diff options
| author | Jack Steiner <steiner@sgi.com> | 2005-08-11 10:28:00 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-08-17 15:31:53 -0700 |
| commit | 68b9753f47953930cb94de0223c163f289399091 (patch) | |
| tree | d30b9def802b154eef00c8e9fc1dc35ddf0631e6 /arch/ia64/sn | |
| parent | 7e95b9d6e21eda23bac1ff024d465d2072c8996d (diff) | |
[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>
Diffstat (limited to 'arch/ia64/sn')
| -rw-r--r-- | arch/ia64/sn/kernel/bte.c | 1 | ||||
| -rw-r--r-- | arch/ia64/sn/kernel/huberror.c | 2 | ||||
| -rw-r--r-- | arch/ia64/sn/pci/pcibr/pcibr_dma.c | 3 |
3 files changed, 4 insertions, 2 deletions
diff --git a/arch/ia64/sn/kernel/bte.c b/arch/ia64/sn/kernel/bte.c index 7adef84190d..b75814efadb 100644 --- a/arch/ia64/sn/kernel/bte.c +++ b/arch/ia64/sn/kernel/bte.c @@ -215,6 +215,7 @@ retry_bteop: } while ((transfer_stat = *bte->most_rcnt_na) == BTE_WORD_BUSY) { + cpu_relax(); if (ia64_get_itc() > itc_end) { BTE_PRINTK(("BTE timeout nasid 0x%x bte%d IBLS = 0x%lx na 0x%lx\n", NASID_GET(bte->bte_base_addr), bte->bte_num, diff --git a/arch/ia64/sn/kernel/huberror.c b/arch/ia64/sn/kernel/huberror.c index 5c39b43ba3c..5c5eb01c50f 100644 --- a/arch/ia64/sn/kernel/huberror.c +++ b/arch/ia64/sn/kernel/huberror.c @@ -76,7 +76,7 @@ void hubiio_crb_free(struct hubdev_info *hubdev_info, int crbnum) */ REMOTE_HUB_S(hubdev_info->hdi_nasid, IIO_ICDR, (IIO_ICDR_PND | crbnum)); while (REMOTE_HUB_L(hubdev_info->hdi_nasid, IIO_ICDR) & IIO_ICDR_PND) - udelay(1); + cpu_relax(); } diff --git a/arch/ia64/sn/pci/pcibr/pcibr_dma.c b/arch/ia64/sn/pci/pcibr/pcibr_dma.c index 0f254255f6a..34093476e96 100644 --- a/arch/ia64/sn/pci/pcibr/pcibr_dma.c +++ b/arch/ia64/sn/pci/pcibr/pcibr_dma.c @@ -317,7 +317,8 @@ void sn_dma_flush(uint64_t addr) *(volatile uint32_t *)(p->sfdl_force_int_addr) = 1; /* wait for the interrupt to come back. */ - while (*(p->sfdl_flush_addr) != 0x10f) ; + while (*(p->sfdl_flush_addr) != 0x10f) + cpu_relax(); /* okay, everything is synched up. */ spin_unlock_irqrestore((spinlock_t *)&p->sfdl_flush_lock, flags); |