From e323969ccda2d69f02e047c08b03faa09215c72a Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Mon, 28 Nov 2011 15:59:10 +0000 Subject: ARM: Remove current_mm per-cpu variable The current_mm variable was used to store the new mm between the switch_mm() and switch_to() calls where an IPI to reset the context could have set the wrong mm. Since the interrupts are disabled during context switch, there is no need for this variable, current->active_mm already points to the current mm when interrupts are re-enabled. Reviewed-by: Will Deacon Tested-by: Will Deacon Reviewed-by: Frank Rowand Tested-by: Marc Zyngier Signed-off-by: Catalin Marinas --- arch/arm/mm/context.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'arch/arm/mm') diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c index 06a2e7ce23c3..806cc4f63516 100644 --- a/arch/arm/mm/context.c +++ b/arch/arm/mm/context.c @@ -18,9 +18,6 @@ static DEFINE_RAW_SPINLOCK(cpu_asid_lock); unsigned int cpu_last_asid = ASID_FIRST_VERSION; -#ifdef CONFIG_SMP -DEFINE_PER_CPU(struct mm_struct *, current_mm); -#endif #ifdef CONFIG_ARM_LPAE void cpu_set_reserved_ttbr0(void) @@ -108,14 +105,7 @@ static void reset_context(void *info) { unsigned int asid; unsigned int cpu = smp_processor_id(); - struct mm_struct *mm = per_cpu(current_mm, cpu); - - /* - * Check if a current_mm was set on this CPU as it might still - * be in the early booting stages and using the reserved ASID. - */ - if (!mm) - return; + struct mm_struct *mm = current->active_mm; smp_rmb(); asid = cpu_last_asid + cpu + 1; -- cgit v1.2.3