arch/arm64/kvm/sys_regs.c:2786:23: warning: Uninitialized variable: clidr [uninitvar]

[kernel test robot <lkp@intel.com>]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Peter Zijlstra <peterz@infradead.org>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1d67c8d993baf8ab6be8a2154b1a94ec1311c869
commit: 63b3f96e1a989846a5a521d4fbef4bc86406929d kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT
date:   10 weeks ago
:::::: branch date: 16 hours ago
:::::: commit date: 10 weeks ago
compiler: aarch64-linux-gcc (GCC) 10.3.0

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


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> arch/arm64/kvm/sys_regs.c:2786:23: warning: Uninitialized variable: clidr [uninitvar]
    get_clidr_el1(NULL, &clidr); /* Ugly... */
                         ^
>> arch/arm64/kvm/sys_regs.c:2787:17: warning: Uninitialized struct member: clidr.val [uninitStructMember]
    cache_levels = clidr.val;
                   ^

vim +2786 arch/arm64/kvm/sys_regs.c

7c8c5e6a9101ea Marc Zyngier 2012-12-10  2758  
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2759  void kvm_sys_reg_table_init(void)
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2760  {
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2761  	unsigned int i;
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2762  	struct sys_reg_desc clidr;
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2763  
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2764  	/* Make sure tables are unique and in order. */
bb44a8dbea259b Marc Zyngier 2020-01-27  2765  	BUG_ON(check_sysreg_table(sys_reg_descs, ARRAY_SIZE(sys_reg_descs), false));
bb44a8dbea259b Marc Zyngier 2020-01-27  2766  	BUG_ON(check_sysreg_table(cp14_regs, ARRAY_SIZE(cp14_regs), true));
bb44a8dbea259b Marc Zyngier 2020-01-27  2767  	BUG_ON(check_sysreg_table(cp14_64_regs, ARRAY_SIZE(cp14_64_regs), true));
bb44a8dbea259b Marc Zyngier 2020-01-27  2768  	BUG_ON(check_sysreg_table(cp15_regs, ARRAY_SIZE(cp15_regs), true));
bb44a8dbea259b Marc Zyngier 2020-01-27  2769  	BUG_ON(check_sysreg_table(cp15_64_regs, ARRAY_SIZE(cp15_64_regs), true));
bb44a8dbea259b Marc Zyngier 2020-01-27  2770  	BUG_ON(check_sysreg_table(invariant_sys_regs, ARRAY_SIZE(invariant_sys_regs), false));
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2771  
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2772  	/* We abuse the reset function to overwrite the table itself. */
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2773  	for (i = 0; i < ARRAY_SIZE(invariant_sys_regs); i++)
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2774  		invariant_sys_regs[i].reset(NULL, &invariant_sys_regs[i]);
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2775  
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2776  	/*
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2777  	 * CLIDR format is awkward, so clean it up.  See ARM B4.1.20:
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2778  	 *
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2779  	 *   If software reads the Cache Type fields from Ctype1
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2780  	 *   upwards, once it has seen a value of 0b000, no caches
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2781  	 *   exist at further-out levels of the hierarchy. So, for
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2782  	 *   example, if Ctype3 is the first Cache Type field with a
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2783  	 *   value of 0b000, the values of Ctype4 to Ctype7 must be
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2784  	 *   ignored.
7c8c5e6a9101ea Marc Zyngier 2012-12-10  2785  	 */
7c8c5e6a9101ea Marc Zyngier 2012-12-10 @2786  	get_clidr_el1(NULL, &clidr); /* Ugly... */
7c8c5e6a9101ea Marc Zyngier 2012-12-10 @2787  	cache_levels = clidr.val;

:::::: The code@line 2786 was first introduced by commit
:::::: 7c8c5e6a9101ea57a1c2c9faff0917e79251a21e arm64: KVM: system register handling

:::::: TO: Marc Zyngier <marc.zyngier@arm.com>
:::::: CC: Marc Zyngier <marc.zyngier@arm.com>

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