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timers/migration: Clean up the loop in tmigr_quick_check()

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Make the logic easier to follow:

  - Remove the final return statement, which is never reached, and move the
    actual walk-terminating return statement out of the do-while loop.

  - Remove the else-clause to reduce indentation. If a non-lonely group is
    encountered during the walk, the loop is immediately terminated with a
    return statement anyway; no need for an else.

Signed-off-by: Petr Tesarik <ptesarik@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/all/20250606124818.455560-1-ptesarik@suse.com
This commit is contained in:
Petr Tesarik 2025-06-06 14:48:18 +02:00 committed by Thomas Gleixner
parent 19272b37aa
commit ff56a3e2a8
1 changed files with 10 additions and 13 deletions
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23
kernel/time/timer_migration.c
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@ -1405,23 +1405,20 @@ u64 tmigr_quick_check(u64 nextevt)
return KTIME_MAX; return KTIME_MAX;
do { do {
if (!tmigr_check_lonely(group)) { if (!tmigr_check_lonely(group))
return KTIME_MAX; return KTIME_MAX;
} else {
/* /*
* Since current CPU is active, events may not be sorted * Since current CPU is active, events may not be sorted
* from bottom to the top because the CPU's event is ignored * from bottom to the top because the CPU's event is ignored
* up to the top and its sibling's events not propagated upwards. * up to the top and its sibling's events not propagated upwards.
* Thus keep track of the lowest observed expiry. * Thus keep track of the lowest observed expiry.
*/ */
nextevt = min_t(u64, nextevt, READ_ONCE(group->next_expiry)); nextevt = min_t(u64, nextevt, READ_ONCE(group->next_expiry));
if (!group->parent)
return nextevt;
}
group = group->parent; group = group->parent;
} while (group); } while (group);
return KTIME_MAX; return nextevt;
} }
/* /*