plugins: Iterate on cb_lists in qemu_plugin_user_exit

Rather than iterate over all plugins for all events,
iterate over plugins that have registered a given event.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230117035701.168514-4-richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230124180127.1881110-36-alex.bennee@linaro.org>

diff --git a/plugins/core.c b/plugins/core.c
index 728bacef95f17ef443e0f1b66dc996f74d692783..e04ffa1ba41bf26243f49d3b4f651780f005218c 100644 (file)
--- a/plugins/core.c
+++ b/plugins/core.c
@@ -514,9 +514,10 @@ void qemu_plugin_user_exit(void)
     /* un-register all callbacks except the final AT_EXIT one */
     for (ev = 0; ev < QEMU_PLUGIN_EV_MAX; ev++) {
         if (ev != QEMU_PLUGIN_EV_ATEXIT) {
-            struct qemu_plugin_ctx *ctx;
-            QTAILQ_FOREACH(ctx, &plugin.ctxs, entry) {
-                plugin_unregister_cb__locked(ctx, ev);
+            struct qemu_plugin_cb *cb, *next;
+
+            QLIST_FOREACH_SAFE_RCU(cb, &plugin.cb_lists[ev], entry, next) {
+                plugin_unregister_cb__locked(cb->ctx, ev);
             }
         }
     }