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| author | Monam Agarwal <monamagarwal123@gmail.com> | 2014-03-24 00:02:32 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-27 00:18:09 -0400 |
| commit | c956674b7c89e7992a09df309a9f226f02733421 (patch) | |
| tree | 0763a326457ca49fafa6c4fb84ee3517bb1efeb1 | |
| parent | 8800a244fa1ab75192cf65ecf8e3ca3ec1420b1b (diff) | |
| download | blackbird-op-linux-c956674b7c89e7992a09df309a9f226f02733421.tar.gz blackbird-op-linux-c956674b7c89e7992a09df309a9f226f02733421.zip | |
drivers/net: Use RCU_INIT_POINTER(x, NULL) in tun.c
This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL)
The rcu_assign_pointer() ensures that the initialization of a structure
is carried out before storing a pointer to that structure.
And in the case of the NULL pointer, there is no structure to initialize.
So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL)
Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/tun.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 26f8635b027d..ee328ba101e7 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -452,7 +452,7 @@ static void __tun_detach(struct tun_file *tfile, bool clean) --tun->numqueues; if (clean) { - rcu_assign_pointer(tfile->tun, NULL); + RCU_INIT_POINTER(tfile->tun, NULL); sock_put(&tfile->sk); } else tun_disable_queue(tun, tfile); @@ -499,12 +499,12 @@ static void tun_detach_all(struct net_device *dev) tfile = rtnl_dereference(tun->tfiles[i]); BUG_ON(!tfile); wake_up_all(&tfile->wq.wait); - rcu_assign_pointer(tfile->tun, NULL); + RCU_INIT_POINTER(tfile->tun, NULL); --tun->numqueues; } list_for_each_entry(tfile, &tun->disabled, next) { wake_up_all(&tfile->wq.wait); - rcu_assign_pointer(tfile->tun, NULL); + RCU_INIT_POINTER(tfile->tun, NULL); } BUG_ON(tun->numqueues != 0); @@ -2194,7 +2194,7 @@ static int tun_chr_open(struct inode *inode, struct file * file) &tun_proto); if (!tfile) return -ENOMEM; - rcu_assign_pointer(tfile->tun, NULL); + RCU_INIT_POINTER(tfile->tun, NULL); tfile->net = get_net(current->nsproxy->net_ns); tfile->flags = 0; tfile->ifindex = 0; |
