[PATCH -perfbook 4/5] toyrcu: Replace \co{} with \cref{}

Trivial typo fix.

Signed-off-by: Akira Yokosawa <[email protected]>
---
 appendix/toyrcu/toyrcu.tex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/appendix/toyrcu/toyrcu.tex b/appendix/toyrcu/toyrcu.tex
index cfd6fcb6..e19b2408 100644
--- a/appendix/toyrcu/toyrcu.tex
+++ b/appendix/toyrcu/toyrcu.tex
@@ -861,7 +861,7 @@ grace periods, preventing grace-period sharing.
 
 Fourth, the need to consult \co{rcu_idx} slows readers slightly compared
 to the implementation presented in
-\co{sec:app:toyrcu:Scalable Single-Counter RCU}.
+\cref{sec:app:toyrcu:Scalable Single-Counter RCU}.
 
 Finally, as noted in the text, the need for per-thread variables
 and for enumerating threads may be problematic in some software
-- 
2.43.0