From: kernel test robot <lkp@intel.com>
To: Yeoreum Yun <yeoreum.yun@arm.com>,
ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com,
dvyukov@google.com, vincenzo.frascino@arm.com, corbet@lwn.net,
catalin.marinas@arm.com, will@kernel.org,
akpm@linux-foundation.org, scott@os.amperecomputing.com,
jhubbard@nvidia.com, pankaj.gupta@amd.com, leitao@debian.org,
kaleshsingh@google.com, maz@kernel.org, broonie@kernel.org,
oliver.upton@linux.dev, james.morse@arm.com, ardb@kernel.org,
hardevsinh.palaniya@siliconsignals.io, david@redhat.com,
yang@os.amperecomputing.com
Cc: oe-kbuild-all@lists.linux.dev, kasan-dev@googlegroups.com,
workflows@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
Yeoreum Yun <yeoreum.yun@arm.com>
Subject: Re: [PATCH v3 1/2] kasan/hw-tags: introduce kasan.write_only option
Date: Mon, 18 Aug 2025 08:13:56 +0800 [thread overview]
Message-ID: <202508180747.PxkbPnyA-lkp@intel.com> (raw)
In-Reply-To: <20250816110018.4055617-2-yeoreum.yun@arm.com>
Hi Yeoreum,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 8f5ae30d69d7543eee0d70083daf4de8fe15d585]
url: https://github.com/intel-lab-lkp/linux/commits/Yeoreum-Yun/kasan-hw-tags-introduce-kasan-write_only-option/20250816-190300
base: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
patch link: https://lore.kernel.org/r/20250816110018.4055617-2-yeoreum.yun%40arm.com
patch subject: [PATCH v3 1/2] kasan/hw-tags: introduce kasan.write_only option
config: arm64-randconfig-r053-20250818 (https://download.01.org/0day-ci/archive/20250818/202508180747.PxkbPnyA-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250818/202508180747.PxkbPnyA-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508180747.PxkbPnyA-lkp@intel.com/
All warnings (new ones prefixed by >>):
mm/kasan/hw_tags.c: In function 'kasan_enable_hw_tags':
>> mm/kasan/hw_tags.c:433:21: warning: comparison between 'enum kasan_arg_mode' and 'enum kasan_arg_write_only' [-Wenum-compare]
433 | if (kasan_arg_mode == KASAN_ARG_WRITE_ONLY_ON &&
| ^~
mm/kasan/hw_tags.c:435:18: warning: comparison between 'enum kasan_arg_mode' and 'enum kasan_arg_write_only' [-Wenum-compare]
435 | kasan_arg_mode == KASAN_ARG_WRITE_ONLY_OFF;
| ^~
>> mm/kasan/hw_tags.c:435:18: warning: statement with no effect [-Wunused-value]
435 | kasan_arg_mode == KASAN_ARG_WRITE_ONLY_OFF;
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +433 mm/kasan/hw_tags.c
423
424 void kasan_enable_hw_tags(void)
425 {
426 if (kasan_arg_mode == KASAN_ARG_MODE_ASYNC)
427 hw_enable_tag_checks_async();
428 else if (kasan_arg_mode == KASAN_ARG_MODE_ASYMM)
429 hw_enable_tag_checks_asymm();
430 else
431 hw_enable_tag_checks_sync();
432
> 433 if (kasan_arg_mode == KASAN_ARG_WRITE_ONLY_ON &&
434 hw_enable_tag_checks_write_only()) {
> 435 kasan_arg_mode == KASAN_ARG_WRITE_ONLY_OFF;
436 kasan_flag_write_only = false;
437 pr_warn_once("System doesn't support write-only option. Disable it\n");
438 }
439 }
440
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2025-08-18 0:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-16 11:00 [PATCH v3 0/2] introduce kasan.write_only option in hw-tags Yeoreum Yun
2025-08-16 11:00 ` [PATCH v3 1/2] kasan/hw-tags: introduce kasan.write_only option Yeoreum Yun
2025-08-18 0:13 ` kernel test robot [this message]
2025-08-18 7:18 ` Yeoreum Yun
2025-08-16 11:00 ` [PATCH v3 2/2] kasan: apply write-only mode in kasan kunit testcases Yeoreum Yun
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