Commit e0ad61ec authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

net: add __rcu annotations to protocol

Add __rcu annotations to :
        struct net_protocol *inet_protos
        struct net_protocol *inet6_protos

And use appropriate casts to reduce sparse warnings if
CONFIG_SPARSE_RCU_POINTER=y
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1c31720a
......@@ -89,10 +89,10 @@ struct inet_protosw {
#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
extern const struct net_protocol *inet_protos[MAX_INET_PROTOS];
extern const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
extern const struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
#endif
extern int inet_add_protocol(const struct net_protocol *prot, unsigned char num);
......
......@@ -28,7 +28,7 @@
#include <linux/spinlock.h>
#include <net/protocol.h>
const struct net_protocol *inet_protos[MAX_INET_PROTOS] __read_mostly;
const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS] __read_mostly;
/*
* Add a protocol handler to the hash tables
......@@ -38,7 +38,8 @@ int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol)
{
int hash = protocol & (MAX_INET_PROTOS - 1);
return !cmpxchg(&inet_protos[hash], NULL, prot) ? 0 : -1;
return !cmpxchg((const struct net_protocol **)&inet_protos[hash],
NULL, prot) ? 0 : -1;
}
EXPORT_SYMBOL(inet_add_protocol);
......@@ -50,7 +51,8 @@ int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol)
{
int ret, hash = protocol & (MAX_INET_PROTOS - 1);
ret = (cmpxchg(&inet_protos[hash], prot, NULL) == prot) ? 0 : -1;
ret = (cmpxchg((const struct net_protocol **)&inet_protos[hash],
prot, NULL) == prot) ? 0 : -1;
synchronize_net();
......
......@@ -25,13 +25,14 @@
#include <linux/spinlock.h>
#include <net/protocol.h>
const struct inet6_protocol *inet6_protos[MAX_INET_PROTOS] __read_mostly;
const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly;
int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
{
int hash = protocol & (MAX_INET_PROTOS - 1);
return !cmpxchg(&inet6_protos[hash], NULL, prot) ? 0 : -1;
return !cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],
NULL, prot) ? 0 : -1;
}
EXPORT_SYMBOL(inet6_add_protocol);
......@@ -43,7 +44,8 @@ int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol
{
int ret, hash = protocol & (MAX_INET_PROTOS - 1);
ret = (cmpxchg(&inet6_protos[hash], prot, NULL) == prot) ? 0 : -1;
ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],
prot, NULL) == prot) ? 0 : -1;
synchronize_net();
......
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