Re: [RFC PATCH v2 11/17] mm/damon/sysfs: implement probe prep directory

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
- [Low] Missing `static` qualifier for `damon_sysfs_prep_ktype`.
- [Low] The `name` field in `struct damon_sysfs_prep_action_name` is declared as a non-const `char *` but initialized with read-only string literals.
--

--- Patch [11]: [RFC PATCH v2 11/17] mm/damon/sysfs: implement probe prep directory ---
commit ec46e0d8618f958d1edbf7e0edacd883d4e30bde
Author: SJ Park <sj@kernel.org>

mm/damon/sysfs: implement probe prep directory

This commit implements the DAMON sysfs directory and files for specifying each
probe prep action. It introduces the preparatory data structures and functions,
though the files are not yet created under sysfs.

> diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
> index 38affef08d0fb..a33423d997f59 100644
> --- a/mm/damon/sysfs.c
> +++ b/mm/damon/sysfs.c
> @@ -750,6 +750,89 @@ static const struct kobj_type damon_sysfs_intervals_ktype = {

[ ... ]

> +struct damon_sysfs_prep_action_name {
> +	enum damon_prep_action action;
> +	char *name;

[Severity: Low]
This isn't a bug, but should this field be a const char * instead of
char *? The damon_sysfs_prep_action_names array initializes it with
read-only string literals like "set_pgidle".

> +};
> +
> +static const struct damon_sysfs_prep_action_name
> +damon_sysfs_prep_action_names[] = {
> +	{
> +		.action = DAMON_PREP_SET_PGIDLE,
> +		.name = "set_pgidle",
> +	},
> +};

[ ... ]

> +static struct attribute *damon_sysfs_prep_attrs[] = {
> +	&damon_sysfs_prep_prep_action_attr.attr,
> +	NULL,
> +};
> +ATTRIBUTE_GROUPS(damon_sysfs_prep);
> +
> +const struct kobj_type damon_sysfs_prep_ktype = {

[Severity: Low]
This isn't a bug, but is the static qualifier missing here? Without it,
damon_sysfs_prep_ktype is exported globally which might trigger build
warnings like -Wmissing-prototypes when compiling with W=1.

> +	.release = damon_sysfs_prep_release,
> +	.sysfs_ops = &kobj_sysfs_ops,
> +	.default_groups = damon_sysfs_prep_groups,
> +};

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260726173935.94046-1-sj@kernel.org?part=11