x86: change flush_tlb_others to take a const struct cpumask

[linux-2.6-omap-h63xx.git] / arch / x86 / xen / enlighten.c

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index bea215230b20cdf4fc41ac5fd4e060dcbaec4ec1..965539ec425f530e2c08309b7b9c9777078b8776 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -634,35 +634,27 @@ static void xen_flush_tlb_single(unsigned long addr)
        preempt_enable();
 }
 
-static void xen_flush_tlb_others(const cpumask_t *cpus, struct mm_struct *mm,
-                                unsigned long va)
+static void xen_flush_tlb_others(const struct cpumask *cpus,
+                                struct mm_struct *mm, unsigned long va)
 {
        struct {
                struct mmuext_op op;
-               cpumask_t mask;
+               DECLARE_BITMAP(mask, NR_CPUS);
        } *args;
-       cpumask_t cpumask = *cpus;
        struct multicall_space mcs;
 
-       /*
-        * A couple of (to be removed) sanity checks:
-        *
-        * - current CPU must not be in mask
-        * - mask must exist :)
-        */
-       BUG_ON(cpus_empty(cpumask));
-       BUG_ON(cpu_isset(smp_processor_id(), cpumask));
+       BUG_ON(cpumask_empty(cpus));
        BUG_ON(!mm);
 
-       /* If a CPU which we ran on has gone down, OK. */
-       cpus_and(cpumask, cpumask, cpu_online_map);
-       if (cpus_empty(cpumask))
-               return;
-
        mcs = xen_mc_entry(sizeof(*args));
        args = mcs.args;
-       args->mask = cpumask;
-       args->op.arg2.vcpumask = &args->mask;
+       args->op.arg2.vcpumask = to_cpumask(args->mask);
+
+       /* Remove us, and any offline CPUS. */
+       cpumask_and(to_cpumask(args->mask), cpus, cpu_online_mask);
+       cpumask_clear_cpu(smp_processor_id(), to_cpumask(args->mask));
+       if (unlikely(cpumask_empty(to_cpumask(args->mask))))
+               goto issue;
 
        if (va == TLB_FLUSH_ALL) {
                args->op.cmd = MMUEXT_TLB_FLUSH_MULTI;
@@ -673,6 +665,7 @@ static void xen_flush_tlb_others(const cpumask_t *cpus, struct mm_struct *mm,
 
        MULTI_mmuext_op(mcs.mc, &args->op, 1, NULL, DOMID_SELF);
 
+issue:
        xen_mc_issue(PARAVIRT_LAZY_MMU);
 }