[v2] cifs: Use kstrtobool() instead of strtobool()

strtobool() is the same as kstrtobool().
However, the latter is more used within the kernel.

In order to remove strtobool() and slightly simplify kstrtox.h, switch to
the other function name.

While at it, include the corresponding header file (<linux/kstrtox.h>)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
This patch was already sent as a part of a serie ([1]) that axed all usages
of strtobool().
Most of the patches have been merged in -next.

I synch'ed with latest -next and re-send the remaining ones as individual
patches.

Changes in v2:
  - synch with latest -next.

[1]: https://lore.kernel.org/all/cover.1667336095.git.christophe.jaillet@wanadoo.fr/

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 fs/cifs/cifs_debug.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

merged into cifs-2.6.git for-next

On Sat, Jan 14, 2023 at 2:58 AM Christophe JAILLET
<christophe.jaillet@wanadoo.fr> wrote:
>
> strtobool() is the same as kstrtobool().
> However, the latter is more used within the kernel.
>
> In order to remove strtobool() and slightly simplify kstrtox.h, switch to
> the other function name.
>
> While at it, include the corresponding header file (<linux/kstrtox.h>)
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> This patch was already sent as a part of a serie ([1]) that axed all usages
> of strtobool().
> Most of the patches have been merged in -next.
>
> I synch'ed with latest -next and re-send the remaining ones as individual
> patches.
>
> Changes in v2:
>   - synch with latest -next.
>
> [1]: https://lore.kernel.org/all/cover.1667336095.git.christophe.jaillet@wanadoo.fr/
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
>  fs/cifs/cifs_debug.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
> index 56b23def4c95..612f0bb284c9 100644
> --- a/fs/cifs/cifs_debug.c
> +++ b/fs/cifs/cifs_debug.c
> @@ -8,6 +8,7 @@
>  #include <linux/fs.h>
>  #include <linux/string.h>
>  #include <linux/ctype.h>
> +#include <linux/kstrtox.h>
>  #include <linux/module.h>
>  #include <linux/proc_fs.h>
>  #include <linux/uaccess.h>
> @@ -787,7 +788,7 @@ static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
>         rc = get_user(c[0], buffer);
>         if (rc)
>                 return rc;
> -       if (strtobool(c, &bv) == 0)
> +       if (kstrtobool(c, &bv) == 0)
>                 cifsFYI = bv;
>         else if ((c[0] > '1') && (c[0] <= '9'))
>                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
> @@ -947,7 +948,7 @@ static ssize_t cifs_security_flags_proc_write(struct file *file,
>
>         if (count < 3) {
>                 /* single char or single char followed by null */
> -               if (strtobool(flags_string, &bv) == 0) {
> +               if (kstrtobool(flags_string, &bv) == 0) {
>                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
>                         return count;
>                 } else if (!isdigit(flags_string[0])) {
> --
> 2.34.1
>