Hi Byungchul, Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tip/sched/core] [also build test WARNING on v4.15-rc7 next-20180110] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Byungchul-Park/sched-deadline-Add-support-for-SD_PREFER_SIBLING-on-find_later_rq/20180110-225946 reproduce: # apt-get install sparse make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__ sparse warnings: (new ones prefixed by >>) kernel/sched/sched.h:2104:16: sparse: incompatible types in comparison expression (different address spaces) kernel/sched/rt.c:1681:9: sparse: incompatible types in comparison expression (different address spaces) >> kernel/sched/rt.c:1629:55: sparse: incorrect type in argument 1 (different >> modifiers) @@ expected struct sched_domain @@ got structstruct sched_domain >> @@ kernel/sched/rt.c:1629:55: expected struct sched_domain kernel/sched/rt.c:1629:55: got struct sched_domain const kernel/sched/rt.c:1630:64: sparse: incorrect type in argument 1 (different modifiers) @@ expected struct sched_domain @@ got structstruct sched_domain @@ kernel/sched/rt.c:1630:64: expected struct sched_domain kernel/sched/rt.c:1630:64: got struct sched_domain const kernel/sched/rt.c:1824:9: sparse: context imbalance in 'find_lock_lowest_rq' - different lock contexts for basic block kernel/sched/rt.c:1919:9: sparse: context imbalance in 'push_rt_task' - unexpected unlock kernel/sched/rt.c: In function 'find_cpu': kernel/sched/rt.c:1629:48: warning: passing argument 1 of 'sched_domain_span' discards 'const' qualifier from pointer target type const struct cpumask = sched_domain_span(sd); ^~ In file included from kernel/sched/sched.h:6:0, from kernel/sched/rt.c:7: include/linux/sched/topology.h:160:31: note: expected 'struct sched_domain but argument is of type 'const struct sched_domain static inline struct cpumask sched_domain ^~~~~~~~~~~~~~~~~ kernel/sched/rt.c:1630:57: warning: passing argument 1 of 'sched_domain_span' discards 'const' qualifier from pointer target type const struct cpumask = prefer sched_domain_span(prefer) : NULL; ^~~~~~ In file included from kernel/sched/sched.h:6:0, from kernel/sched/rt.c:7: include/linux/sched/topology.h:160:31: note: expected 'struct sched_domain but argument is of type 'const struct sched_domain static inline struct cpumask sched_domain ^~~~~~~~~~~~~~~~~ vim +1629 kernel/sched/rt.c 1621 1622 /* 1623 * Find the first cpu in: mask & sd & ~prefer 1624 */ 1625 static int find_cpu(const struct cpumask *mask, 1626 const struct sched_domain *sd, 1627 const struct sched_domain *prefer) 1628 { > 1629 const struct cpumask *sds = sched_domain_span(sd); 1630 const struct cpumask *ps = prefer ? sched_domain_span(prefer) : NULL; 1631 int cpu; 1632 1633 for_each_cpu(cpu, mask) { 1634 if (!cpumask_test_cpu(cpu, sds)) 1635 continue; 1636 if (ps && cpumask_test_cpu(cpu, ps)) 1637 continue; 1638 break; 1639 } 1640 1641 return cpu; 1642 } 1643 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
