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| author |   Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2025-07-10 10:27:48 +0200 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2025-07-10 17:52:13 +0200 |
| commit | 2885daf47081dd1aaf1a588e9d001eb343df1f90 (patch) | |
| tree | 11fc6d0f2237a85a227d9f6dedc06f23add30a5f | |
| parent | sched/fair: Always trigger resched at the end of a protected period (diff) | |
| download | wireguard-linux-2885daf47081dd1aaf1a588e9d001eb343df1f90.tar.xz wireguard-linux-2885daf47081dd1aaf1a588e9d001eb343df1f90.zip | |
lib/smp_processor_id: Make migration check unconditional of SMP
Commit cac5cefbade90 ("sched/smp: Make SMP unconditional")
migrate_disable() even on UP builds.
Commit 06ddd17521bf1 ("sched/smp: Always define is_percpu_thread() and
scheduler_ipi()") made is_percpu_thread() check the affinity mask
instead replying always true for UP mask.
As a consequence smp_processor_id() now complains if invoked within a
migrate_disable() section because is_percpu_thread() checks its mask and
the migration check is left out.
Make migration check unconditional of SMP.
Fixes: cac5cefbade90 ("sched/smp: Make SMP unconditional")
Closes: https://lore.kernel.org/oe-lkp/202507100448.6b88d6f1-lkp@intel.com
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Chen Yu <yu.c.chen@intel.com>
Link: https://lore.kernel.org/r/20250710082748.-DPO1rjO@linutronix.de
| -rw-r--r-- | lib/smp_processor_id.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c index a2bb7738c373..94b3f6b19538 100644 --- a/lib/smp_processor_id.c +++ b/lib/smp_processor_id.c @@ -22,10 +22,8 @@ unsigned int check_preemption_disabled(const char *what1, const char *what2) if (is_percpu_thread()) goto out; -#ifdef CONFIG_SMP if (current->migration_disabled) goto out; -#endif /* * It is valid to assume CPU-locality during early bootup: |