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Specify how much physically continuous, DMA capable memory will be allocated at driver initialization time. This allow to create framebuffer device with larger virtual resolution. Combine with y-panning this can be used to implement double buffering acceleration method. Signed-off-by: Stanislaw Gruszka <[email protected]> Acked-by: Haavard Skinnemoen <[email protected]> Acked-by: Krzysztof Helt <[email protected]> Cc: Nicolas Ferre <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>