[ihalip:KSPP20 1/1] arch/x86/kvm/svm/svm.c:115:13: error: static declaration of 'npt_enabled' follows non-static declaration

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

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tree:   https://github.com/ihalip/linux KSPP20
head:   7cf3fadf5610fa720dcd292d550c2106162983f6
commit: 7cf3fadf5610fa720dcd292d550c2106162983f6 [1/1] mark some variables as __ro_after_init
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        git checkout 7cf3fadf5610fa720dcd292d550c2106162983f6
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

All errors (new ones prefixed by >>):

>> arch/x86/kvm/svm/svm.c:115:13: error: static declaration of 'npt_enabled' follows non-static declaration
    static bool npt_enabled __ro_after_init = true;
                ^~~~~~~~~~~
   In file included from arch/x86/kvm/svm/svm.c:42:0:
   arch/x86/kvm/svm/svm.h:36:13: note: previous declaration of 'npt_enabled' was here
    extern bool npt_enabled;
                ^~~~~~~~~~~

cppcheck warnings: (new ones prefixed by >>)

   arch/x86/kernel/apic/x2apic_uv_x.c:1283:22: warning: Either the condition 'order<sizeof(suffix)' is redundant or the array 'suffix[8]' is accessed at index 8, which is out of bounds. [arrayIndexOutOfBoundsCond]
      flag, size, suffix[order],
                        ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1265:31: note: Assuming that condition 'order<sizeof(suffix)' is not redundant
     while (size > 9999 && order < sizeof(suffix)) {
                                 ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1283:22: note: Array index out of bounds
      flag, size, suffix[order],
                        ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1366:25: warning: The statement 'if (uv_possible_blades!=uv_pb) uv_possible_blades=uv_pb' is logically equivalent to 'uv_possible_blades=uv_pb'. [duplicateConditionalAssign]
    if (uv_possible_blades != uv_pb)
                           ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1367:22: note: Assignment 'uv_possible_blades=uv_pb'
     uv_possible_blades = uv_pb;
                        ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1366:25: note: Condition 'uv_possible_blades!=uv_pb' is redundant
    if (uv_possible_blades != uv_pb)
                           ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1616:4: warning: Either the condition '!new_hub' is redundant or there is possible null pointer dereference: new_hub. [nullPointerRedundantCheck]
     *new_hub = hub_info;
      ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1615:10: note: Assuming that condition '!new_hub' is not redundant
     BUG_ON(!new_hub);
            ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1614:29: note: Assignment 'new_hub=uv_hub_info_list(nodeid)', assigned value is 0
     new_hub = uv_hub_info_list(nodeid);
                               ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1616:4: note: Null pointer dereference
     *new_hub = hub_info;
      ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1448:12: warning: Variable 'lnid' is reassigned a value before the old one has been used. [redundantAssignment]
    for (lnid = 0; lnid < num_possible_nodes(); lnid++) {
              ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1435:8: note: lnid is assigned
     lnid = nid;
          ^
   arch/x86/kernel/apic/x2apic_uv_x.c:1448:12: note: lnid is overwritten
    for (lnid = 0; lnid < num_possible_nodes(); lnid++) {
              ^
   arch/x86/kernel/apic/x2apic_uv_x.c:232:31: warning: Shifting a negative value is technically undefined behaviour [shiftNegativeLHS]
    uv_cpuid.apicid_mask = (~(-1 << sid_shift));
                                 ^
>> arch/x86/kernel/apic/x2apic_uv_x.c:254:47: warning: Local variable 'apicid_mask' shadows outer variable [shadowVariable]
    union uv1h_lb_target_physical_apic_id_mask_u apicid_mask;
                                                 ^
   arch/x86/kernel/apic/x2apic_uv_x.c:48:15: note: Shadowed declaration
    unsigned int apicid_mask;
                 ^
   arch/x86/kernel/apic/x2apic_uv_x.c:254:47: note: Shadow variable
    union uv1h_lb_target_physical_apic_id_mask_u apicid_mask;
                                                 ^

vim +/npt_enabled +115 arch/x86/kvm/svm/svm.c

   112	
   113	/* enable NPT for AMD64 and X86 with PAE */
   114	#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
 > 115	static bool npt_enabled __ro_after_init = true;
   116	#else
   117	static bool npt_enabled __ro_after_init;
   118	#endif
   119	

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

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