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

[ Upstream commit 5b1e94fa43 ]

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>
This commit is contained in:
David S. Miller 2014-04-20 21:55:01 -04:00 committed by Greg Kroah-Hartman
parent 7f6073dcb4
commit 24924bc7e2
1 changed files with 9 additions and 6 deletions
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15
arch/sparc/mm/tlb.c
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@ -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);
}
}
}