Commit-ID: 8876ce7d1cbaca495bd6dee96d371f98e9cfb1eb
Gitweb: http://git.kernel.org/tip/8876ce7d1cbaca495bd6dee96d371f98e9cfb1eb
Author: Jisheng Zhang <jszhang@xxxxxxxxxxx>
AuthorDate: Wed, 12 Nov 2014 14:22:52 +0800
Committer: Jason Cooper <jason@xxxxxxxxxxxxxx>
CommitDate: Wed, 26 Nov 2014 16:07:41 +0000
irqchip: dw-apb-ictl: Always use use {readl|writel}_relaxed
There's no DMA at all, the device type memory attribute can ensure the
operations order and relaxed version imply compiler barrier, so we are safe
to use relaxed version to improve the performance a bit.
Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxxx>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
Link: https://lkml.kernel.org/r/1415773374-4629-2-git-send-email-jszhang@xxxxxxxxxxx
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
---
drivers/irqchip/irq-dw-apb-ictl.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/irqchip/irq-dw-apb-ictl.c b/drivers/irqchip/irq-dw-apb-ictl.c
index 31e231e..fcc3385 100644
--- a/drivers/irqchip/irq-dw-apb-ictl.c
+++ b/drivers/irqchip/irq-dw-apb-ictl.c
@@ -94,16 +94,16 @@ static int __init dw_apb_ictl_init(struct device_node *np,
*/
/* mask and enable all interrupts */
- writel(~0, iobase + APB_INT_MASK_L);
- writel(~0, iobase + APB_INT_MASK_H);
- writel(~0, iobase + APB_INT_ENABLE_L);
- writel(~0, iobase + APB_INT_ENABLE_H);
+ writel_relaxed(~0, iobase + APB_INT_MASK_L);
+ writel_relaxed(~0, iobase + APB_INT_MASK_H);
+ writel_relaxed(~0, iobase + APB_INT_ENABLE_L);
+ writel_relaxed(~0, iobase + APB_INT_ENABLE_H);
- reg = readl(iobase + APB_INT_ENABLE_H);
+ reg = readl_relaxed(iobase + APB_INT_ENABLE_H);
if (reg)
nrirqs = 32 + fls(reg);
else
- nrirqs = fls(readl(iobase + APB_INT_ENABLE_L));
+ nrirqs = fls(readl_relaxed(iobase + APB_INT_ENABLE_L));
domain = irq_domain_add_linear(np, nrirqs,
&irq_generic_chip_ops, NULL);
--
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