[kvm:queue 11/19] include/linux/sched/isolation.h:42:46: warning: no return statement in function returning non-void

[kbuild test robot <lkp@xxxxxxxxx>]

tree:   https://kernel.googlesource.com/pub/scm/virt/kvm/kvm.git queue
head:   1ef434d025591b41eaff10e2bbc59088eecda4aa
commit: 892617bbd4e02a1a3314d09aa1c861b9c02307de [11/19] KVM: LAPIC: Inject timer interrupt via posted interrupt
config: i386-allnoconfig (attached as .config)
compiler: gcc-7 (Debian 7.4.0-10) 7.4.0
reproduce:
        git checkout 892617bbd4e02a1a3314d09aa1c861b9c02307de
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   In file included from init/main.c:50:0:
   include/linux/sched/isolation.h: In function 'housekeeping_enabled':
>> include/linux/sched/isolation.h:42:46: warning: no return statement in function returning non-void [-Wreturn-type]
    static inline bool housekeeping_enabled(enum hk_flags flags) { }
                                                 ^~~~~~~~

vim +42 include/linux/sched/isolation.h

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