On Tue, Apr 26, 2022 at 11:32:02PM +0530, Jagdish Gediya wrote:
> At many places in kernel, It is necessary to convert sysfs input
> to corrosponding bool value e.g. "false" or "0" need to be converted
corresponding
> to bool false, "true" or "1" need to be converted to bool true,
> places where such conversion is needed currently check the input
> string manually, kstrtobool() can be utilized at such places but
> currently it doesn't have support to accept "false"/"true".
>
> Add support to accept "false"/"true" as valid string in kstrtobool().
Andrew, this patch still needs a bit of work.
> Signed-off-by: Jagdish Gediya <jvgediya@xxxxxxxxxxxxx>
> Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> ---
> Chnages in v2:
> - kstrtobool to kstrtobool() in commit message.
> - Split single patch into 2
> - Remove strcmp usage from kstrtobool() and instead compare 1st
> character only.
>
> Changes in v3:
> - Covert -> Convert in patch 2 subject
> - Collected Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
>
> lib/kstrtox.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/lib/kstrtox.c b/lib/kstrtox.c
> index 886510d248e5..465e31e4d70d 100644
> --- a/lib/kstrtox.c
> +++ b/lib/kstrtox.c
> @@ -340,7 +340,7 @@ EXPORT_SYMBOL(kstrtos8);
> * @s: input string
> * @res: result
> *
> - * This routine returns 0 iff the first character is one of 'Yy1Nn0', or
> + * This routine returns 0 if the first character is one of 'YyTt1NnFf0', or
s/if/iff/ please. It's _not_ a typo!
> * [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL. Value
> * pointed to by res is updated upon finding a match.
> */
> @@ -353,11 +353,15 @@ int kstrtobool(const char *s, bool *res)
> switch (s[0]) {
> case 'y':
> case 'Y':
> + case 't':
> + case 'T':
> case '1':
> *res = true;
> return 0;
> case 'n':
> case 'N':
> + case 'f':
> + case 'F':
> case '0':
> *res = false;
> return 0;
> --
> 2.35.1
>
--
With Best Regards,
Andy Shevchenko
