Fix __read_seqcount_begin() to use ACCESS_ONCE for sequence value read

[linux-beck.git] / include / linux / seqlock.h

diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index c6db9fb33c448f28197ffb6d135689daf58625b6..bb1fac5b8ee87f99def8e3565c40ac18f4e930e9 100644 (file)
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -141,7 +141,7 @@ static inline unsigned __read_seqcount_begin(const seqcount_t *s)
        unsigned ret;
 
 repeat:
-       ret = s->sequence;
+       ret = ACCESS_ONCE(s->sequence);
        if (unlikely(ret & 1)) {
                cpu_relax();
                goto repeat;