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Allocate/release a chunk of vmalloc address space: alloc_vm_area reserves a chunk of address space, and makes sure all the pagetables are constructed for that address range - but no pages. free_vm_area releases the address space range. Signed-off-by: Jeremy Fitzhardinge <[email protected]> Signed-off-by: Ian Pratt <[email protected]> Signed-off-by: Christian Limpach <[email protected]> Signed-off-by: Chris Wright <[email protected]> Cc: "Jan Beulich" <[email protected]> Cc: "Andi Kleen" <[email protected]>