From: kernel test robot <lkp@intel.com>
To: "Thomas Weißschuh " <thomas.weissschuh@linutronix.de>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: [thomas-weissschuh:b4/kunit-kselftests 3/18] arch/arm/kernel/signal.c:143:15: error: variable 'aux' set but not used
Date: Thu, 26 Mar 2026 11:18:17 +0800 [thread overview]
Message-ID: <202603261127.DR8KsiwA-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/kunit-kselftests
head: 6816331cc815bfc31edb2ff1aaad0d882f0bf92b
commit: fb3ab97786e927b684927c71a78479a10f6d2995 [3/18] run-tests
config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20260326/202603261127.DR8KsiwA-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 054e11d1a17e5ba88bb1a8ef32fad3346e80b186)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260326/202603261127.DR8KsiwA-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/202603261127.DR8KsiwA-lkp@intel.com/
All errors (new ones prefixed by >>):
>> arch/arm/kernel/signal.c:143:15: error: variable 'aux' set but not used [-Werror,-Wunused-but-set-variable]
143 | char __user *aux;
| ^
1 error generated.
vim +/aux +143 arch/arm/kernel/signal.c
82c6f5a5b3e91e Imre Deak 2010-04-11 135
^1da177e4c3f41 Linus Torvalds 2005-04-16 136 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 137 * Do a signal return; undo the signal stack. These are aligned to 64-bit.
^1da177e4c3f41 Linus Torvalds 2005-04-16 138 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 139
680714844fd1dc Russell King 2006-06-15 140 static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
^1da177e4c3f41 Linus Torvalds 2005-04-16 141 {
c32cd419d6650e Russell King 2018-07-09 142 struct sigcontext context;
ce184a0dee92a0 Dave Martin 2017-06-30 @143 char __user *aux;
680714844fd1dc Russell King 2006-06-15 144 sigset_t set;
680714844fd1dc Russell King 2006-06-15 145 int err;
680714844fd1dc Russell King 2006-06-15 146
680714844fd1dc Russell King 2006-06-15 147 err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
77097ae503b170 Al Viro 2012-04-27 148 if (err == 0)
101d9b0dedbc9e Matt Fleming 2012-03-05 149 set_current_blocked(&set);
^1da177e4c3f41 Linus Torvalds 2005-04-16 150
c32cd419d6650e Russell King 2018-07-09 151 err |= __copy_from_user(&context, &sf->uc.uc_mcontext, sizeof(context));
c32cd419d6650e Russell King 2018-07-09 152 if (err == 0) {
c32cd419d6650e Russell King 2018-07-09 153 regs->ARM_r0 = context.arm_r0;
c32cd419d6650e Russell King 2018-07-09 154 regs->ARM_r1 = context.arm_r1;
c32cd419d6650e Russell King 2018-07-09 155 regs->ARM_r2 = context.arm_r2;
c32cd419d6650e Russell King 2018-07-09 156 regs->ARM_r3 = context.arm_r3;
c32cd419d6650e Russell King 2018-07-09 157 regs->ARM_r4 = context.arm_r4;
c32cd419d6650e Russell King 2018-07-09 158 regs->ARM_r5 = context.arm_r5;
c32cd419d6650e Russell King 2018-07-09 159 regs->ARM_r6 = context.arm_r6;
c32cd419d6650e Russell King 2018-07-09 160 regs->ARM_r7 = context.arm_r7;
c32cd419d6650e Russell King 2018-07-09 161 regs->ARM_r8 = context.arm_r8;
c32cd419d6650e Russell King 2018-07-09 162 regs->ARM_r9 = context.arm_r9;
c32cd419d6650e Russell King 2018-07-09 163 regs->ARM_r10 = context.arm_r10;
c32cd419d6650e Russell King 2018-07-09 164 regs->ARM_fp = context.arm_fp;
c32cd419d6650e Russell King 2018-07-09 165 regs->ARM_ip = context.arm_ip;
c32cd419d6650e Russell King 2018-07-09 166 regs->ARM_sp = context.arm_sp;
c32cd419d6650e Russell King 2018-07-09 167 regs->ARM_lr = context.arm_lr;
c32cd419d6650e Russell King 2018-07-09 168 regs->ARM_pc = context.arm_pc;
c32cd419d6650e Russell King 2018-07-09 169 regs->ARM_cpsr = context.arm_cpsr;
c32cd419d6650e Russell King 2018-07-09 170 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 171
^1da177e4c3f41 Linus Torvalds 2005-04-16 172 err |= !valid_user_regs(regs);
^1da177e4c3f41 Linus Torvalds 2005-04-16 173
ce184a0dee92a0 Dave Martin 2017-06-30 174 aux = (char __user *) sf->uc.uc_regspace;
^1da177e4c3f41 Linus Torvalds 2005-04-16 175 #ifdef CONFIG_IWMMXT
ce184a0dee92a0 Dave Martin 2017-06-30 176 if (err == 0)
ce184a0dee92a0 Dave Martin 2017-06-30 177 err |= restore_iwmmxt_context(&aux);
^1da177e4c3f41 Linus Torvalds 2005-04-16 178 #endif
^1da177e4c3f41 Linus Torvalds 2005-04-16 179 #ifdef CONFIG_VFP
82c6f5a5b3e91e Imre Deak 2010-04-11 180 if (err == 0)
ce184a0dee92a0 Dave Martin 2017-06-30 181 err |= restore_vfp_context(&aux);
^1da177e4c3f41 Linus Torvalds 2005-04-16 182 #endif
^1da177e4c3f41 Linus Torvalds 2005-04-16 183
^1da177e4c3f41 Linus Torvalds 2005-04-16 184 return err;
^1da177e4c3f41 Linus Torvalds 2005-04-16 185 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 186
:::::: The code at line 143 was first introduced by commit
:::::: ce184a0dee92a0a333236a26478e304dca29a3df ARM: 8687/1: signal: Fix unparseable iwmmxt_sigframe in uc_regspace[]
:::::: TO: Dave Martin <Dave.Martin@arm.com>
:::::: CC: Russell King <rmk+kernel@armlinux.org.uk>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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