From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33179) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cX8dX-0002Ne-Sl for qemu-devel@nongnu.org; Fri, 27 Jan 2017 10:40:28 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cX8dV-0007iF-W8 for qemu-devel@nongnu.org; Fri, 27 Jan 2017 10:40:27 -0500 Received: from mail-wm0-x243.google.com ([2a00:1450:400c:c09::243]:33214) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cX8dV-0007hj-Ps for qemu-devel@nongnu.org; Fri, 27 Jan 2017 10:40:25 -0500 Received: by mail-wm0-x243.google.com with SMTP id r144so59111734wme.0 for ; Fri, 27 Jan 2017 07:40:25 -0800 (PST) Sender: Paolo Bonzini From: Paolo Bonzini Date: Fri, 27 Jan 2017 16:40:12 +0100 Message-Id: <1485531620-121182-2-git-send-email-pbonzini@redhat.com> In-Reply-To: <1485531620-121182-1-git-send-email-pbonzini@redhat.com> References: <1485531620-121182-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH 1/9] memory: make memory_listener_unregister idempotent List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: mst@redhat.com Make it easy to unregister a MemoryListener without tracking whether it had been registered before. Signed-off-by: Paolo Bonzini --- v3: new memory.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/memory.c b/memory.c index 2bfc37f..8fafd4c 100644 --- a/memory.c +++ b/memory.c @@ -2371,8 +2371,13 @@ void memory_listener_register(MemoryListener *listener, AddressSpace *as) void memory_listener_unregister(MemoryListener *listener) { + if (!listener->address_space) { + return; + } + QTAILQ_REMOVE(&memory_listeners, listener, link); QTAILQ_REMOVE(&listener->address_space->listeners, listener, link_as); + listener->address_space = NULL; } void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name) -- 1.8.3.1