[PATCH v6 17/17] sched/topology: Expand use of SD_DEGENERATE_GROUPS_MASK to flags not needing groups

Valentin Schneider
2020-08-17T11:31:17Z

All SD flags requiring 2+ sched_group to have any effect are now decorated
with the SDF_NEEDS_GROUPS metaflag. This means we can now use the bitwise
negation of SD_DEGENERATE_MASK in sd_degenerate() instead of explicitly
using SD_WAKE_AFFINE (IOW the only flag without SDF_NEEDS_GROUPS).

From now on, any flag without SDF_NEEDS_GROUPS will be correctly accounted
as a flag not requiring 2+ sched_groups.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
kernel/sched/topology.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 8064f495641b..3bb145ef5abd 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -165,7 +165,7 @@ static int sd_degenerate(struct sched_domain *sd)
return 0;

/* Following flags don't use groups */
- if (sd->flags & (SD_WAKE_AFFINE))
+ if (sd->flags & ~SD_DEGENERATE_GROUPS_MASK)
return 0;

return 1;
--
2.27.0