hv: drivers/hv/vmbus_drv.c:2082:29: error: shift count >= width of type

[Vitaly Chikunov <vt@xxxxxxxxxxxx>]

Hi,

There is new compilation error (for a second week for drm-tip[1] kernel):

     CC [M]  drivers/hv/vmbus_drv.o
   drivers/hv/vmbus_drv.c:2082:29: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
   static u64 vmbus_dma_mask = DMA_BIT_MASK(64);
			       ^~~~~~~~~~~~~~~~
   ./include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
   #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
							^ ~~~
   1 error generated.

I understand this looks like possible GCC (11.2.1) bug, but still it prevents
building kernel with CONFIG_HYPERV.

Thanks,

[1] git://anongit.freedesktop.org/drm-tip