lkml.org 
[lkml]   [2007]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] sysfs: add filter function to groups
Cornelia Huck wrote:
> On Wed, 31 Oct 2007 10:52:35 +0100,
> Stefan Richter <stefanr@s5r6.in-berlin.de> wrote:
>> if (!grp->is_visible ||
>> grp->is_visible(kobj, *attr, i))
>> add or remove();
>>
>
> Hm, I find that a bit harder to parse...

if (grp->is_visible == NULL ||
grp->is_visible(kobj, *attr, i))
add or remove();

However, how beautiful the implementation of static void remove_files()
and static int create_files() looks doesn't matter. What's important is
that

struct attribute_group {
const char *name;
+ int (*is_visible)(struct kobject *,
+ struct attribute *, int);
struct attribute **attrs;
};

makes sense to users --- because this is the API.

[BTW, like most of the existing driver core APIs, there are kerneldoc
comments missing here.]

> mask_out() would also imply that the common use case is to have all
> attributes in the group created and that you need to take action to
> have an attribute not created.

Here you have a point. But James has a point too when he says:
| We basically want to show capability by which file is present.

Anyway, /if/ the reverse logic is preferred, it shouldn't be called
"mask_out()" but rather "is_masked()" or "is_hidden()" or the like.
--
Stefan Richter
-=====-=-=== =-=- =====
http://arcgraph.de/sr/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-10-31 11:43    [W:0.050 / U:0.356 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site