From: David S. Miller <davem@davemloft.net>
Date: Wed, 3 Sep 2008 09:14:39 +0000 (-0700)
Subject: sparc64: Fix IPI call locking.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e5bd1c3fdd06b6c0fa6dfb98ce31cea1820ce4e9;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

sparc64: Fix IPI call locking.

When I switched sparc64 over to the generic helpers for
smp_call_function(), I didn't convert the dinky call_lock
we had.

Use ipi_call_lock() and ipi_call_unlock().

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 743ccad61c60..0712a445f98e 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -80,8 +80,6 @@ void smp_bogo(struct seq_file *m)
 			   i, cpu_data(i).clock_tick);
 }
 
-static __cacheline_aligned_in_smp DEFINE_SPINLOCK(call_lock);
-
 extern void setup_sparc64_timer(void);
 
 static volatile unsigned long callin_flag = 0;
@@ -120,9 +118,9 @@ void __cpuinit smp_callin(void)
 	while (!cpu_isset(cpuid, smp_commenced_mask))
 		rmb();
 
-	spin_lock(&call_lock);
+	ipi_call_lock();
 	cpu_set(cpuid, cpu_online_map);
-	spin_unlock(&call_lock);
+	ipi_call_unlock();
 
 	/* idle thread is expected to have preempt disabled */
 	preempt_disable();
@@ -1305,9 +1303,9 @@ int __cpu_disable(void)
 	c->core_id = 0;
 	c->proc_id = -1;
 
-	spin_lock(&call_lock);
+	ipi_call_lock();
 	cpu_clear(cpu, cpu_online_map);
-	spin_unlock(&call_lock);
+	ipi_call_unlock();
 
 	smp_wmb();