Commit c301a2e2 authored by Thomas Weißschuh's avatar Thomas Weißschuh Committed by Greg Kroah-Hartman
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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: default avatarThomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20251029-sysfs-const-attr-prep-v5-5-ea7d745acff4@weissschuh.net


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7dd9fdb4
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+16 −1
Original line number Diff line number Diff line
@@ -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