doc/ck_pr: Do not cross-reference non-existant functions.

doc/Makefile.in

@@ -107,7 +107,7 @@ all:
 html:
 	for target in $(OBJECTS); do 			   \
 		echo $$target;				   \
-		groff -man -Tascii $(SRC_DIR)/doc/$$target | man2html -noheads -bare -compress -cgiurl='$$title.html' > $(BUILD_DIR)/doc/$$target$(HTML_SUFFIX); \
+		groff -man -Tascii $(SRC_DIR)/doc/$$target | man2html -noheads -bare -cgiurl='$$title.html' > $(BUILD_DIR)/doc/$$target$(HTML_SUFFIX); \
 	done
 
 install:

doc/ck_pr_dec

@@ -76,9 +76,7 @@ family of functions will atomically decrement the value pointed to
 by
 .Fa target .
 .Sh RETURN VALUES
-The
+The ck_pr_dec_zero family of functions will return true if the result
-.Fn ck_pr_dec_*_zero
-family of functions will return true if the result
 of the decrement operation was 0. They will return
 false otherwise.
 .Sh SEE ALSO

doc/ck_pr_inc

@@ -76,10 +76,8 @@ family of functions will atomically increment the value pointed to
 by
 .Fa target .
 .Sh RETURN VALUES
-The
+The ck_pr_inc_zero family of functions will return true
-.Fn ck_pr_inc_*_zero
+if the result of the increment operation was 0. They will return
-family of functions will return true if the result
-of the increment operation was 0. They will return
 false otherwise.
 .Sh SEE ALSO
 .Xr ck_pr_fence_load 3 ,

doc/ck_pr_neg

@@ -76,11 +76,8 @@ family of functions will atomically negation the value pointed to
 by
 .Fa target .
 .Sh RETURN VALUES
-The
+The ck_pr_neg_zero family of functions will return true if the result
-.Fn ck_pr_neg_*_zero
+of the negation operation was 0. They will return false otherwise.
-family of functions will return true if the result
-of the negation operation was 0. They will return
-false otherwise.
 .Sh SEE ALSO
 .Xr ck_pr_fence_load 3 ,
 .Xr ck_pr_fence_load_depends 3 ,