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-rw-r--r--fs/dcache.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 1f24cd6..eacc853 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2924,6 +2924,7 @@ static int prepend_path(const struct path *path,
restart_mnt:
read_seqbegin_or_lock(&mount_lock, &m_seq);
seq = 0;
+ rcu_read_lock();
restart:
bptr = *buffer;
blen = *buflen;
@@ -2971,6 +2972,9 @@ restart:
goto restart;
}
done_seqretry(&rename_lock, seq);
+
+ if (!(m_seq & 1))
+ rcu_read_unlock();
if (need_seqretry(&mount_lock, m_seq)) {
m_seq = 1;
goto restart_mnt;
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