[PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

[Cyrill Gorcunov]

On Fri, Feb 05, 2021 at 10:00:12PM +0000, Chris Wilson wrote:
> Userspace has discovered the functionality offered by SYS_kcmp and has
> started to depend upon it. In particular, Mesa uses SYS_kcmp for
> os_same_file_description() in order to identify when two fd (e.g. device
> or dmabuf) point to the same struct file. Since they depend on it for
> core functionality, lift SYS_kcmp out of the non-default
> CONFIG_CHECKPOINT_RESTORE into the selectable syscall category.
> 
...
Reviewed-by: Cyrill Gorcunov <gorcunov at gmail.com>