How to enable VIDEOBUF2_VMALLOC

[m silverstri]

Hi,

How can I enable VIDEOBUF2_VMALLOC?
I try 'make menuconfig', but I don't know how can I configure to
enable VIDEOBUF2_VMALLOC:

Symbol: VIDEOBUF2_VMALLOC [=n]
  │ Type  : tristate
  │   Defined at drivers/media/v4l2-core/Kconfig:75
  │   Depends on: MEDIA_SUPPORT [=y]
  │   Selects: VIDEOBUF2_CORE [=y] && VIDEOBUF2_MEMOPS [=n] &&
DMA_SHARED_BUFFER [=y]
  │   Selected by: USB_VIDEO_CLASS [=n] && USB [=y] && MEDIA_SUPPORT
[=y] && MEDIA_USB_SUPPORT [=n] && MEDIA_CAMERA_SUPPORT [=y] || USB_PWC
[=n] && USB [=y] && MEDIA_SUPPORT [=y] && MEDIA_USB_SUPPORT [=n] &&
MEDIA_CAMERA_SUPPORT [=y] && VIDEO_V4L2 [=y] || VIDEO_STK1160 [=n] &&
USB [=y] && MEDIA_SUPPORT [=y] && MEDIA_USB_SUPPORT [=n] &&
MEDIA_ANALOG_TV_SUPPORT [=n] && VIDEO_DEV [=y] && I2C [=y] ||
VIDEO_EM28XX [=n] && USB [=y] && MEDIA_SUPPORT [=y] &&
MEDIA_USB_SUPPORT [=n] && (MEDIA_CAMERA_SUPPORT [=y]

Thank you.