In case the kernel configuration is UP is, the migrate_disable member
in task_struct is missing.
linux/lib/smp_processor_id.c: In function ‘check_preemption_disabled’:
linux/lib/smp_processor_id.c:26:13: error: ‘struct task_struct’ has no member named ‘migrate_disable’
26 | if (current->migrate_disable)
| ^~
Fixes: 425c5b38779a ("sched: Lazy migrate_disable processing")
Cc: Scott Wood <swood@xxxxxxxxxx>
Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Daniel Wagner <dwagner@xxxxxxx>
---
lib/smp_processor_id.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
index 5f2618d346c4..a914f73e3652 100644
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -23,8 +23,10 @@ unsigned int check_preemption_disabled(const char *what1, const char *what2)
* Kernel threads bound to a single CPU can safely use
* smp_processor_id():
*/
+#if defined(CONFIG_SMP) && defined(CONFIG_PREEMPT_RT_BASE)
if (current->migrate_disable)
goto out;
+#endif
if (current->nr_cpus_allowed == 1)
goto out;
--
2.24.0
