diff options
| author | Thomas Weißschuh <linux@weissschuh.net> | 2025-10-29 09:12:14 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-26 15:16:35 +0100 |
| commit | c301a2e2d78c2c20d466c7e38568406471ede17d (patch) | |
| tree | 8310b09aae0fed199919929612a7e97cf276af0c /samples | |
| parent | 7dd9fdb4939b972c1d0523e94fb3f70789653f0c (diff) | |
samples/kobject: add is_visible() callback to attribute group
There was no example for the is_visible() callback so far.
It will also become an example and test for the constification of
'struct attribute' later.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20251029-sysfs-const-attr-prep-v5-5-ea7d745acff4@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/kobject/kset-example.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/samples/kobject/kset-example.c b/samples/kobject/kset-example.c index 579ce150217c..1aac595ed949 100644 --- a/samples/kobject/kset-example.c +++ b/samples/kobject/kset-example.c @@ -178,7 +178,22 @@ static struct attribute *foo_default_attrs[] = { &bar_attribute.attr, NULL, /* need to NULL terminate the list of attributes */ }; -ATTRIBUTE_GROUPS(foo_default); + +static umode_t foo_default_attrs_is_visible(struct kobject *kobj, + struct attribute *attr, + int n) +{ + /* Hide attributes with the same name as the kobject. */ + if (strcmp(kobject_name(kobj), attr->name) == 0) + return 0; + return attr->mode; +} + +static const struct attribute_group foo_default_group = { + .attrs = foo_default_attrs, + .is_visible = foo_default_attrs_is_visible, +}; +__ATTRIBUTE_GROUPS(foo_default); /* * Our own ktype for our kobjects. Here we specify our sysfs ops, the |