I915_VMA_USERFAULT_BIT
return test_and_set_bit(I915_VMA_USERFAULT_BIT, __i915_vma_flags(vma));
return clear_bit(I915_VMA_USERFAULT_BIT, __i915_vma_flags(vma));
return test_bit(I915_VMA_USERFAULT_BIT, __i915_vma_flags(vma));
#define I915_VMA_USERFAULT ((int)BIT(I915_VMA_USERFAULT_BIT))