Merge git://git.kvack.org/~bcrl/aio-next

Pull aio changes from Ben LaHaise:
 "First off, sorry for this pull request being late in the merge window.
  Al had raised a couple of concerns about 2 items in the series below.
  I addressed the first issue (the race introduced by Gu's use of
  mm_populate()), but he has not provided any further details on how he
  wants to rework the anon_inode.c changes (which were sent out months
  ago but have yet to be commented on).

  The bulk of the changes have been sitting in the -next tree for a few
  months, with all the issues raised being addressed"

* git://git.kvack.org/~bcrl/aio-next: (22 commits)
  aio: rcu_read_lock protection for new rcu_dereference calls
  aio: fix race in ring buffer page lookup introduced by page migration support
  aio: fix rcu sparse warnings introduced by ioctx table lookup patch
  aio: remove unnecessary debugging from aio_free_ring()
  aio: table lookup: verify ctx pointer
  staging/lustre: kiocb->ki_left is removed
  aio: fix error handling and rcu usage in "convert the ioctx list to table lookup v3"
  aio: be defensive to ensure request batching is non-zero instead of BUG_ON()
  aio: convert the ioctx list to table lookup v3
  aio: double aio_max_nr in calculations
  aio: Kill ki_dtor
  aio: Kill ki_users
  aio: Kill unneeded kiocb members
  aio: Kill aio_rw_vect_retry()
  aio: Don't use ctx->tail unnecessarily
  aio: io_cancel() no longer returns the io_event
  aio: percpu ioctx refcount
  aio: percpu reqs_available
  aio: reqs_active -> reqs_available
  aio: fix build when migration is disabled
  ...

drivers/staging/android/logger.c

@@ -481,7 +481,7 @@ static ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	header.sec = now.tv_sec;
 	header.nsec = now.tv_nsec;
 	header.euid = current_euid();
-	header.len = min_t(size_t, iocb->ki_left, LOGGER_ENTRY_MAX_PAYLOAD);
+	header.len = min_t(size_t, iocb->ki_nbytes, LOGGER_ENTRY_MAX_PAYLOAD);
 	header.hdr_size = sizeof(struct logger_entry);
 
 	/* null writes succeed, return zero */

drivers/staging/lustre/lustre/llite/file.c

@@ -1009,7 +1009,7 @@ static ssize_t ll_file_read(struct file *file, char *buf, size_t count,
 	local_iov->iov_len = count;
 	init_sync_kiocb(kiocb, file);
 	kiocb->ki_pos = *ppos;
-	kiocb->ki_left = count;
+	kiocb->ki_nbytes = count;
 
 	result = ll_file_aio_read(kiocb, local_iov, 1, kiocb->ki_pos);
 	*ppos = kiocb->ki_pos;
@@ -1068,7 +1068,7 @@ static ssize_t ll_file_write(struct file *file, const char *buf, size_t count,
 	local_iov->iov_len = count;
 	init_sync_kiocb(kiocb, file);
 	kiocb->ki_pos = *ppos;
-	kiocb->ki_left = count;
+	kiocb->ki_nbytes = count;
 
 	result = ll_file_aio_write(kiocb, local_iov, 1, kiocb->ki_pos);
 	*ppos = kiocb->ki_pos;

drivers/usb/gadget/inode.c

@@ -524,7 +524,7 @@ struct kiocb_priv {
 	unsigned		actual;
 };
 
-static int ep_aio_cancel(struct kiocb *iocb, struct io_event *e)
+static int ep_aio_cancel(struct kiocb *iocb)
 {
 	struct kiocb_priv	*priv = iocb->private;
 	struct ep_data		*epdata;
@@ -540,7 +540,6 @@ static int ep_aio_cancel(struct kiocb *iocb, struct io_event *e)
 	// spin_unlock(&epdata->dev->lock);
 	local_irq_enable();
 
-	aio_put_req(iocb);
 	return value;
 }
 
@@ -709,11 +708,11 @@ ep_aio_read(struct kiocb *iocb, const struct iovec *iov,
 	if (unlikely(usb_endpoint_dir_in(&epdata->desc)))
 		return -EINVAL;
 
-	buf = kmalloc(iocb->ki_left, GFP_KERNEL);
+	buf = kmalloc(iocb->ki_nbytes, GFP_KERNEL);
 	if (unlikely(!buf))
 		return -ENOMEM;
 
-	return ep_aio_rwtail(iocb, buf, iocb->ki_left, epdata, iov, nr_segs);
+	return ep_aio_rwtail(iocb, buf, iocb->ki_nbytes, epdata, iov, nr_segs);
 }
 
 static ssize_t
@@ -728,7 +727,7 @@ ep_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	if (unlikely(!usb_endpoint_dir_in(&epdata->desc)))
 		return -EINVAL;
 
-	buf = kmalloc(iocb->ki_left, GFP_KERNEL);
+	buf = kmalloc(iocb->ki_nbytes, GFP_KERNEL);
 	if (unlikely(!buf))
 		return -ENOMEM;