diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e461a06383..0c5fe7c804 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2019-05-08  Tom Tromey  <tom@tromey.com>
+
+	* break-catch-syscall.c (catch_syscall_inferior_data): Move.
+	Change type.
+	(get_catch_syscall_inferior_data): Update.
+	(catch_syscall_inferior_data_cleanup): Remove.
+	(_initialize_break_catch_syscall): Update.
+
 2019-05-08  Tom Tromey  <tom@tromey.com>
 
 	* inflow.c (struct terminal_info): Add destructor and
diff --git a/gdb/break-catch-syscall.c b/gdb/break-catch-syscall.c
index 6a911fbc2a..cd4870f7f5 100644
--- a/gdb/break-catch-syscall.c
+++ b/gdb/break-catch-syscall.c
@@ -42,8 +42,6 @@ struct syscall_catchpoint : public breakpoint
   std::vector<int> syscalls_to_be_caught;
 };
 
-static const struct inferior_data *catch_syscall_inferior_data = NULL;
-
 struct catch_syscall_inferior_data
 {
   /* We keep a count of the number of times the user has requested a
@@ -61,31 +59,21 @@ struct catch_syscall_inferior_data
   int total_syscalls_count;
 };
 
+static const struct inferior_key<struct catch_syscall_inferior_data>
+  catch_syscall_inferior_data;
+
 static struct catch_syscall_inferior_data *
 get_catch_syscall_inferior_data (struct inferior *inf)
 {
   struct catch_syscall_inferior_data *inf_data;
 
-  inf_data = ((struct catch_syscall_inferior_data *)
-	      inferior_data (inf, catch_syscall_inferior_data));
+  inf_data = catch_syscall_inferior_data.get (inf);
   if (inf_data == NULL)
-    {
-      inf_data = new struct catch_syscall_inferior_data ();
-      set_inferior_data (inf, catch_syscall_inferior_data, inf_data);
-    }
+    inf_data = catch_syscall_inferior_data.emplace (inf);
 
   return inf_data;
 }
 
-static void
-catch_syscall_inferior_data_cleanup (struct inferior *inf, void *arg)
-{
-  struct catch_syscall_inferior_data *inf_data
-    = (struct catch_syscall_inferior_data *) arg;
-  delete inf_data;
-}
-
-
 /* Implement the "insert" breakpoint_ops method for syscall
    catchpoints.  */
 
@@ -617,9 +605,6 @@ _initialize_break_catch_syscall (void)
   initialize_syscall_catchpoint_ops ();
 
   gdb::observers::inferior_exit.attach (clear_syscall_counts);
-  catch_syscall_inferior_data
-    = register_inferior_data_with_cleanup (NULL,
-					   catch_syscall_inferior_data_cleanup);
 
   add_catch_command ("syscall", _("\
 Catch system calls by their names, groups and/or numbers.\n\