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From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: [printk:rework/printk_safe-removal 1/6] lib/nmi_backtrace.c:106 nmi_cpu_backtrace() error: uninitialized symbol 'flags'.
Date: Tue, 27 Jul 2021 15:56:46 +0800	[thread overview]
Message-ID: <202107271536.Z4IN3DAq-lkp@intel.com> (raw)

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: John Ogness <john.ogness@linutronix.de>
CC: Petr Mladek <pmladek@suse.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/printk/linux.git rework/printk_safe-removal
head:   8d909b2333f37e5da84a9e6a2cbe21f52be5f42a
commit: 55d6af1d66885059ffc2ac23083de52d12be63bb [1/6] lib/nmi_backtrace: explicitly serialize banner and regs
:::::: branch date: 19 hours ago
:::::: commit date: 19 hours ago
config: i386-randconfig-m021-20210726 (attached as .config)
compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

smatch warnings:
lib/nmi_backtrace.c:106 nmi_cpu_backtrace() error: uninitialized symbol 'flags'.

vim +/flags +106 lib/nmi_backtrace.c

160c7ba34605d9 Paul E. McKenney 2020-07-08   91  
b2c0b2cbb282f0 Russell King     2014-09-03   92  bool nmi_cpu_backtrace(struct pt_regs *regs)
b2c0b2cbb282f0 Russell King     2014-09-03   93  {
b2c0b2cbb282f0 Russell King     2014-09-03   94  	int cpu = smp_processor_id();
55d6af1d668850 John Ogness      2021-07-15   95  	unsigned long flags;
b2c0b2cbb282f0 Russell King     2014-09-03   96  
b2c0b2cbb282f0 Russell King     2014-09-03   97  	if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) {
160c7ba34605d9 Paul E. McKenney 2020-07-08   98  		if (!READ_ONCE(backtrace_idle) && regs && cpu_in_idle(instruction_pointer(regs))) {
2f9b7e08cb27d6 Liu, Changcheng  2017-11-17   99  			pr_warn("NMI backtrace for cpu %d skipped: idling at %pS\n",
2f9b7e08cb27d6 Liu, Changcheng  2017-11-17  100  				cpu, (void *)instruction_pointer(regs));
6727ad9e206cc0 Chris Metcalf    2016-10-07  101  		} else {
55d6af1d668850 John Ogness      2021-07-15  102  			/*
55d6af1d668850 John Ogness      2021-07-15  103  			 * Allow nested NMI backtraces while serializing
55d6af1d668850 John Ogness      2021-07-15  104  			 * against other CPUs.
55d6af1d668850 John Ogness      2021-07-15  105  			 */
55d6af1d668850 John Ogness      2021-07-15 @106  			printk_cpu_lock_irqsave(flags);

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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                 reply	other threads:[~2021-07-27  7:56 UTC|newest]

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