> On Jul 2, 2015, at 11:49 AM, Luis R. Rodriguez wrote:
>
> On Sat, Jun 27, 2015 at 08:00:48AM +1000, Benjamin Herrenschmidt wrote:
>> On Fri, 2015-06-26 at 16:24 +0000, Casey Leedom wrote:
>>> Thanks for looking into this Ben. As it stands now, it seems as
>&g
to
eliminate a wasteful attempt to use write combining on those
architectures where it didn't work.
Casey
From: Benjamin Herrenschmidt [b...@kernel.crashing.org]
Sent: Thursday, June 25, 2015 7:02 PM
To: Casey Leedom
Cc: Arnd Bergmann; Luis R. Rodr
| From: Arnd Bergmann [a...@arndb.de]
| Sent: Thursday, June 25, 2015 1:44 PM
|
| On Thursday 25 June 2015 15:01:56 Casey Leedom wrote:
| >
| > Is there a reference I can read on this so I can understand
| > when and where we can use the __raw_*() APIs? Can these
| > Raw Read/Writ
/ From: Benjamin Herrenschmidt [b...@kernel.crashing.org]
| Sent: Wednesday, June 24, 2015 4:38 PM
|
| It is to be noted that on powerpc at least, writel() and co will never
| combine due to the memory barriers in them. Only "normal" stores (or
\ __raw_writel) will.
/ From: Benjamin Herrenschmidt
