[PATCH 2/7] poll: Add a poll_flags for poll_queue_proc()

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Allows the poll enqueue function to pass over a flag into it.

Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
 drivers/vfio/virqfd.c     | 4 ++--
 drivers/vhost/vhost.c     | 2 +-
 drivers/virt/acrn/irqfd.c | 2 +-
 fs/aio.c                  | 2 +-
 fs/eventpoll.c            | 2 +-
 fs/select.c               | 4 ++--
 include/linux/poll.h      | 7 +++++--
 io_uring/poll.c           | 4 ++--
 mm/memcontrol.c           | 4 +++-
 net/9p/trans_fd.c         | 3 ++-
 virt/kvm/eventfd.c        | 2 +-
 11 files changed, 21 insertions(+), 15 deletions(-)

diff --git a/drivers/vfio/virqfd.c b/drivers/vfio/virqfd.c
index 29c564b7a6e1..4b817a6f4f72 100644
--- a/drivers/vfio/virqfd.c
+++ b/drivers/vfio/virqfd.c
@@ -75,8 +75,8 @@ static int virqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void
 	return 0;
 }
 
-static void virqfd_ptable_queue_proc(struct file *file,
-				     wait_queue_head_t *wqh, poll_table *pt)
+static void virqfd_ptable_queue_proc(struct file *file, wait_queue_head_t *wqh,
+				     poll_table *pt, poll_flags flags)
 {
 	struct virqfd *virqfd = container_of(pt, struct virqfd, pt);
 	add_wait_queue(wqh, &virqfd->wait);
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index c71d573f1c94..02caad721843 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -162,7 +162,7 @@ static void vhost_poll_func(struct file *file, wait_queue_head_t *wqh,
 }
 
 static int vhost_poll_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync,
-			     void *key)
+			     void *key, poll_flags flags)
 {
 	struct vhost_poll *poll = container_of(wait, struct vhost_poll, wait);
 	struct vhost_work *work = &poll->work;
diff --git a/drivers/virt/acrn/irqfd.c b/drivers/virt/acrn/irqfd.c
index d4ad211dce7a..9b79e4e76e49 100644
--- a/drivers/virt/acrn/irqfd.c
+++ b/drivers/virt/acrn/irqfd.c
@@ -94,7 +94,7 @@ static int hsm_irqfd_wakeup(wait_queue_entry_t *wait, unsigned int mode,
 }
 
 static void hsm_irqfd_poll_func(struct file *file, wait_queue_head_t *wqh,
-				poll_table *pt)
+				poll_table *pt, poll_flags flags)
 {
 	struct hsm_irqfd *irqfd;
 
diff --git a/fs/aio.c b/fs/aio.c
index a4c2a6bac72c..abb5b22f4fdf 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1823,7 +1823,7 @@ struct aio_poll_table {
 
 static void
 aio_poll_queue_proc(struct file *file, struct wait_queue_head *head,
-		struct poll_table_struct *p)
+		    struct poll_table_struct *p, poll_flags flags)
 {
 	struct aio_poll_table *pt = container_of(p, struct aio_poll_table, pt);
 
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 1d9a71a0c4c1..c74d6a083fd1 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1270,7 +1270,7 @@ static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, v
  * target file wakeup lists.
  */
 static void ep_ptable_queue_proc(struct file *file, wait_queue_head_t *whead,
-				 poll_table *pt)
+				 poll_table *pt, poll_flags flags)
 {
 	struct ep_pqueue *epq = container_of(pt, struct ep_pqueue, pt);
 	struct epitem *epi = epq->epi;
diff --git a/fs/select.c b/fs/select.c
index 0ee55af1a55c..0433448481e9 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -117,7 +117,7 @@ struct poll_table_page {
  * poll table.
  */
 static void __pollwait(struct file *filp, wait_queue_head_t *wait_address,
-		       poll_table *p);
+		       poll_table *p, poll_flags flags);
 
 void poll_initwait(struct poll_wqueues *pwq)
 {
@@ -220,7 +220,7 @@ static int pollwake(wait_queue_entry_t *wait, unsigned mode, int sync, void *key
 
