On 15 September 2014 01:31, Russell King - ARM Linux
[off-list ref] wrote:

On Tue, Sep 09, 2014 at 03:26:56PM +0530, Ankit Jindal wrote:

quoted

This patch update UIO documentation for new mem region
type UIO_MEM_PHYS_CACHE.

Signed-off-by: Ankit Jindal <redacted>
Signed-off-by: Tushar Jagad <redacted>
---
 Documentation/DocBook/uio-howto.tmpl |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/DocBook/uio-howto.tmpl b/Documentation/DocBook/uio-howto.tmpl
index bbe9c1f..49e47d4 100644
--- a/Documentation/DocBook/uio-howto.tmpl
+++ b/Documentation/DocBook/uio-howto.tmpl

@@ -530,7 +530,8 @@ the memory region, it will show up in the corresponding sysfs node.
 <varname>UIO_MEM_PHYS</varname> if you you have physical memory on your
 card to be mapped. Use <varname>UIO_MEM_LOGICAL</varname> for logical
 memory (e.g. allocated with <function>kmalloc()</function>). There's also
-<varname>UIO_MEM_VIRTUAL</varname> for virtual memory.
+<varname>UIO_MEM_VIRTUAL</varname> for virtual memory and
+<varname>UIO_MEM_PHYS_CACHE</varname> for physical cacheable memory.

When I read this, I wondered what "physical cacheable memory" was.
Then I found that what you're doing with this is mapping physical
memory into userspace with cacheable attributes.

So, to avoid confusion, this should be "for physical memory, which
will be cacheably mapped" or similar.

Thanks, will frame better in next version.

Thanks,
Ankit