[PATCH] vhost: Fix typos in comments and clarity on alignof usage

[Alok Tiwari <alok.a.tiwari@xxxxxxxxxx>]

This patch fixes multiple typos and improves comment clarity across
vhost.c.
- Correct spelling errors: "thead" -> "thread", "RUNNUNG" -> "RUNNING"
  and "available".
- Improve comment by replacing informal comment ("Supersize me!")
  with a clear description.
- Use __alignof__ correctly on dereferenced pointer types for better
  readability and alignment with kernel documentation.

These changes enhance code readability and maintainability.

Signed-off-by: Alok Tiwari <alok.a.tiwari@xxxxxxxxxx>
---
 drivers/vhost/vhost.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 3a5ebb973dba..0227c123c0e0 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -594,10 +594,10 @@ static void vhost_attach_mm(struct vhost_dev *dev)
 	if (dev->use_worker) {
 		dev->mm = get_task_mm(current);
 	} else {
-		/* vDPA device does not use worker thead, so there's
-		 * no need to hold the address space for mm. This help
+		/* vDPA device does not use worker thread, so there's
+		 * no need to hold the address space for mm. This helps
 		 * to avoid deadlock in the case of mmap() which may
-		 * held the refcnt of the file and depends on release
+		 * hold the refcnt of the file and depends on release
 		 * method to remove vma.
 		 */
 		dev->mm = current->mm;
@@ -731,7 +731,7 @@ static void __vhost_vq_attach_worker(struct vhost_virtqueue *vq,
 	 * We don't want to call synchronize_rcu for every vq during setup
 	 * because it will slow down VM startup. If we haven't done
 	 * VHOST_SET_VRING_KICK and not done the driver specific
-	 * SET_ENDPOINT/RUNNUNG then we can skip the sync since there will
+	 * SET_ENDPOINT/RUNNING then we can skip the sync since there will
 	 * not be any works queued for scsi and net.
 	 */
 	mutex_lock(&vq->mutex);
@@ -1898,8 +1898,8 @@ static long vhost_vring_set_addr(struct vhost_dev *d,
 		return -EFAULT;
 
 	/* Make sure it's safe to cast pointers to vring types. */
-	BUILD_BUG_ON(__alignof__ *vq->avail > VRING_AVAIL_ALIGN_SIZE);
-	BUILD_BUG_ON(__alignof__ *vq->used > VRING_USED_ALIGN_SIZE);
+	BUILD_BUG_ON(__alignof__(*vq->avail) > VRING_AVAIL_ALIGN_SIZE);
+	BUILD_BUG_ON(__alignof__(*vq->used) > VRING_USED_ALIGN_SIZE);
 	if ((a.avail_user_addr & (VRING_AVAIL_ALIGN_SIZE - 1)) ||
 	    (a.used_user_addr & (VRING_USED_ALIGN_SIZE - 1)) ||
 	    (a.log_guest_addr & (VRING_USED_ALIGN_SIZE - 1)))
@@ -2840,7 +2840,7 @@ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq)
 }
 EXPORT_SYMBOL_GPL(vhost_signal);
 
-/* And here's the combo meal deal.  Supersize me! */
+/* Add to used ring and signal guest. */
 void vhost_add_used_and_signal(struct vhost_dev *dev,
 			       struct vhost_virtqueue *vq,
 			       unsigned int head, int len)
@@ -2860,7 +2860,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *dev,
 }
 EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n);
 
-/* return true if we're sure that avaiable ring is empty */
+/* return true if we're sure that available ring is empty */
 bool vhost_vq_avail_empty(struct vhost_dev *dev, struct vhost_virtqueue *vq)
 {
 	int r;
-- 
2.47.1