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Thu, 13 Aug 2020 05:02:50 -0700 (PDT) Date: Thu, 13 Aug 2020 14:02:49 +0200 From: Luc Van Oostenryck To: Valentin Schneider Subject: Re: [PATCH v5 06/17] sched/debug: Output SD flag names rather than their values Message-ID: <20200813120249.vdadn3nutkx3mq7y@ltop.local> References: <20200812125300.11889-7-valentin.schneider@arm.com> <202008130025.XjiXqp1O%lkp@intel.com> 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-20200813_080257_463621_416E44E9 X-CRM114-Status: GOOD ( 14.84 ) 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: morten.rasmussen@arm.com, kbuild-all@lists.01.org, kernel test robot , Quentin Perret , peterz@infradead.org, linux-kernel@vger.kernel.org, dietmar.eggemann@arm.com, vincent.guittot@linaro.org, mingo@kernel.org, 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 On Wed, Aug 12, 2020 at 07:51:08PM +0100, Valentin Schneider wrote: > On 12/08/20 17:35, kernel test robot wrote: > > > config: i386-randconfig-s001-20200811 (attached as .config) > > reproduce: > > # sparse version: v0.6.2-168-g9554805c-dirty > > make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 > > > >>> kernel/sched/debug.c:279:17: sparse: sparse: non size-preserving pointer to integer cast > >>> kernel/sched/debug.c:279:17: sparse: sparse: non size-preserving integer to pointer cast > > > > > 279 tmp += *ppos; > > I pretty much copied kernel/sysctl.c::_proc_do_string() and I think that's > exactly the same types here: char* buffer incremented by loff_t offset. It > does look fine to me, but I can't really parse that warning. The warnings mean that there is a cast from a pointer to an integer with a size other than the size of a pointer and the other way around. I's indeed the case here, on i386, where pointers are 32-bit and loff_t is 64-bit. But yes, I agree: 1) these messages are far from clear 2) these casts are internal and are probably not appropriate here. I'll look later what can be done at sparse level. Regards, -- Luc _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel