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-rw-r--r--arch/sparc64/kernel/smp.c31
1 files changed, 5 insertions, 26 deletions
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index b137fd63f5e1..a9089e2140e9 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -883,34 +883,13 @@ void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long
883 u32 ctx = CTX_HWBITS(mm->context); 883 u32 ctx = CTX_HWBITS(mm->context);
884 int cpu = get_cpu(); 884 int cpu = get_cpu();
885 885
886 if (mm == current->active_mm && atomic_read(&mm->mm_users) == 1) { 886 if (mm == current->active_mm && atomic_read(&mm->mm_users) == 1)
887 mm->cpu_vm_mask = cpumask_of_cpu(cpu); 887 mm->cpu_vm_mask = cpumask_of_cpu(cpu);
888 goto local_flush_and_out; 888 else
889 } else { 889 smp_cross_call_masked(&xcall_flush_tlb_pending,
890 /* This optimization is not valid. Normally 890 ctx, nr, (unsigned long) vaddrs,
891 * we will be holding the page_table_lock, but 891 mm->cpu_vm_mask);
892 * there is an exception which is copy_page_range()
893 * when forking. The lock is held during the individual
894 * page table updates in the parent, but not at the
895 * top level, which is where we are invoked.
896 */
897 if (0) {
898 cpumask_t this_cpu_mask = cpumask_of_cpu(cpu);
899
900 /* By virtue of running under the mm->page_table_lock,
901 * and mmu_context.h:switch_mm doing the same, the
902 * following operation is safe.
903 */
904 if (cpus_equal(mm->cpu_vm_mask, this_cpu_mask))
905 goto local_flush_and_out;
906 }
907 }
908
909 smp_cross_call_masked(&xcall_flush_tlb_pending,
910 ctx, nr, (unsigned long) vaddrs,
911 mm->cpu_vm_mask);
912 892
913local_flush_and_out:
914 __flush_tlb_pending(ctx, nr, vaddrs); 893 __flush_tlb_pending(ctx, nr, vaddrs);
915 894
916 put_cpu(); 895 put_cpu();