[PATCH 1/3] powerpc/tm: Clear the current thread's MSR[TS] after treclaim

[kbuild test robot]

Hi Gustavo,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on scottwood/next v5.5-rc7 next-20200120]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Gustavo-Luiz-Duarte/powerpc-tm-Clear-the-current-thread-s-MSR-TS-after-treclaim/20200118-034925
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-randconfig-a001-20200121 (attached as .config)
compiler: powerpc64le-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp at intel.com>

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/signal_32.c: In function 'handle_rt_signal32':
>> arch/powerpc/kernel/signal_32.c:908:16: error: unused variable 'msr' [-Werror=unused-variable]
     unsigned long msr = regs->msr;
                   ^~~
   arch/powerpc/kernel/signal_32.c: In function 'handle_signal32':
   arch/powerpc/kernel/signal_32.c:1367:16: error: unused variable 'msr' [-Werror=unused-variable]
     unsigned long msr = regs->msr;
                   ^~~
   cc1: all warnings being treated as errors
--
   arch/powerpc/kernel/signal_64.c: In function 'handle_rt_signal64':
>> arch/powerpc/kernel/signal_64.c:821:16: error: unused variable 'msr' [-Werror=unused-variable]
     unsigned long msr = regs->msr;
                   ^~~
   cc1: all warnings being treated as errors

vim +/msr +908 arch/powerpc/kernel/signal_32.c

   891	
   892	/*
   893	 * Set up a signal frame for a "real-time" signal handler
   894	 * (one which gets siginfo).
   895	 */
   896	int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
   897			       struct task_struct *tsk)
   898	{
   899		struct rt_sigframe __user *rt_sf;
   900		struct mcontext __user *frame;
   901		struct mcontext __user *tm_frame = NULL;
   902		void __user *addr;
   903		unsigned long newsp = 0;
   904		int sigret;
   905		unsigned long tramp;
   906		struct pt_regs *regs = tsk->thread.regs;
   907		/* Save the thread's msr before get_tm_stackpointer() changes it */
 > 908		unsigned long msr = regs->msr;
   909	
   910		BUG_ON(tsk != current);
   911	
   912		/* Set up Signal Frame */
   913		/* Put a Real Time Context onto stack */
   914		rt_sf = get_sigframe(ksig, get_tm_stackpointer(tsk), sizeof(*rt_sf), 1);
   915		addr = rt_sf;
   916		if (unlikely(rt_sf == NULL))
   917			goto badframe;
   918	
   919		/* Put the siginfo & fill in most of the ucontext */
   920		if (copy_siginfo_to_user(&rt_sf->info, &ksig->info)
   921		    || __put_user(0, &rt_sf->uc.uc_flags)
   922		    || __save_altstack(&rt_sf->uc.uc_stack, regs->gpr[1])
   923		    || __put_user(to_user_ptr(&rt_sf->uc.uc_mcontext),
   924			    &rt_sf->uc.uc_regs)
   925		    || put_sigset_t(&rt_sf->uc.uc_sigmask, oldset))
   926			goto badframe;
   927	
   928		/* Save user registers on the stack */
   929		frame = &rt_sf->uc.uc_mcontext;
   930		addr = frame;
   931		if (vdso32_rt_sigtramp && tsk->mm->context.vdso_base) {
   932			sigret = 0;
   933			tramp = tsk->mm->context.vdso_base + vdso32_rt_sigtramp;
   934		} else {
   935			sigret = __NR_rt_sigreturn;
   936			tramp = (unsigned long) frame->tramp;
   937		}
   938	

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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