From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754932AbcDYPgT (ORCPT ); Mon, 25 Apr 2016 11:36:19 -0400 Received: from mout.kundenserver.de ([217.72.192.75]:57707 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754813AbcDYPgP (ORCPT ); Mon, 25 Apr 2016 11:36:15 -0400 From: Arnd Bergmann To: Michal Marek Cc: linux-kbuild@vger.kernel.org, Peter Oberparleiter , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Arnd Bergmann Subject: [PATCH 5/5] gcov: disable -Wmaybe-uninitialized warning Date: Mon, 25 Apr 2016 17:35:31 +0200 Message-Id: <1461598531-2190169-6-git-send-email-arnd@arndb.de> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1461598531-2190169-1-git-send-email-arnd@arndb.de> References: <1461598531-2190169-1-git-send-email-arnd@arndb.de> X-Provags-ID: V03:K0:6ZH49nWA4AnFKrW9bpQJeKOZKTwTDMIVYW27JNYRoDbBbUXZv1c 6XoDd78wHsbD6hZ3nMbcsFiEYsv9mnDrAeUTEiWhAbtvrNPsh9/UddMW/4vwZtUsBkIyKIP oK1++cKpowsaHh8f7Ahw+9LYq3pdhtPqti7shZHz5rCdCkWQmEpNy7BpFIu1mLQUKe5dp14 zkICRU2zz0QdRoQZTe3xw== X-UI-Out-Filterresults: notjunk:1;V01:K0:u2MVsf4UYlI=:joZbaQ0SFymzTGWRN8xP+u ZmdbcbjQvO7uRgSu5cRclVq+mWpIFCE2f/vH5PN9tZNKIG0riytwRQ6S5GR01SocaCKjns/8X HBAA//3OPy83qXHeeRdBT+oAYCs2+8bTKs6yJp4WIwH/13z2CQBYvs//enOFMV85BmIZ1iCCK ldD7b67Xs8o34aIJopuHg72UcDYpemArAHQDxRTkmdwPdcUOI9XkkyvICFV400qbLtTKLnJlb 6PQgXj990g0Af4BXdUC+h2JZU/MOTAl7bekQtrnynS6uCJHophvm1XzlT/esnbtGzSkdWgyQB AtuFrKrIEyuNjeke7ovIeUgnTOY9E/J4n0cKSml+j/Qv8CkA5Q7XRobZl+41/TZ9PJxgr+aK1 46QfEegP/KTSTlOKTjBOEjp7rIjiHhmdP71F6zJ0hGQKrNK8N4FOIhps/p2X5fXuxC1w5wdOp UE9lsnH+mkB4EiA2Hc1LU2JFR3YE+Rsy+NpptI8vnQWk65xZJD5+/MoV8RvweGddna+1t22Q7 wbfMYzDZ43NMOezDVWmMbx7qbnya8yLxUk4RCJnV6129wbsraJGImE5HFnt0kd9b0Aj6uFavm PsXLkEY5nOhuYi9gAQjSeSiSGh3sqLZxEDIW/YiGGgU3ZDUQif65DLQitFrdczqwegFNKmKRw CZClpyyPi4HYOKJT8ckU3dcNxNZxeIqBBq4lf6RuToCAqIKDlLDKTwzq0VN/NMYRUur0= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When gcov profiling is enabled, we see a lot of spurious warnings about possibly uninitialized variables being used: arch/arm/mm/dma-mapping.c: In function 'arm_coherent_iommu_map_page': arch/arm/mm/dma-mapping.c:1085:16: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/clk/st/clk-flexgen.c: In function 'st_of_flexgen_setup': drivers/clk/st/clk-flexgen.c:323:9: warning: 'num_parents' may be used uninitialized in this function [-Wmaybe-uninitialized] kernel/cgroup.c: In function 'cgroup_mount': kernel/cgroup.c:2119:11: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized] All of these are false positives, so it seems better to just disable the warnings whenever GCOV is enabled. Most users don't enable GCOV, and based on a prior patch, it is now also disabled for 'allmodconfig' builds, so there should be no downsides of doing this. Signed-off-by: Arnd Bergmann Acked-by: Peter Oberparleiter --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index d74b38e70d6f..b5c67617a98d 100644 --- a/Makefile +++ b/Makefile @@ -364,7 +364,7 @@ AFLAGS_MODULE = LDFLAGS_MODULE = CFLAGS_KERNEL = AFLAGS_KERNEL = -CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im +CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized CFLAGS_KCOV = -fsanitize-coverage=trace-pc -- 2.7.0