sparc64: Fix executable bit testing in set_pmd_at() paths.

[ Upstream commit 5b1e94fa439a3227beefad58c28c17f68287a8e9 ]

This code was mistakenly using the exec bit from the PMD in all
cases, even when the PMD isn't a huge PMD.

If it's not a huge PMD, test the exec bit in the individual ptes down
in tlb_batch_pmd_scan().

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c
index b12cb5e..c07667f 100644 (file)
--- 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;
        }
@@ -177,15 +180,15 @@ 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);
                }
        }
 }