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

From: kbuild test robot <fengguang.wu@intel.com>
To: Nick Meier <nmeier@microsoft.com>
Cc: kbuild-all@01.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	devel@linuxdriverproject.org, linux-kernel@vger.kernel.org
Subject: [char-misc:char-misc-testing 25/45] drivers/hv/vmbus_drv.c:67:9: sparse: constant 0x8000000000000000 is so big it is unsigned long
Date: Mon, 2 Mar 2015 11:49:23 +0800	[thread overview]
Message-ID: <201503021114.KsEpH21F%fengguang.wu@intel.com> (raw)

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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