On Fri, Jul 10, 2020 at 09:56:31AM +0200, Rasmus Villemoes wrote: > The ability to check open file descriptions for equality (without > resorting to unreliable fstat() and fcntl(F_GETFL) comparisons) can be > useful outside of the checkpoint/restore use case - for example, > systemd uses kcmp() to deduplicate the per-service file descriptor > store. > > Make it possible to have the kcmp() syscall without the full > CONFIG_CHECKPOINT_RESTORE. > > Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> > --- > I deliberately drop the ifdef in the eventpoll.h header rather than > replace with KCMP_SYSCALL; it's harmless to declare a function that > isn't defined anywhere. Could you please point why setting #fidef KCMP_SYSCALL in eventpoll.h is not suitable? Still the overall idea is fine for me, thanks! Reviewed-by: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
