thp: remove unnecessary tlb flush for mprotect

change_protection() will do TLB flush later, don't need duplicate tlb
flush.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 763711121ef52be9df6f7b9892caf4c4cc1779e5..964fc5a2edd2cfcabf83a0e4f8288ad59acab47d 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1145,7 +1145,6 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
                        entry = pmd_modify(entry, newprot);
                        set_pmd_at(mm, addr, pmd, entry);
                        spin_unlock(&vma->vm_mm->page_table_lock);
-                       flush_tlb_range(vma, addr, addr + HPAGE_PMD_SIZE);
                        ret = 1;
                }
        } else