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timers/migration: Simplify top level detection on group setup

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Having a single group on a given level is enough to know this is the
top level, because a root has to have at least two children, unless that
root is the only group and the children are actual CPUs.

Simplify the test in tmigr_setup_groups() accordingly.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250114231507.21672-5-frederic@kernel.org
This commit is contained in:
Frederic Weisbecker
2025-01-15 00:15:07 +01:00
committed by Thomas Gleixner
parent 3ec955713d
commit dcf6230555
1 changed files with 1 additions and 3 deletions
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4
kernel/time/timer_migration.c
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@@ -1624,9 +1624,7 @@ static int tmigr_setup_groups(unsigned int cpu, unsigned int node)
* be different from tmigr_hierarchy_levels, contains only a
* single group.
*/
if (group->parent || i == tmigr_hierarchy_levels ||
(list_empty(&tmigr_level_list[i]) &&
list_is_singular(&tmigr_level_list[i - 1])))
if (group->parent || list_is_singular(&tmigr_level_list[i - 1]))
break;
} while (i < tmigr_hierarchy_levels);