UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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@marvell.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/1415773374-4629-2-git-send-email-jszhang@marvell.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Jisheng Zhang 2014-11-12 14:22:52 +08:00 committed by Jason Cooper
parent 377df64a16
commit 8876ce7d1c
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/irqchip/irq-dw-apb-ictl.c
View File

@ -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);