cpumask: use cpumask_var_t in uv_flush_tlb_others.

Impact: remove cpumask_t, reduce per-cpu size for CONFIG_CPUMASK_OFFSTACK=y

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 7 insertions, 2 deletions

diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index d038b9c45cf8..8afb69180c9b 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -275,6 +275,8 @@ const struct cpumask *uv_flush_send_and_wait(int cpu, int this_blade,
         return NULL;
 }
 
+static DEFINE_PER_CPU(cpumask_var_t, uv_flush_tlb_mask);
+
 /**
  * uv_flush_tlb_others - globally purge translation cache of a virtual
  * address or all TLB's
@@ -304,8 +306,7 @@ const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
                                           struct mm_struct *mm,
                                           unsigned long va, unsigned int cpu)
 {
-        static DEFINE_PER_CPU(cpumask_t, flush_tlb_mask);
-        struct cpumask *flush_mask = &__get_cpu_var(flush_tlb_mask);
+        struct cpumask *flush_mask = __get_cpu_var(uv_flush_tlb_mask);
         int i;
         int bit;
         int blade;
@@ -755,6 +756,10 @@ static int __init uv_bau_init(void)
         if (!is_uv_system())
                 return 0;
 
+        for_each_possible_cpu(cur_cpu)
+                alloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask, cur_cpu),
+                                       GFP_KERNEL, cpu_to_node(cur_cpu));
+
         uv_bau_retry_limit = 1;
         uv_nshift = uv_hub_info->n_val;
         uv_mmask = (1UL << uv_hub_info->n_val) - 1;