X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fia64%2Fsn%2Fkernel%2Fsn2%2Fsn2_smp.c;fp=arch%2Fia64%2Fsn%2Fkernel%2Fsn2%2Fsn2_smp.c;h=b2e1e746b47fca6ebbda649e50077ce56127c2f2;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=d9d306c79f2d7a1743369380e637c4118d012c22;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git

diff --git a/arch/ia64/sn/kernel/sn2/sn2_smp.c b/arch/ia64/sn/kernel/sn2/sn2_smp.c
index d9d306c79..b2e1e746b 100644
--- a/arch/ia64/sn/kernel/sn2/sn2_smp.c
+++ b/arch/ia64/sn/kernel/sn2/sn2_smp.c
@@ -93,27 +93,6 @@ static inline unsigned long wait_piowc(void)
 	return (ws & SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK) != 0;
 }
 
-/**
- * sn_migrate - SN-specific task migration actions
- * @task: Task being migrated to new CPU
- *
- * SN2 PIO writes from separate CPUs are not guaranteed to arrive in order.
- * Context switching user threads which have memory-mapped MMIO may cause
- * PIOs to issue from seperate CPUs, thus the PIO writes must be drained
- * from the previous CPU's Shub before execution resumes on the new CPU.
- */
-void sn_migrate(struct task_struct *task)
-{
-	pda_t *last_pda = pdacpu(task_thread_info(task)->last_cpu);
-	volatile unsigned long *adr = last_pda->pio_write_status_addr;
-	unsigned long val = last_pda->pio_write_status_val;
-
-	/* Drain PIO writes from old CPU's Shub */
-	while (unlikely((*adr & SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK)
-			!= val))
-		cpu_relax();
-}
-
 void sn_tlb_migrate_finish(struct mm_struct *mm)
 {
 	/* flush_tlb_mm is inefficient if more than 1 users of mm */