obmc-console: Address bugprone-sizeof-expression

Disable the lint where we know the implementation is valid, but do not
disable it globally.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Ie1640d82138fe91a401188cf966250103a25dde6
diff --git a/ringbuffer.c b/ringbuffer.c
index 48c163a..efa5204 100644
--- a/ringbuffer.c
+++ b/ringbuffer.c
@@ -77,8 +77,14 @@
 	rbc->pos = rb->tail;
 
 	n = rb->n_consumers++;
-	rb->consumers = realloc(rb->consumers,
-				sizeof(*rb->consumers) * rb->n_consumers);
+	/*
+	 * We're managing an array of pointers to aggregates, so don't warn about sizeof() on a
+	 * pointer type.
+	 */
+	/* NOLINTBEGIN(bugprone-sizeof-expression) */
+	rb->consumers = reallocarray(rb->consumers, rb->n_consumers,
+				     sizeof(*rb->consumers));
+	/* NOLINTEND(bugprone-sizeof-expression) */
 	rb->consumers[n] = rbc;
 
 	return rbc;
@@ -97,11 +103,17 @@
 
 	rb->n_consumers--;
 
+	/*
+	 * We're managing an array of pointers to aggregates, so don't warn about sizeof() on a
+	 * pointer type.
+	 */
+	/* NOLINTBEGIN(bugprone-sizeof-expression) */
 	memmove(&rb->consumers[i], &rb->consumers[i + 1],
 		sizeof(*rb->consumers) * (rb->n_consumers - i));
 
-	rb->consumers = realloc(rb->consumers,
-				sizeof(*rb->consumers) * rb->n_consumers);
+	rb->consumers = reallocarray(rb->consumers, rb->n_consumers,
+				     sizeof(*rb->consumers));
+	/* NOLINTEND(bugprone-sizeof-expression) */
 
 	free(rbc);
 }