On Sat, Jun 01, 2002 at 09:40:02AM -0700, William Lee Irwin III wrote:
...
patch updated to incorporate rusty's suggestion:
===== mm/memory.c 1.70 vs edited =====
--- 1.70/mm/memory.c Fri May 31 18:18:07 2002
+++ edited/mm/memory.c Sun Jun 2 22:37:17 2002
@@ -310,17 +310,6 @@
return -ENOMEM;
}
-/*
- * Return indicates whether a page was freed so caller can adjust rss
- */
-static inline void forget_pte(pte_t page)
-{
- if (!pte_none(page)) {
- printk("forget_pte: old mapping existed!\n");
- BUG();
- }
-}
-
static void zap_pte_range(mmu_gather_t *tlb, pmd_t * pmd, unsigned long address, unsigned long size)
{
unsigned long offset;
@@ -779,7 +768,8 @@
pte_t zero_pte = pte_wrprotect(mk_pte(ZERO_PAGE(address), prot));
pte_t oldpage = ptep_get_and_clear(pte);
set_pte(pte, zero_pte);
- forget_pte(oldpage);
+ /* PTE's must be unmapped */
+ BUG_ON(!pte_none(oldpage));
address += PAGE_SIZE;
pte++;
} while (address && (address < end));
@@ -857,7 +847,8 @@
if (!pfn_valid(pfn) || PageReserved(pfn_to_page(pfn)))
set_pte(pte, pfn_pte(pfn, prot));
- forget_pte(oldpage);
+ /* PTE's must be unmapped */
+ BUG_ON(!pte_none(oldpage));
address += PAGE_SIZE;
pfn++;
pte++;
-
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This archive was generated by hypermail 2b29 : Fri Jun 07 2002 - 22:00:13 EST