diff options
| author | Valentin Schneider <valentin.schneider@arm.com> | 2020-03-03 11:02:57 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-03-06 12:57:22 +0100 |
| commit | 76c389ab2b5e300698eab87f9d4b7916f14117ba (patch) | |
| tree | 6574a89da9fa2bc0872f8e548442168ca7bb8edf /kernel/sched | |
| parent | 05289b90c2e40ae80f5c70431cd0be4cc8a6038d (diff) | |
sched/fair: Fix kernel build warning in test_idle_cores() for !SMT NUMA
Building against the tip/sched/core as ff7db0bf24db ("sched/numa: Prefer
using an idle CPU as a migration target instead of comparing tasks") with
the arm64 defconfig (which doesn't have CONFIG_SCHED_SMT set) leads to:
kernel/sched/fair.c:1525:20: warning: 'test_idle_cores' declared 'static' but never defined [-Wunused-function]
static inline bool test_idle_cores(int cpu, bool def);
^~~~~~~~~~~~~~~
Rather than define it in its own CONFIG_SCHED_SMT #define island, bunch it
up with test_idle_cores().
Reported-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
[mgorman@techsingularity.net: Edit changelog, minor style change]
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: ff7db0bf24db ("sched/numa: Prefer using an idle CPU as a migration target instead of comparing tasks")
Link: https://lkml.kernel.org/r/20200303110258.1092-3-mgorman@techsingularity.net
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/fair.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 79bb423de1e6..bba945277205 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1533,9 +1533,6 @@ static inline bool is_core_idle(int cpu) return true; } -/* Forward declarations of select_idle_sibling helpers */ -static inline bool test_idle_cores(int cpu, bool def); - struct task_numa_env { struct task_struct *p; @@ -1571,9 +1568,11 @@ numa_type numa_classify(unsigned int imbalance_pct, return node_fully_busy; } +#ifdef CONFIG_SCHED_SMT +/* Forward declarations of select_idle_sibling helpers */ +static inline bool test_idle_cores(int cpu, bool def); static inline int numa_idle_core(int idle_core, int cpu) { -#ifdef CONFIG_SCHED_SMT if (!static_branch_likely(&sched_smt_present) || idle_core >= 0 || !test_idle_cores(cpu, false)) return idle_core; @@ -1584,10 +1583,15 @@ static inline int numa_idle_core(int idle_core, int cpu) */ if (is_core_idle(cpu)) idle_core = cpu; -#endif return idle_core; } +#else +static inline int numa_idle_core(int idle_core, int cpu) +{ + return idle_core; +} +#endif /* * Gather all necessary information to make NUMA balancing placement |