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SCTP: Update RCU handling during the ADD-IP case

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After learning more about rcu, it looks like the ADD-IP hadling
doesn't need to call call_rcu_bh.  All the rcu critical sections
use rcu_read_lock, so using call_rcu_bh is wrong here.
Now, restore the local_bh_disable() code blocks and use normal
call_rcu() calls.  Also restore the missing return statement.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
This commit is contained in:
Vlad Yasevich 2007-10-24 16:10:00 -04:00
parent b6157d8e03
commit 0ed90fb0f6
4 changed files with 10 additions and 15 deletions
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13
net/sctp/bind_addr.c
View file

@ -180,9 +180,7 @@ int sctp_add_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *new,
/* Delete an address from the bind address list in the SCTP_bind_addr
* structure.
*/
int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr,
void fastcall (*rcu_call)(struct rcu_head *head,
void (*func)(struct rcu_head *head)))
int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr)
{
struct sctp_sockaddr_entry *addr, *temp;
@ -198,15 +196,10 @@ int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr,
}
}
/* Call the rcu callback provided in the args. This function is
* called by both BH packet processing and user side socket option
* processing, but it works on different lists in those 2 contexts.
* Each context provides it's own callback, whether call_rcu_bh()
* or call_rcu(), to make sure that we wait for an appropriate time.
*/
if (addr && !addr->valid) {
rcu_call(&addr->rcu, sctp_local_addr_free);
call_rcu(&addr->rcu, sctp_local_addr_free);
SCTP_DBG_OBJCNT_DEC(addr);
return 0;
}
return -EINVAL;