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authorJack Steiner <steiner@sgi.com>2005-08-11 19:28:00 +0200
committerTony Luck <tony.luck@intel.com>2005-08-18 00:31:53 +0200
commit68b9753f47953930cb94de0223c163f289399091 (patch)
treed30b9def802b154eef00c8e9fc1dc35ddf0631e6 /arch/ia64
parent[IA64-SGI] - New SN hardware support - bte_fixes (diff)
downloadlinux-68b9753f47953930cb94de0223c163f289399091.tar.xz
linux-68b9753f47953930cb94de0223c163f289399091.zip
[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')
-rw-r--r--arch/ia64/sn/kernel/bte.c1
-rw-r--r--arch/ia64/sn/kernel/huberror.c2
-rw-r--r--arch/ia64/sn/pci/pcibr/pcibr_dma.c3
3 files changed, 4 insertions, 2 deletions
diff --git a/arch/ia64/sn/kernel/bte.c b/arch/ia64/sn/kernel/bte.c
index 7adef84190db..b75814efadba 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 5c39b43ba3c0..5c5eb01c50f0 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 0f254255f6a1..34093476e965 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);