From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967732AbdEZMp3 (ORCPT ); Fri, 26 May 2017 08:45:29 -0400 Received: from mx2.suse.de ([195.135.220.15]:45112 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1763624AbdEZMp0 (ORCPT ); Fri, 26 May 2017 08:45:26 -0400 From: Miroslav Benes To: jpoimboe@redhat.com, jeyu@redhat.com, jikos@kernel.org Cc: mmarek@suse.com, pmladek@suse.com, jmoreira@suse.de, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org, Miroslav Benes Subject: [PATCH] livepatch: Make livepatch dependent on !TRIM_UNUSED_KSYMS Date: Fri, 26 May 2017 14:45:21 +0200 Message-Id: <20170526124521.28592-1-mbenes@suse.cz> X-Mailer: git-send-email 2.12.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If TRIM_UNUSED_KSYMS is enabled, all unneeded exported symbols are made unexported. Two-pass build of the kernel is done to find out which symbols are needed based on a configuration. This effectively complicates things for out-of-tree modules. Livepatch exports functions to (un)register and enable/disable a live patch. The only in-tree module which uses these functions is a sample in samples/livepatch/. If the sample is disabled, the functions are trimmed and out-of-tree live patches cannot be built. Note that live patches are intended to be built out-of-tree. Suggested-by: Michal Marek Signed-off-by: Miroslav Benes --- kernel/livepatch/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/livepatch/Kconfig b/kernel/livepatch/Kconfig index 045022557936..ec4565122e65 100644 --- a/kernel/livepatch/Kconfig +++ b/kernel/livepatch/Kconfig @@ -10,6 +10,7 @@ config LIVEPATCH depends on SYSFS depends on KALLSYMS_ALL depends on HAVE_LIVEPATCH + depends on !TRIM_UNUSED_KSYMS help Say Y here if you want to support kernel live patching. This option has no runtime impact until a kernel "patch" -- 2.12.2