MSI_DATA_LEVEL_SHIFT   22 arch/x86/include/asm/msidef.h #define	 MSI_DATA_LEVEL_DEASSERT	(0 << MSI_DATA_LEVEL_SHIFT)
MSI_DATA_LEVEL_SHIFT   23 arch/x86/include/asm/msidef.h #define	 MSI_DATA_LEVEL_ASSERT		(1 << MSI_DATA_LEVEL_SHIFT)