 /* Add a new entry */
 static void __pollwait(struct file *filp, wait_queue_head_t *wait_address,
-				poll_table *p)
+		       poll_table *p, poll_flags flags)
 {
 	struct poll_wqueues *pwq = container_of(p, struct poll_wqueues, pt);
 	struct poll_table_entry *entry = poll_get_entry(pwq);
diff --git a/include/linux/poll.h b/include/linux/poll.h
index a9e0e1c2d1f2..cbad520fc65c 100644
--- a/include/linux/poll.h
+++ b/include/linux/poll.h
@@ -27,12 +27,15 @@
 
 #define DEFAULT_POLLMASK (EPOLLIN | EPOLLOUT | EPOLLRDNORM | EPOLLWRNORM)
 
+typedef unsigned int poll_flags;
+
 struct poll_table_struct;
 
 /* 
  * structures and helpers for f_op->poll implementations
  */
-typedef void (*poll_queue_proc)(struct file *, wait_queue_head_t *, struct poll_table_struct *);
+typedef void (*poll_queue_proc)(struct file *, wait_queue_head_t *,
+				struct poll_table_struct *, poll_flags);
 
 /*
  * Do not touch the structure directly, use the access functions
@@ -46,7 +49,7 @@ typedef struct poll_table_struct {
 static inline void poll_wait(struct file * filp, wait_queue_head_t * wait_address, poll_table *p)
 {
 	if (p && p->_qproc && wait_address)
-		p->_qproc(filp, wait_address, p);
+		p->_qproc(filp, wait_address, p, 0);
 }
 
 /*
diff --git a/io_uring/poll.c b/io_uring/poll.c
index 4c360ba8793a..c3b41e963a8d 100644
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -533,7 +533,7 @@ static void __io_queue_proc(struct io_poll *poll, struct io_poll_table *pt,
 }
 
 static void io_poll_queue_proc(struct file *file, struct wait_queue_head *head,
-			       struct poll_table_struct *p)
+			       struct poll_table_struct *p, poll_flags flags)
 {
 	struct io_poll_table *pt = container_of(p, struct io_poll_table, pt);
 	struct io_poll *poll = io_kiocb_to_cmd(pt->req, struct io_poll);
@@ -644,7 +644,7 @@ static int __io_arm_poll_handler(struct io_kiocb *req,
 }
 
 static void io_async_queue_proc(struct file *file, struct wait_queue_head *head,
-			       struct poll_table_struct *p)
+				struct poll_table_struct *p, poll_flags flags)
 {
 	struct io_poll_table *pt = container_of(p, struct io_poll_table, pt);
 	struct async_poll *apoll = pt->req->apoll;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ecc07b47e813..97b03ab30d5e 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4877,7 +4877,9 @@ static int memcg_event_wake(wait_queue_entry_t *wait, unsigned mode,
 }
 
 static void memcg_event_ptable_queue_proc(struct file *file,
-		wait_queue_head_t *wqh, poll_table *pt)
+					  wait_queue_head_t *wqh,
+					  poll_table *pt,
+					  poll_flags flags)
 {
 	struct mem_cgroup_event *event =
 		container_of(pt, struct mem_cgroup_event, pt);
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index c4015f30f9fa..91f9f474ab01 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -550,7 +550,8 @@ static int p9_pollwake(wait_queue_entry_t *wait, unsigned int mode, int sync, vo
  */
 
 static void
-p9_pollwait(struct file *filp, wait_queue_head_t *wait_address, poll_table *p)
+p9_pollwait(struct file *filp, wait_queue_head_t *wait_address, poll_table *p,
+	    poll_flags flags)
 {
 	struct p9_conn *m = container_of(p, struct p9_conn, pt);
 	struct p9_poll_wait *pwait = NULL;
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 89912a17f5d5..645b5d155386 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -246,7 +246,7 @@ irqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void *key)
 
 static void
 irqfd_ptable_queue_proc(struct file *file, wait_queue_head_t *wqh,
-			poll_table *pt)
+			poll_table *pt, poll_flags flags)
 {
 	struct kvm_kernel_irqfd *irqfd =
 		container_of(pt, struct kvm_kernel_irqfd, pt);
-- 
2.41.0




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