Merge commit '7ed6fb9b5a5510e4ef78ab27419184741169978a' into x86/espfix

Merge in Linus' tree with:

fa81511bb0bb x86-64, modify_ldt: Make support for 16-bit segments a runtime option

... reverted, to avoid a conflict.  This commit is no longer necessary
with the proper fix in place.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 20 insertions, 6 deletions

diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c
index b12cb5e..b89aba2 100644
--- a/arch/sparc/mm/tlb.c
+++ b/arch/sparc/mm/tlb.c
@@ -134,7 +134,7 @@ no_cache_flush:
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 static void tlb_batch_pmd_scan(struct mm_struct *mm, unsigned long vaddr,
-			       pmd_t pmd, bool exec)
+			       pmd_t pmd)
 {
 	unsigned long end;
 	pte_t *pte;
@@ -142,8 +142,11 @@ static void tlb_batch_pmd_scan(struct mm_struct *mm, unsigned long vaddr,
 	pte = pte_offset_map(&pmd, vaddr);
 	end = vaddr + HPAGE_SIZE;
 	while (vaddr < end) {
-		if (pte_val(*pte) & _PAGE_VALID)
+		if (pte_val(*pte) & _PAGE_VALID) {
+			bool exec = pte_exec(*pte);
+
 			tlb_batch_add_one(mm, vaddr, exec);
+		}
 		pte++;
 		vaddr += PAGE_SIZE;
 	}
@@ -177,19 +180,30 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 	}
 
 	if (!pmd_none(orig)) {
-		pte_t orig_pte = __pte(pmd_val(orig));
-		bool exec = pte_exec(orig_pte);
-
 		addr &= HPAGE_MASK;
 		if (pmd_trans_huge(orig)) {
+			pte_t orig_pte = __pte(pmd_val(orig));
+			bool exec = pte_exec(orig_pte);
+
 			tlb_batch_add_one(mm, addr, exec);
 			tlb_batch_add_one(mm, addr + REAL_HPAGE_SIZE, exec);
 		} else {
-			tlb_batch_pmd_scan(mm, addr, orig, exec);
+			tlb_batch_pmd_scan(mm, addr, orig);
 		}
 	}
 }
 
+void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
+		     pmd_t *pmdp)
+{
+	pmd_t entry = *pmdp;
+
+	pmd_val(entry) &= ~_PAGE_VALID;
+
+	set_pmd_at(vma->vm_mm, address, pmdp, entry);
+	flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
+}
+
 void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
 				pgtable_t pgtable)
 {