From: Peter Maydell <peter.maydell@linaro.org>
Date: Tue, 15 Dec 2020 15:41:05 +0000 (+0000)
Subject: scripts/coccinelle: New script to remove unnecessary timer_del() calls
X-Git-Tag: v6.0.0-rc0~154^2~13
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=01b3e68bb18d1a37f013ffac41423faa7c00958f;p=thirdparty%2Fqemu.git

scripts/coccinelle: New script to remove unnecessary timer_del() calls

Now that timer_free() implicitly calls timer_del(), sequences
  timer_del(mytimer);
  timer_free(mytimer);

can be simplified to just
  timer_free(mytimer);

Add a Coccinelle script to do this transformation.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201215154107.3255-3-peter.maydell@linaro.org
---

diff --git a/scripts/coccinelle/timer-del-timer-free.cocci b/scripts/coccinelle/timer-del-timer-free.cocci
new file mode 100644
index 00000000000..c3cfd428039
--- /dev/null
+++ b/scripts/coccinelle/timer-del-timer-free.cocci
@@ -0,0 +1,18 @@
+// Remove superfluous timer_del() calls
+//
+// Copyright Linaro Limited 2020
+// This work is licensed under the terms of the GNU GPLv2 or later.
+//
+// spatch --macro-file scripts/cocci-macro-file.h \
+//        --sp-file scripts/coccinelle/timer-del-timer-free.cocci \
+//        --in-place --dir .
+//
+// The timer_free() function now implicitly calls timer_del()
+// for you, so calls to timer_del() immediately before the
+// timer_free() of the same timer can be deleted.
+
+@@
+expression T;
+@@
+-timer_del(T);
+ timer_free(T);