diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index 438c52a313b1..9d2b206251ac 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -383,39 +383,6 @@ static int insn_rw_emulate_bits(struct comedi_device *dev,
 	return 1;
 }
 
-static inline unsigned long uvirt_to_kva(pgd_t *pgd, unsigned long adr)
-{
-	unsigned long ret = 0UL;
-	pmd_t *pmd;
-	pte_t *ptep, pte;
-	pud_t *pud;
-
-	if (!pgd_none(*pgd)) {
-		pud = pud_offset(pgd, adr);
-		pmd = pmd_offset(pud, adr);
-		if (!pmd_none(*pmd)) {
-			ptep = pte_offset_kernel(pmd, adr);
-			pte = *ptep;
-			if (pte_present(pte)) {
-				ret = (unsigned long)
-				    page_address(pte_page(pte));
-				ret |= (adr & (PAGE_SIZE - 1));
-			}
-		}
-	}
-	return ret;
-}
-
-static inline unsigned long kvirt_to_kva(unsigned long adr)
-{
-	unsigned long va, kva;
-
-	va = adr;
-	kva = uvirt_to_kva(pgd_offset_k(va), va);
-
-	return kva;
-}
-
 int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s,
 		     unsigned long new_size)
 {