stats.c
+++ b/net/core/gen_stats.c
@@ -55,6 +55,7 @@ rtattr_failure:
int
gnet_stats_start_copy_compat(struct sk_buff *skb, int type, int tc_stats_type,
int xstats_type, spinlock_t *lock, struct gnet_dump *d)
+ __acquires(lock)
{
memset(d, 0, sizeof(*d));
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index bd899d557737..802493327a87 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -2313,6 +2313,7 @@ static void *neigh_get_idx_any(struct seq_file *seq, loff_t *pos)
}
void *neigh_seq_start(struct seq_file *seq, loff_t *pos, struct neigh_table *tbl, unsigned int neigh_seq_flags)
+ __acquires(tbl->lock)
{
struct neigh_seq_state *state = seq->private;
loff_t pos_minus_one;
@@ -2356,6 +2357,7 @@ out:
EXPORT_SYMBOL(neigh_seq_next);
void neigh_seq_stop(struct seq_file *seq, void *v)
+ __releases(tbl->lock)
{
struct neigh_seq_state *state = seq->private;
struct neigh_table *tbl = state->tbl;
diff --git a/net/core/sock.c b/net/core/sock.c
index 3804e7df626b..3d7757ee2fc8 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2025,6 +2025,7 @@ EXPORT_SYMBOL(proto_unregister);
#ifdef CONFIG_PROC_FS
static void *proto_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(proto_list_lock)
{
read_lock(&proto_list_lock);
return seq_list_start_head(&proto_list, *pos);
@@ -2036,6 +2037,7 @@ static void *proto_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void proto_seq_stop(struct seq_file *seq, void *v)
+ __releases(proto_list_lock)
{
read_unlock(&proto_list_lock);
}
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index 9d5404158476..ee1ffdb3044f 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -936,6 +936,7 @@ static struct fib_alias *fib_get_idx(struct seq_file *seq, loff_t pos)
}
static void *fib_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(fib_hash_lock)
{
void *v = NULL;
@@ -952,6 +953,7 @@ static void *fib_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void fib_seq_stop(struct seq_file *seq, void *v)
+ __releases(fib_hash_lock)
{
read_unlock(&fib_hash_lock);
}
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 2e5814a84360..88a059e04e30 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -96,6 +96,7 @@ EXPORT_SYMBOL(inet_put_port);
* exclusive lock release). It should be ifdefed really.
*/
void inet_listen_wlock(struct inet_hashinfo *hashinfo)
+ __acquires(hashinfo->lhash_lock)
{
write_lock(&hashinfo->lhash_lock);
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 353284360751..02fcccd0486e 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1550,6 +1550,7 @@ static struct sock *udp_get_idx(struct seq_file *seq, loff_t pos)
}
static void *udp_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(udp_hash_lock)
{
read_lock(&udp_hash_lock);
return *pos ? udp_get_idx(seq, *pos-1) : (void *)1;
@@ -1569,6 +1570,7 @@ static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void udp_seq_stop(struct seq_file *seq, void *v)
+ __releases(udp_hash_lock)
{
read_unlock(&udp_hash_lock);
}
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index f915c4df9820..5c4190060e75 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -504,6 +504,7 @@ static struct ifacaddr6 *ac6_get_idx(struct seq_file *seq, loff_t pos)
}
static void *ac6_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(dev_base_lock)
{
read_lock(&dev_base_lock);
return ac6_get_idx(seq, *pos);
@@ -518,6 +519,7 @@ static void *ac6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void ac6_seq_stop(struct seq_file *seq, void *v)
+ __releases(dev_base_lock)
{
struct ac6_iter_state *state = ac6_seq_private(seq);
if (likely(state->idev != NULL)) {
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index d0babea89819..2b7d9ee98832 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -629,6 +629,7 @@ static struct ip6_flowlabel *ip6fl_get_idx(struct seq_file *seq, loff_t pos)
}
static void *ip6fl_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(ip6_fl_lock)
{
read_lock_bh(&ip6_fl_lock);
return *pos ? ip6fl_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
@@ -647,6 +648,7 @@ static void *ip6fl_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void ip6fl_seq_stop(struct seq_file *seq, void *v)
+ __releases(ip6_fl_lock)
{
read_unlock_bh(&ip6_fl_lock);
}
