From: J. Bruce Fields bfields@redhat.com
commit 4aa5e002034f0701c3335379fd6c22d7f3338cce upstream.
This reverts commit 50747dd5e47b "nfsd4: remove check_conflicting_opens warning", as a prerequisite for reverting 94415b06eb8a, which has a serious bug.
Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields bfields@redhat.com Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/nfsd/nfs4state.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4957,6 +4957,7 @@ static int nfsd4_check_conflicting_opens writes--; if (fp->fi_fds[O_RDWR]) writes--; + WARN_ON_ONCE(writes < 0); if (writes > 0) return -EAGAIN; spin_lock(&fp->fi_lock);