Function frame_allocator::allocate_frames_by_bytes

pub fn allocate_frames_by_bytes(
    num_bytes: usize
) -> Option<AllocatedFrames<Page4K>>

Allocates frames with no constraints on the starting physical address, with a size given by the number of bytes.

This function still allocates whole frames by rounding up the number of bytes. See allocate_frames_deferred() for more details.