5 files changed, 62 insertions, 3 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 62762390c93d..e52d5b3ee45e 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1573,12 +1573,26 @@ struct bpf_link {
 	enum bpf_link_type type;
 	const struct bpf_link_ops *ops;
 	struct bpf_prog *prog;
-	struct work_struct work;
+	/* rcu is used before freeing, work can be used to schedule that
+	 * RCU-based freeing before that, so they never overlap
+	 */
+	union {
+		struct rcu_head rcu;
+		struct work_struct work;
+	};
 };
 
 struct bpf_link_ops {
 	void (*release)(struct bpf_link *link);
+	/* deallocate link resources callback, called without RCU grace period
+	 * waiting
+	 */
 	void (*dealloc)(struct bpf_link *link);
+	/* deallocate link resources callback, called after RCU grace period;
+	 * if underlying BPF program is sleepable we go through tasks trace
+	 * RCU GP and then "classic" RCU GP
+	 */
+	void (*dealloc_deferred)(struct bpf_link *link);
 	int (*detach)(struct bpf_link *link);
 	int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
 			   struct bpf_prog *old_prog);
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index dc75f802e284..f8617eaf08ba 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -646,8 +646,6 @@ int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip *gc,
 struct gpio_device *gpio_device_find(const void *data,
 				int (*match)(struct gpio_chip *gc,
 					     const void *data));
-struct gpio_device *gpio_device_find_by_label(const char *label);
-struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode);
 
 struct gpio_device *gpio_device_get(struct gpio_device *gdev);
 void gpio_device_put(struct gpio_device *gdev);
@@ -814,6 +812,9 @@ struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc);
 int gpio_device_get_base(struct gpio_device *gdev);
 const char *gpio_device_get_label(struct gpio_device *gdev);
 
+struct gpio_device *gpio_device_find_by_label(const char *label);
+struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode);
+
 #else /* CONFIG_GPIOLIB */
 
 #include <asm/bug.h>
@@ -843,6 +844,18 @@ static inline const char *gpio_device_get_label(struct gpio_device *gdev)
 	return NULL;
 }
 
+static inline struct gpio_device *gpio_device_find_by_label(const char *label)
+{
+	WARN_ON(1);
+	return NULL;
+}
+
+static inline struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode)
+{
+	WARN_ON(1);
+	return NULL;
+}
+
 static inline int gpiochip_lock_as_irq(struct gpio_chip *gc,
 				       unsigned int offset)
 {
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 76121c2bb4f8..5c9bdd3ffccc 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -67,6 +67,8 @@
  *                later.
  * IRQF_NO_DEBUG - Exclude from runnaway detection for IPI and similar handlers,
  *		   depends on IRQF_PERCPU.
+ * IRQF_COND_ONESHOT - Agree to do IRQF_ONESHOT if already set for a shared
+ *                 interrupt.
  */
 #define IRQF_SHARED		0x00000080
 #define IRQF_PROBE_SHARED	0x00000100
@@ -82,6 +84,7 @@
 #define IRQF_COND_SUSPEND	0x00040000
 #define IRQF_NO_AUTOEN		0x00080000
 #define IRQF_NO_DEBUG		0x00100000
+#define IRQF_COND_ONESHOT	0x00200000
 
 #define IRQF_TIMER		(__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD)
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 26d68115afb8..324d792e7c78 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -107,6 +107,7 @@ enum {
 
 	ATA_DFLAG_NCQ_PRIO_ENABLED = (1 << 20), /* Priority cmds sent to dev */
 	ATA_DFLAG_CDL_ENABLED	= (1 << 21), /* cmd duration limits is enabled */
+	ATA_DFLAG_RESUMING	= (1 << 22),  /* Device is resuming */
 	ATA_DFLAG_DETACH	= (1 << 24),
 	ATA_DFLAG_DETACHED	= (1 << 25),
 	ATA_DFLAG_DA		= (1 << 26), /* device supports Device Attention */
diff --git a/include/linux/udp.h b/include/linux/udp.h
index 3748e82b627b..17539d089666 100644
--- a/include/linux/udp.h
+++ b/include/linux/udp.h
@@ -150,6 +150,24 @@ static inline void udp_cmsg_recv(struct msghdr *msg, struct sock *sk,
 	}
 }
 
+DECLARE_STATIC_KEY_FALSE(udp_encap_needed_key);
+#if IS_ENABLED(CONFIG_IPV6)
+DECLARE_STATIC_KEY_FALSE(udpv6_encap_needed_key);
+#endif
+
+static inline bool udp_encap_needed(void)
+{
+	if (static_branch_unlikely(&udp_encap_needed_key))
+		return true;
+
+#if IS_ENABLED(CONFIG_IPV6)
+	if (static_branch_unlikely(&udpv6_encap_needed_key))
+		return true;
+#endif
+
+	return false;
+}
+
 static inline bool udp_unexpected_gso(struct sock *sk, struct sk_buff *skb)
 {
 	if (!skb_is_gso(skb))
@@ -163,6 +181,16 @@ static inline bool udp_unexpected_gso(struct sock *sk, struct sk_buff *skb)
 	    !udp_test_bit(ACCEPT_FRAGLIST, sk))
 		return true;
 
+	/* GSO packets lacking the SKB_GSO_UDP_TUNNEL/_CSUM bits might still
+	 * land in a tunnel as the socket check in udp_gro_receive cannot be
+	 * foolproof.
+	 */
+	if (udp_encap_needed() &&
+	    READ_ONCE(udp_sk(sk)->encap_rcv) &&
+	    !(skb_shinfo(skb)->gso_type &
+	      (SKB_GSO_UDP_TUNNEL | SKB_GSO_UDP_TUNNEL_CSUM)))
+		return true;
+
 	return false;
 }