workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted

apply_wqattrs_commit() updates node_nr_active->max unconditionally.
wq->node_nr_active[] is only allocated for unbound workqueues, so guard
the call before per-cpu workqueues start using this path.

No functional change: only unbound workqueues reach apply_wqattrs_*()
today.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/include/net/af_unix.h b/include/net/af_unix.h
new file mode 100644
index 000000000..34f53dde6
--- /dev/null
+++ b/include/net/af_unix.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_NET_AFUNIX_H
+#define __LINUX_NET_AFUNIX_H
+
+#include <linux/atomic.h>
+#include <linux/mutex.h>
+#include <linux/net.h>
+#include <linux/path.h>
+#include <linux/refcount.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <net/sock.h>
+#include <uapi/linux/un.h>
+
+#if IS_ENABLED(CONFIG_UNIX)
+struct unix_sock *unix_get_socket(struct file *filp);
+#else
+static inline struct unix_sock *unix_get_socket(struct file *filp)
+{
+	return NULL;
+}
+#endif
+
+struct unix_address {
+	refcount_t	refcnt;
+	int		len;
+	struct sockaddr_un name[];
+};
+
+struct scm_stat {
+	atomic_t nr_fds;
+	unsigned long nr_unix_fds;
+};
+
+/* The AF_UNIX socket */
+struct unix_sock {
+	/* WARNING: sk has to be the first member */
+	struct sock		sk;
+	struct unix_address	*addr;
+	struct path		path;
+	struct mutex		iolock, bindlock;
+	struct sock		*peer;
+	struct sock		*listener;
+	struct unix_vertex	*vertex;
+	spinlock_t		lock;
+	struct socket_wq	peer_wq;
+#define peer_wait		peer_wq.wait
+	wait_queue_entry_t	peer_wake;
+	struct scm_stat		scm_stat;
+	int			inq_len;
+	bool			recvmsg_inq;
+#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
+	struct sk_buff		*oob_skb;
+#endif
+};
+
+#define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)
+#define unix_peer(sk) (unix_sk(sk)->peer)
+
+#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
+#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
+
+#endif