um tlb rcu fix

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>

diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 670d130e6e8629496e4865ce4973bb7e38a1704b..a6ab30cd7d08aa08df3a4fabd7609227ea8b9c7f 100644 (file)
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -593,6 +593,7 @@ void flush_tlb_mm(struct mm_struct *mm)
        struct vm_area_struct *vma;
        MA_STATE(mas, &mm->mm_mt, 0, 0);
 
+       /* Must hold mm_mt lock already */
        mas_for_each(&mas, vma, ULONG_MAX)
                fix_range(mm, vma->vm_start, vma->vm_end, 0);
 }
@@ -603,6 +604,7 @@ void force_flush_all(void)
        struct vm_area_struct *vma;
        MA_STATE(mas, &mm->mm_mt, 0, 0);
 
+       /* Must hold mm_mt lock already */
        mas_for_each(&mas, vma, ULONG_MAX)
                fix_range(mm, vma->vm_start, vma->vm_end, 1);
 }