xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ipv6: update the comment in mcast.c

Browse Source 
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
WANG Cong
2014-09-11 15:35:15 -07:00
committed by David S. Miller
parent 414b6c943f
commit f7ed925c1b
1 changed files with 5 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
net/ipv6/mcast.c
View File

@@ -556,9 +556,8 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
} }
err = -EADDRNOTAVAIL; err = -EADDRNOTAVAIL;
/* /* changes to the ipv6_mc_list require the socket lock and
* changes to the ipv6_mc_list require the socket lock and * rtnl lock. We have the socket lock and rcu read lock,
* a read lock on ip6_sk_mc_lock. We have the socket lock,
* so reading the list is safe. * so reading the list is safe.
*/ */
@@ -582,9 +581,8 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
return -EFAULT; return -EFAULT;
} }
/* changes to psl require the socket lock, a read lock on /* changes to psl require the socket lock, and a write lock
* on ipv6_sk_mc_lock and a write lock on pmc->sflock. We * on pmc->sflock. We have the socket lock so reading here is safe.
* have the socket lock, so reading here is safe.
*/ */
for (i = 0; i < copycount; i++) { for (i = 0; i < copycount; i++) {
struct sockaddr_in6 *psin6; struct sockaddr_in6 *psin6;
@@ -2350,7 +2348,7 @@ static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
{ {
int err; int err;
/* callers have the socket lock and a write lock on ipv6_sk_mc_lock, /* callers have the socket lock and rtnl lock
* so no other readers or writers of iml or its sflist * so no other readers or writers of iml or its sflist
*/ */
if (!iml->sflist) { if (!iml->sflist) {