From: Will Deacon <will.deacon@arm.com>
Date: Tue, 6 Oct 2015 17:46:28 +0000 (+0100)
Subject: arm64: mm: kill mm_cpumask usage
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=38d96287504a2478eb538bfecfa1fddd743bb6b2;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

arm64: mm: kill mm_cpumask usage

mm_cpumask isn't actually used for anything on arm64, so remove all the
code trying to keep it up-to-date.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index fdd4d4dbd64f..03b0aa28ea61 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -142,7 +142,6 @@ asmlinkage void secondary_start_kernel(void)
 	 */
 	atomic_inc(&mm->mm_count);
 	current->active_mm = mm;
-	cpumask_set_cpu(cpu, mm_cpumask(mm));
 
 	set_my_cpu_offset(per_cpu_offset(smp_processor_id()));
 	printk("CPU%u: Booted secondary processor\n", cpu);
@@ -233,12 +232,6 @@ int __cpu_disable(void)
 	 * OK - migrate IRQs away from this CPU
 	 */
 	migrate_irqs();
-
-	/*
-	 * Remove this CPU from the vm mask set of all processes.
-	 */
-	clear_tasks_mm_cpumask(cpu);
-
 	return 0;
 }
 
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index 4b9ec4484e3f..f636a2639f03 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -132,7 +132,6 @@ set_asid:
 
 bump_gen:
 	asid |= generation;
-	cpumask_clear(mm_cpumask(mm));
 	return asid;
 }
 
@@ -169,7 +168,6 @@ void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
 	raw_spin_unlock_irqrestore(&cpu_asid_lock, flags);
 
 switch_mm_fastpath:
-	cpumask_set_cpu(cpu, mm_cpumask(mm));
 	cpu_switch_mm(mm->pgd, mm);
 }