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net: remove bh disabling around percpu_counter accesses 

Shaohua Li made percpu_counter irq safe in commit 098faf5805
("percpu_counter: make APIs irq safe")

We can safely remove BH disable/enable sections around various
percpu_counter manipulations.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-01-20 05:06:08 -08:00 committed by David S. Miller
parent 0a327889f6
commit c2a2efbbfc
6 changed files with 3 additions and 23 deletions
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9
include/net/dst_ops.h
View File

@ -46,19 +46,12 @@ static inline int dst_entries_get_fast(struct dst_ops *dst)
static inline int dst_entries_get_slow(struct dst_ops *dst)
{
int res;
local_bh_disable();
res = percpu_counter_sum_positive(&dst->pcpuc_entries);
local_bh_enable();
return res;
return percpu_counter_sum_positive(&dst->pcpuc_entries);
}
static inline void dst_entries_add(struct dst_ops *dst, int val)
{
local_bh_disable();
percpu_counter_add(&dst->pcpuc_entries, val);
local_bh_enable();
}
static inline int dst_entries_init(struct dst_ops *dst)

8
include/net/inet_frag.h
View File

@ -164,13 +164,7 @@ static inline void add_frag_mem_limit(struct netns_frags *nf, int i)
static inline unsigned int sum_frag_mem_limit(struct netns_frags *nf)
{
unsigned int res;
local_bh_disable();
res = percpu_counter_sum_positive(&nf->mem);
local_bh_enable();
return res;
return percpu_counter_sum_positive(&nf->mem);
}
/* RFC 3168 support :

3
net/ipv4/inet_connection_sock.c
View File

@ -836,9 +836,8 @@ void inet_csk_destroy_sock(struct sock *sk)
sk_refcnt_debug_release(sk);
local_bh_disable();
percpu_counter_dec(sk->sk_prot->orphan_count);
local_bh_enable();
sock_put(sk);
}
EXPORT_SYMBOL(inet_csk_destroy_sock);

2
net/ipv4/proc.c
View File

@ -57,10 +57,8 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
unsigned int frag_mem;
int orphans, sockets;
local_bh_disable();
orphans = percpu_counter_sum_positive(&tcp_orphan_count);
sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
local_bh_enable();
socket_seq_show(seq);
seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",

2
net/ipv4/tcp.c
View File

@ -420,9 +420,7 @@ void tcp_init_sock(struct sock *sk)
sk->sk_sndbuf = sysctl_tcp_wmem[1];
sk->sk_rcvbuf = sysctl_tcp_rmem[1];
local_bh_disable();
sk_sockets_allocated_inc(sk);
local_bh_enable();
}
EXPORT_SYMBOL(tcp_init_sock);

2
net/ipv4/tcp_ipv4.c
View File

@ -1887,9 +1887,7 @@ void tcp_v4_destroy_sock(struct sock *sk)
tcp_free_fastopen_req(tp);
tcp_saved_syn_free(tp);
local_bh_disable();
sk_sockets_allocated_dec(sk);
local_bh_enable();
}
EXPORT_SYMBOL(tcp_v4_destroy_sock);