dlm_cb_seq is 64 bits. If dlm_cb_seq overflows and returns to 0, dlm_rem_lkb_callback() will not work properly.
Signed-off-by: Tadashi Miyauchi <miyau...@toshiba-tops.co.jp> Signed-off-by: Tsutomu Owa <tsutomu....@toshiba.co.jp> --- fs/dlm/ast.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c index 07fed83..562fa8c 100644 --- a/fs/dlm/ast.c +++ b/fs/dlm/ast.c @@ -181,6 +181,8 @@ void dlm_add_cb(struct dlm_lkb *lkb, uint32_t flags, int mode, int status, spin_lock(&dlm_cb_seq_spin); new_seq = ++dlm_cb_seq; + if (!dlm_cb_seq) + new_seq = ++dlm_cb_seq; spin_unlock(&dlm_cb_seq_spin); if (lkb->lkb_flags & DLM_IFL_USER) { -- 2.7.4