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authorAl Viro <viro@zeniv.linux.org.uk>2019-07-05 20:14:16 +0100
committerDavid S. Miller <davem@davemloft.net>2019-07-08 19:25:19 -0700
commit333f7909a8573145811c4ab7d8c9092301707721 (patch)
tree313fbf52f203f67375d0d378198a70a4de732a93 /drivers/net/tun.c
parent6d7855c54e1e269275d7c504f8f62a0b7a5b3f18 (diff)
coallocate socket_wq with socket itself
socket->wq is assign-once, set when we are initializing both struct socket it's in and struct socket_wq it points to. As the matter of fact, the only reason for separate allocation was the ability to RCU-delay freeing of socket_wq. RCU-delaying the freeing of socket itself gets rid of that need, so we can just fold struct socket_wq into the end of struct socket and simplify the life both for sock_alloc_inode() (one allocation instead of two) and for tun/tap oddballs, where we used to embed struct socket and struct socket_wq into the same structure (now - embedding just the struct socket). Note that reference to struct socket_wq in struct sock does remain a reference - that's unchanged. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tun.c')
-rw-r--r--drivers/net/tun.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index d7c55e0fa8f4..3d443597bd04 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -160,7 +160,6 @@ struct tun_pcpu_stats {
struct tun_file {
struct sock sk;
struct socket socket;
- struct socket_wq wq;
struct tun_struct __rcu *tun;
struct fasync_struct *fasync;
/* only used for fasnyc */
@@ -2165,7 +2164,7 @@ static void *tun_ring_recv(struct tun_file *tfile, int noblock, int *err)
goto out;
}
- add_wait_queue(&tfile->wq.wait, &wait);
+ add_wait_queue(&tfile->socket.wq.wait, &wait);
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
@@ -2185,7 +2184,7 @@ static void *tun_ring_recv(struct tun_file *tfile, int noblock, int *err)
}
__set_current_state(TASK_RUNNING);
- remove_wait_queue(&tfile->wq.wait, &wait);
+ remove_wait_queue(&tfile->socket.wq.wait, &wait);
out:
*err = error;
@@ -3415,8 +3414,7 @@ static int tun_chr_open(struct inode *inode, struct file * file)
tfile->flags = 0;
tfile->ifindex = 0;
- init_waitqueue_head(&tfile->wq.wait);
- RCU_INIT_POINTER(tfile->socket.wq, &tfile->wq);
+ init_waitqueue_head(&tfile->socket.wq.wait);
tfile->socket.file = file;
tfile->socket.ops = &tun_socket_ops;