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Wed, 25 Mar 2026 04:23:35 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4871174f2cesm125063335e9.10.2026.03.25.04.23.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Mar 2026 04:23:34 -0700 (PDT) Date: Wed, 25 Mar 2026 14:23:31 +0300 From: Dan Carpenter To: oe-kbuild@lists.linux.dev, Charlie Jenkins Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Thomas Gleixner , Alexandre Ghiti Subject: arch/s390/include/asm/syscall.h:23 syscall_get_nr() warn: check sign expansion for '-1' Message-ID: <202603251953.xOfBpOhW-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: bbeb83d3182abe0d245318e274e8531e5dd7a948 commit: e43b8bb56e537bfc8d9076793091e7679020fc9c entry: Inline syscall_exit_to_user_mode() config: s390-randconfig-r072-20260325 (https://download.01.org/0day-ci/archive/20260325/202603251953.xOfBpOhW-lkp@intel.com/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 054e11d1a17e5ba88bb1a8ef32fad3346e80b186) smatch: v0.5.0-9004-gb810ac53 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 | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202603251953.xOfBpOhW-lkp@intel.com/ smatch warnings: arch/s390/include/asm/syscall.h:23 syscall_get_nr() warn: check sign expansion for '-1' vim +23 arch/s390/include/asm/syscall.h 753c4dd6a2fa2a Martin Schwidefsky 2008-10-10 20 static inline long syscall_get_nr(struct task_struct *task, 753c4dd6a2fa2a Martin Schwidefsky 2008-10-10 21 struct pt_regs *regs) 753c4dd6a2fa2a Martin Schwidefsky 2008-10-10 22 { d3a73acbc26a4a Martin Schwidefsky 2014-04-15 @23 return test_pt_regs_flag(regs, PIF_SYSCALL) ? aa33c8cbbae2eb Martin Schwidefsky 2011-12-27 24 (regs->int_code & 0xffff) : -1; regs->int_code is a u32, so the -1 becomes UINT_MAX where -1 was obviously intended. Maybe change the function to return int or change the -1 to -1L? 753c4dd6a2fa2a Martin Schwidefsky 2008-10-10 25 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki