lkml.org 
[lkml]   [2013]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] drivers/block/xsysace - replace in(out)_8/in(out)_be16/in(out)_le16 with generic iowrite(read)8/16(be)
Date
On Wednesday 06 February 2013, Grant Likely wrote:
> The only problem that I see is that the ARM and Microblaze
> ioread16be/iowrite16be helpers are missing barriers which smells like
> a bug and should be fixed.

It looks correct to me on ARM, we use the same barriers in ioread and
iowrite that we use in readl/writel.

Microblaze uses no barriers in any of the I/O accessor families
(readl, ioread32, in_le32, inl, inl_p), so it presumably doesn't
require any because it is fully ordered, at least changing from
in_le32 to ioread32 won't make it worse.
On a related note, the inb/outb style accessors are bogus on microblaze
and should be removed, but that is a different discussion. I should
have updated my old patches to introduce a meaningful CONFIG_NO_IOPORT
ages ago, and without them it probably breaks.

Arnd


\
 
 \ /
  Last update: 2013-02-06 21:47    [W:0.176 / U:2.388 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site