Make the pte unmapping atomic wrt other threads.

d8814650 · Linus Torvalds · d4c64640 · d8814650
Commit d8814650 authored May 21, 2002 by Linus Torvalds
Hide whitespace changes
Inline Side-by-side

Showing with 1 addition and 2 deletions

mm/memory.c mm/memory.c +1 -2

No files found.
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -343,8 +343,7 @@ static void zap_pte_range(mmu_gather_t *tlb, pmd_t * pmd, unsigned long address,
 		if (pte_present(pte)) {
 			unsigned long pfn = pte_pfn(pte);
-			pte_clear(ptep);
+			pte = ptep_get_and_clear(ptep);
-			pfn = pte_pfn(pte);
 			tlb_remove_tlb_entry(tlb, pte, address+offset);
 			if (pfn_valid(pfn)) {
 				struct page *page = pfn_to_page(pfn);