add checking of return status on fstat calls

[kpd-daemon]

Pull request for series with
subject: add checking of return status on fstat calls
version: 1
url: https://patchwork.kernel.org/project/linux-raid/list/?series=853394

[kpd-daemon]

Upstream branch: f0e729a
series: https://patchwork.kernel.org/project/linux-raid/list/?series=853394
version: 1

Pull request is NOT updated. Failed to apply https://patchwork.kernel.org/project/linux-raid/list/?series=853394
error message:

Cmd('git') failed due to: exit code(128)
  cmdline: git am --3way
  stdout: 'Patch is empty.
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To record the empty patch as an empty commit, run "git am --allow-empty".
To restore the original branch and stop patching, run "git am --abort".'

conflict:

[kpd-daemon]

At least one diff in series https://patchwork.kernel.org/project/linux-raid/list/?series=853394 irrelevant now. Closing PR.