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[80.218.24.251]) by smtp.gmail.com with ESMTPSA id g138sm4216048wme.39.2020.11.20.05.34.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Nov 2020 05:34:02 -0800 (PST) Date: Fri, 20 Nov 2020 14:34:00 +0100 From: Salvatore Bonaccorso To: Andrey Zhizhikin Subject: Re: [PATCH] Revert "perf cs-etm: Move definition of 'traceid_list' global variable from header file" Message-ID: <20201120133400.GA405401@eldamar.lan> References: <20201120073909.357536-1-carnil@debian.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201120_083405_734123_2F3A3FDB X-CRM114-Status: GOOD ( 15.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Suzuki Poulouse , Alexander Shishkin , Greg Kroah-Hartman , stable@vger.kernel.org, Tor Jeremiassen , Arnaldo Carvalho de Melo , Peter Zijlstra , Guenter Roeck , Leo Yan , Namhyung Kim , Jiri Olsa , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Andrey, On Fri, Nov 20, 2020 at 10:54:22AM +0100, Andrey Zhizhikin wrote: > On Fri, Nov 20, 2020 at 8:39 AM Salvatore Bonaccorso wrote: > > > > This reverts commit 168200b6d6ea0cb5765943ec5da5b8149701f36a upstream. > > (but only from 4.19.y) > > This revert would fail the build of 4.19.y with gcc10, I believe the > original commit was introduced to address exactly this case. If this > is intended behavior that 4.19.y is not compiled with newer gcc > versions - then this revert is OK. TTBOMK, this would not regress the build for newer gcc (specifically gcc10) as 4.19.158 is failing perf tool builds there as well (without the above commit reverted). Just as an example v4.19.y does not have cff20b3151cc ("perf tests bp_account: Make global variable static") which is there in v5.6-rc6 to fix build failures with 10.0.1. But it did regress builds with older gcc's as for instance used in Debian buster (gcc 8.3.0) since 4.19.152. Do I possibly miss something? If there is a solution to make it build with newer GCCs and *not* regress previously working GCC versions then this is surely the best outcome though. Regards, Salvatore _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel