[char-misc:char-misc-testing 25/45] drivers/hv/vmbus_drv.c:67:9: sparse: constant 0x8000000000000000 is so big it is unsigned long

[kbuild test robot]

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 
char-misc-testing
head:   b3de8e3719e582f3182bb504295e4a8e43c8c96f
commit: 96c1d0581d00f7abe033350edb021a9d947d8d81 [25/45] Drivers: hv: vmbus: 
Add support for VMBus panic notifier handler
reproduce:
  # apt-get install sparse
  git checkout 96c1d0581d00f7abe033350edb021a9d947d8d81
  make ARCH=x86_64 allmodconfig
  make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/hv/vmbus_drv.c:67:9: sparse: constant 0x8000000000000000 is so big 
>> it is unsigned long
>> drivers/hv/vmbus_drv.c:67:9: sparse: constant 0x8000000000000000 is so big 
>> it is unsigned long
>> drivers/hv/vmbus_drv.c:51:5: sparse: symbol 'hyperv_panic_event' was not 
>> declared. Should it be static?
>> drivers/hv/vmbus_drv.c:67:9: sparse: cast truncates bits from constant value 
>> (8000000000000000 becomes 0)

Please review and possibly fold the followup patch.

vim +67 drivers/hv/vmbus_drv.c

    45  
    46  static struct tasklet_struct msg_dpc;
    47  static struct completion probe_event;
    48  static int irq;
    49  
    50  
  > 51  int hyperv_panic_event(struct notifier_block *nb,
    52                          unsigned long event, void *ptr)
    53  {
    54          struct pt_regs *regs;
    55  
    56          regs = current_pt_regs();
    57  
    58          wrmsrl(HV_X64_MSR_CRASH_P0, regs->ip);
    59          wrmsrl(HV_X64_MSR_CRASH_P1, regs->ax);
    60          wrmsrl(HV_X64_MSR_CRASH_P2, regs->bx);
    61          wrmsrl(HV_X64_MSR_CRASH_P3, regs->cx);
    62          wrmsrl(HV_X64_MSR_CRASH_P4, regs->dx);
    63  
    64          /*
    65           * Let Hyper-V know there is crash data available
    66           */
  > 67          wrmsrl(HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_CRASH_NOTIFY);
    68          return NOTIFY_DONE;
    69  }
    70  

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