On Sun, 27 Feb 2022 18:10:39 +0000 "Dr. David Alan Gilbert" <linux@xxxxxxxxxxx> wrote:
> Use strtobool rather than open coding "on" and "off" parsing in
> mm/hugetlb_vmemmap.c and mm/page_table_check.c.
>
> Signed-off-by: Dr. David Alan Gilbert <linux@xxxxxxxxxxx>
> ---
> mm/hugetlb_vmemmap.c | 12 +-----------
> mm/page_table_check.c | 10 +---------
> 2 files changed, 2 insertions(+), 20 deletions(-)
>
> diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
> index c540c21e26f5b..919411386e547 100644
> --- a/mm/hugetlb_vmemmap.c
> +++ b/mm/hugetlb_vmemmap.c
> @@ -192,17 +192,7 @@ static int __init early_hugetlb_free_vmemmap_param(char *buf)
> return 0;
> }
>
> - if (!buf)
> - return -EINVAL;
> -
> - if (!strcmp(buf, "on"))
> - hugetlb_free_vmemmap_enabled = true;
> - else if (!strcmp(buf, "off"))
> - hugetlb_free_vmemmap_enabled = false;
> - else
> - return -EINVAL;
> -
> - return 0;
> + return strtobool(buf, &hugetlb_free_vmemmap_enabled);
> }
> early_param("hugetlb_free_vmemmap", early_hugetlb_free_vmemmap_param);
This part falls afoul of the changes in
https://lkml.kernel.org/r/20211101031651.75851-3-songmuchun@xxxxxxxxxxxxx
> diff --git a/mm/page_table_check.c b/mm/page_table_check.c
> index 3763bd077861a..2458281bff893 100644
> --- a/mm/page_table_check.c
> +++ b/mm/page_table_check.c
> @@ -23,15 +23,7 @@ EXPORT_SYMBOL(page_table_check_disabled);
>
> static int __init early_page_table_check_param(char *buf)
> {
> - if (!buf)
> - return -EINVAL;
> -
> - if (strcmp(buf, "on") == 0)
> - __page_table_check_enabled = true;
> - else if (strcmp(buf, "off") == 0)
> - __page_table_check_enabled = false;
> -
> - return 0;
> + return strtobool(buf, &__page_table_check_enabled);
> }
But this works OK.
