mm: migrate: prevent racy access to tlb_flush_pending

[karo-tx-linux.git] / mm / mprotect.c

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 4180ad8cc9c5e70c661efc8f30416af40e9c0066..bd0f409922cb2fc133f9fecba64a839380d4f937 100644 (file)
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -244,7 +244,7 @@ static unsigned long change_protection_range(struct vm_area_struct *vma,
        BUG_ON(addr >= end);
        pgd = pgd_offset(mm, addr);
        flush_cache_range(vma, addr, end);
-       set_tlb_flush_pending(mm);
+       inc_tlb_flush_pending(mm);
        do {
                next = pgd_addr_end(addr, end);
                if (pgd_none_or_clear_bad(pgd))
@@ -256,7 +256,7 @@ static unsigned long change_protection_range(struct vm_area_struct *vma,
        /* Only flush the TLB if we actually modified any entries: */
        if (pages)
                flush_tlb_range(vma, start, end);
-       clear_tlb_flush_pending(mm);
+       dec_tlb_flush_pending(mm);
 
        return pages;
 }