[IA64-SGI] - New SN hardware support - cpu_relax
Add a few missing calls to "hint @pause". Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
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@ -215,6 +215,7 @@ retry_bteop:
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}
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while ((transfer_stat = *bte->most_rcnt_na) == BTE_WORD_BUSY) {
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cpu_relax();
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if (ia64_get_itc() > itc_end) {
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BTE_PRINTK(("BTE timeout nasid 0x%x bte%d IBLS = 0x%lx na 0x%lx\n",
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NASID_GET(bte->bte_base_addr), bte->bte_num,
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@ -76,7 +76,7 @@ void hubiio_crb_free(struct hubdev_info *hubdev_info, int crbnum)
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*/
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REMOTE_HUB_S(hubdev_info->hdi_nasid, IIO_ICDR, (IIO_ICDR_PND | crbnum));
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while (REMOTE_HUB_L(hubdev_info->hdi_nasid, IIO_ICDR) & IIO_ICDR_PND)
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udelay(1);
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cpu_relax();
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}
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@ -317,7 +317,8 @@ void sn_dma_flush(uint64_t addr)
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*(volatile uint32_t *)(p->sfdl_force_int_addr) = 1;
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/* wait for the interrupt to come back. */
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while (*(p->sfdl_flush_addr) != 0x10f) ;
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while (*(p->sfdl_flush_addr) != 0x10f)
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cpu_relax();
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/* okay, everything is synched up. */
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spin_unlock_irqrestore((spinlock_t *)&p->sfdl_flush_lock, flags);
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@ -749,7 +749,8 @@ ia64_sn_power_down(void)
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{
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struct ia64_sal_retval ret_stuff;
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SAL_CALL(ret_stuff, SN_SAL_SYSTEM_POWER_DOWN, 0, 0, 0, 0, 0, 0, 0);
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while(1);
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while(1)
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cpu_relax();
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/* never returns */
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}
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