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 82b12940c2a0..ab228d1ea114 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -2373,6 +2373,7 @@ static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
}
static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(dev_base_lock)
{
read_lock(&dev_base_lock);
return igmp6_mc_get_idx(seq, *pos);
@@ -2387,6 +2388,7 @@ static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
+ __releases(dev_base_lock)
{
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
if (likely(state->idev != NULL)) {
@@ -2516,6 +2518,7 @@ static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
}
static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(dev_base_lock)
{
read_lock(&dev_base_lock);
return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
@@ -2533,6 +2536,7 @@ static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
+ __releases(dev_base_lock)
{
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
if (likely(state->im != NULL)) {
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index dbd7cad1c9a9..be07f1b45ee2 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -171,6 +171,7 @@ static void netlink_sock_destruct(struct sock *sk)
*/
static void netlink_table_grab(void)
+ __acquires(nl_table_lock)
{
write_lock_irq(&nl_table_lock);
@@ -193,6 +194,7 @@ static void netlink_table_grab(void)
}
static inline void netlink_table_ungrab(void)
+ __releases(nl_table_lock)
{
write_unlock_irq(&nl_table_lock);
wake_up(&nl_table_wait);
@@ -1728,6 +1730,7 @@ static struct sock *netlink_seq_socket_idx(struct seq_file *seq, loff_t pos)
}
static void *netlink_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(nl_table_lock)
{
read_lock(&nl_table_lock);
return *pos ? netlink_seq_socket_idx(seq, *pos - 1) : SEQ_START_TOKEN;
@@ -1776,6 +1779,7 @@ static void *netlink_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void netlink_seq_stop(struct seq_file *seq, void *v)
+ __releases(nl_table_lock)
{
read_unlock(&nl_table_lock);
}
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 9be2f152455a..ea5a05b172c4 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -40,12 +40,16 @@
*/
void qdisc_lock_tree(struct net_device *dev)
+ __acquires(dev->queue_lock)
+ __acquires(dev->ingress_lock)
{
spin_lock_bh(&dev->queue_lock);
spin_lock(&dev->ingress_lock);
}
void qdisc_unlock_tree(struct net_device *dev)
+ __releases(dev->ingress_lock)
+ __releases(dev->queue_lock)
{
spin_unlock(&dev->ingress_lock);
spin_unlock_bh(&dev->queue_lock);
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 8e05557414ce..73f053d0cc7a 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -1127,6 +1127,7 @@ struct handle {
};
static void *c_start(struct seq_file *m, loff_t *pos)
+ __acquires(cd->hash_lock)
{
loff_t n = *pos;
unsigned hash, entry;
@@ -1183,6 +1184,7 @@ static void *c_next(struct seq_file *m, void *p, loff_t *pos)
}
static void c_stop(struct seq_file *m, void *p)
+ __releases(cd->hash_lock)
{
struct cache_detail *cd = ((struct handle*)m->private)->cd;
read_unlock(&cd->hash_lock);
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 63a9239571a4..eea75888805e 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2033,6 +2033,7 @@ static struct sock *unix_seq_idx(struct unix_iter_state *iter, loff_t pos)
static void *unix_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(unix_table_lock)
{
struct unix_iter_state *iter = seq->private;
spin_lock(&unix_table_lock);
@@ -2055,6 +2056,7 @@ static void *unix_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void unix_seq_stop(struct seq_file *seq, void *v)
+ __releases(unix_table_lock)
{
spin_unlock(&unix_table_lock);
}
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 6bf876c866df..65f5ea4ae4c1 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -211,6 +211,7 @@ static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
}
static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
+ __releases(xfrm_state_afinfo_lock)
{
write_unlock_bh(&xfrm_state_afinfo_lock);
}
@@ -1909,6 +1910,7 @@ static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
}
static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
+ __releases(xfrm_state_afinfo_lock)
{
read_unlock(&xfrm_state_afinfo_lock);
}