> case Opt_pid:
> + {
> + int rc;
> +
> if (0 == match_strlcpy(str, &args[0], sizeof(str)))
> return -EINVAL;
> - opts->pid = simple_strtoull(str, NULL, 0);
> + rc = kstrtoull(str, 0, &opts->pid);
> + if (rc)
> + return rc;
kstrto*() functions were designed for proc/sysfs/sysctl/debugfs/...
files accepting 1 value from shell:
echo 42 >/proc/foo
To keep this simplest usecase simple kstrto*() functions accept
one optional newline character before mandatory NUL.
But in mount option parsing newlines aren't supposed to be.
I'll resend parse_integer() shortly which is better suited for such code
http://marc.info/?l=linux-kernel&m=142876674416451&w=4
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