[PATCH] Update VIRTIO_F_EVENT_IDX throughout

[Joel Nider <joel@nider.org>]

This flag has been called by many names in the past
(VIRTIO_RING_F_EVENT_IDX, VIRTIO_F_RING_EVENT_IDX) and there are
just a few stragglers left to clean up.

Signed-off-by: Joel Nider <joel@nider.org>
---
 content.tex     | 2 +-
 packed-ring.tex | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/content.tex b/content.tex
index 9232d5c..5a803dc 100644
--- a/content.tex
+++ b/content.tex
@@ -6581,7 +6581,7 @@ \chapter{Reserved Feature Bits}\label{sec:Reserved Feature Bits}
 Descriptors}~\nameref{sec:Basic Facilities of a Virtio Device /
 Virtqueues / The Virtqueue Descriptor Table / Indirect
 Descriptors} and \ref{sec:Packed Virtqueues / Indirect Flag: Scatter-Gather Support}~\nameref{sec:Packed Virtqueues / Indirect Flag: Scatter-Gather Support}.
-  \item[VIRTIO_F_RING_EVENT_IDX(29)] This feature enables the \field{used_event}
+  \item[VIRTIO_F_EVENT_IDX(29)] This feature enables the \field{used_event}
   and the \field{avail_event} fields as described in
 \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / Used Buffer Notification Suppression}, \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Used Ring} and \ref{sec:Packed Virtqueues / Driver and Device Event Suppression}.
 
diff --git a/packed-ring.tex b/packed-ring.tex
index ea92543..a9e6c16 100644
--- a/packed-ring.tex
+++ b/packed-ring.tex
@@ -336,7 +336,7 @@ \subsection{Driver and Device Event Suppression}
 /*
  * Enable events for a specific descriptor
  * (as specified by Descriptor Ring Change Event Offset/Wrap Counter).
- * Only valid if VIRTIO_F_RING_EVENT_IDX has been negotiated.
+ * Only valid if VIRTIO_F_EVENT_IDX has been negotiated.
  */
 #define RING_EVENT_FLAGS_DESC 0x2
 /* The value 0x3 is reserved */
@@ -597,7 +597,7 @@ \subsubsection{Implementation Example}\label{sec:Basic Facilities of a Virtio De
 
 Below is a driver code example. It does not attempt to reduce
 the number of available buffer notifications, neither does it support
-the VIRTIO_F_RING_EVENT_IDX feature.
+the VIRTIO_F_EVENT_IDX feature.
 
 \begin{lstlisting}
 /* Note: vq->avail_wrap_count is initialized to 1 */
-- 
2.25.1