Subject: [PATCH 2/2] powerpc/rtas: allow rescheduling while changing cpu states

From: Nathan Lynch <[email-masked]>
Date: Thu, 18 Jul 2019 14:29:40 -0500

rtas_cpu_state_change_mask() potentially operates on scores of cpus,
so explicitly allow rescheduling in the loop body.

Signed-off-by: Nathan Lynch <[email-masked]>
---
 arch/powerpc/kernel/rtas.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index fbefd9ff6dab..396fb2f35c01 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -20,6 +20,7 @@
 #include <linux/capability.h>
 #include <linux/delay.h>
 #include <linux/cpu.h>
+#include <linux/sched.h>
 #include <linux/smp.h>
 #include <linux/completion.h>
 #include <linux/cpumask.h>
@@ -902,6 +903,7 @@ static int rtas_cpu_state_change_mask(enum rtas_cpu_state state,
 				cpumask_clear_cpu(cpu, cpus);
 			}
 		}
+		cond_resched();
 	}
 
 	return ret;
-- 
2.20.1