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2023 23:23:41 +0000 Date: Fri, 20 Oct 2023 07:23:31 +0800 From: Philip Li To: Heiko Carstens CC: kernel test robot , Andrew Morton , Linux Memory Management List , , , , , , , , , Subject: Re: [linux-next:master] BUILD REGRESSION 2dac75696c6da3c848daa118a729827541c89d33 Message-ID: References: <202310190456.pryB092r-lkp@intel.com> <20231019153205.9160-A-hca@linux.ibm.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20231019153205.9160-A-hca@linux.ibm.com> X-ClientProxiedBy: SG2PR04CA0160.apcprd04.prod.outlook.com (2603:1096:4::22) To BL0PR11MB2995.namprd11.prod.outlook.com (2603:10b6:208:7a::28) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL0PR11MB2995:EE_|BN9PR11MB5545:EE_ X-MS-Office365-Filtering-Correlation-Id: bfe60795-c231-43ea-4313-08dbd0fa6e3d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 K7WaA0Ud 1GqG3cePIbw9G0qFTat6NOzurk9b8xdFXMsXOUmBRdOZr/z8C/MV3ZoRq29XHi6hOcZ03lAvvPVNql8GCZUgexFQVXzRcnGCgnX0oURdCgFNBI+jvE0TfdCK2MYO8TP+OJF0LTKyDK6R93WYRaCKjEm+UK4ywa54OPSqCJAWzz6kLvTl1cOLc50i4ybyaaJV/UGXRuMbcWw99RY1auzSGolWB1eCOC2fDpQWPyNSG3Q5c49ARl0R/DHTqxjtRM7dwiwKRqT3Id9X5unQ1e8Uy5NxgHA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000019, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Oct 19, 2023 at 05:32:05PM +0200, Heiko Carstens wrote: > On Thu, Oct 19, 2023 at 04:07:35AM +0800, kernel test robot wrote: > > arch/s390/include/asm/ctlreg.h:129:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] > > arch/s390/include/asm/ctlreg.h:80:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] > ... > > |-- s390-defconfig > > | `-- arch-s390-include-asm-ctlreg.h:warning:array-subscript-is-outside-array-bounds-of-struct-ctlreg > ... > > s390 defconfig gcc > > I'm wondering how this warning can appear in the builds. array-bounds > warnings are explicitly disabled, see init/Kconfig: CC_NO_ARRAY_BOUNDS. And > as expected, if I compile the kernel with gcc, defconfig, and with or > without W=1 the option -Wno-array-bounds is passed to the compiler. > > And also as expected I do not see the above warnings. > > So something is quite odd here. Sorry about this Heiko, this is a bug in the bot that it wrongly ignores the CC_NO_ARRAY_BOUNDS config and always test with -Warray-bounds. We will fix this asap. >