[REGRESSION 4.11] Commit d8514d8edb5b ("ovl: copy up regular file using O_TMPFILE") breaks ubifs

[Richard Weinberger]

Ralph,

Am 30.03.2017 um 07:53 schrieb Ralph Sennhauser:
> With this patch I'm no longer able to reproduce _this_ issue, however,
> rename no longer works either:
> 
>   # mv /etc/config/wireless /etc/config/wireless.back
>   mv: can't rename '/etc/config/wireless': Invalid argument
>   # ls /etc/config/wireless
>   /etc/config/wireless
>   # rm /etc/config/wireless
>   # ls /etc/config/wireless
>   ls: /etc/config/wireless: No such file or directory
> 

Please apply this one too:
http://lists.infradead.org/pipermail/linux-mtd/2017-March/072613.html

Thanks,
//richard