Messages in this thread Patch in this message | | | From | Andy Lutomirski <> | Subject | [RFC 10/13] x86/mm: Factor out remote TLB flushing | Date | Fri, 8 Jan 2016 15:15:28 -0800 |
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There are three call sites that propagate TLB flushes, and they all do exactly the same thing. Factor the code out into a helper.
Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/mm/tlb.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 8f4cc3dfac32..b208a33571b0 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -154,6 +154,14 @@ void native_flush_tlb_others(const struct cpumask *cpumask, smp_call_function_many(cpumask, flush_tlb_func, &info, 1); } +static void propagate_tlb_flush(unsigned int this_cpu, + struct mm_struct *mm, unsigned long start, + unsigned long end) +{ + if (cpumask_any_but(mm_cpumask(mm), this_cpu) < nr_cpu_ids) + flush_tlb_others(mm_cpumask(mm), mm, 0UL, TLB_FLUSH_ALL); +} + void flush_tlb_current_task(void) { struct mm_struct *mm = current->mm; @@ -166,8 +174,7 @@ void flush_tlb_current_task(void) local_flush_tlb(); trace_tlb_flush(TLB_LOCAL_SHOOTDOWN, TLB_FLUSH_ALL); - if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids) - flush_tlb_others(mm_cpumask(mm), mm, 0UL, TLB_FLUSH_ALL); + propagate_tlb_flush(smp_processor_id(), mm, 0UL, TLB_FLUSH_ALL); preempt_enable(); } @@ -231,8 +238,7 @@ out: start = 0UL; end = TLB_FLUSH_ALL; } - if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids) - flush_tlb_others(mm_cpumask(mm), mm, start, end); + propagate_tlb_flush(smp_processor_id(), mm, start, end); preempt_enable(); } @@ -257,8 +263,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long start) } } - if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids) - flush_tlb_others(mm_cpumask(mm), mm, start, 0UL); + propagate_tlb_flush(smp_processor_id(), mm, start, 0UL); preempt_enable(); } -- 2.5.0
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