From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
There's no need to open-code it when there's helpful utility function
to do the job.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Cc: Nick Piggin <npiggin@xxxxxxxxx>
---
mm/vmalloc.c | 53 +++++++++--------------------------------------------
1 files changed, 9 insertions(+), 44 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 67ce748..5c5ad6a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -33,59 +33,24 @@
/*** Page table manipulation functions ***/
-static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end)
+static int vunmap_pte(pte_t *pte, unsigned count,
+ unsigned long addr, void *data)
{
- pte_t *pte;
-
- pte = pte_offset_kernel(pmd, addr);
- do {
+ while (count--) {
pte_t ptent = *pte;
- WARN_ON(!pte_none(ptent) && !pte_present(ptent));
- pte_clear(&init_mm, addr, pte);
- } while (pte++, addr += PAGE_SIZE, addr != end);
-}
-
-static void vunmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long end)
-{
- pmd_t *pmd;
- unsigned long next;
- pmd = pmd_offset(pud, addr);
- do {
- next = pmd_addr_end(addr, end);
- if (pmd_none_or_clear_bad(pmd))
- continue;
- vunmap_pte_range(pmd, addr, next);
- } while (pmd++, addr = next, addr != end);
-}
+ WARN_ON(!pte_none(ptent) && !pte_present(ptent));
-static void vunmap_pud_range(pgd_t *pgd, unsigned long addr, unsigned long end)
-{
- pud_t *pud;
- unsigned long next;
+ pte_clear(&init_mm, addr, pte++);
+ addr += PAGE_SIZE;
+ }
- pud = pud_offset(pgd, addr);
- do {
- next = pud_addr_end(addr, end);
- if (pud_none_or_clear_bad(pud))
- continue;
- vunmap_pmd_range(pud, addr, next);
- } while (pud++, addr = next, addr != end);
+ return 0;
}
static void vunmap_page_range(unsigned long addr, unsigned long end)
{
- pgd_t *pgd;
- unsigned long next;
-
- BUG_ON(addr >= end);
- pgd = pgd_offset_k(addr);
- do {
- next = pgd_addr_end(addr, end);
- if (pgd_none_or_clear_bad(pgd))
- continue;
- vunmap_pud_range(pgd, addr, next);
- } while (pgd++, addr = next, addr != end);
+ apply_to_page_range_batch(&init_mm, addr, end - addr, vunmap_pte, NULL);
}
static int vmap_pte_range(pmd_t *pmd, unsigned long addr,
--
1.7.3.3
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