[PATCH v1] apparmor: Convert to use match_string() helper

[J Freyensee]

return 0;
> -		}
> -	}
> +	i = match_string(audit_mode_names, AUDIT_MAX_INDEX, val);
> +	if (i < 0)
> +		return -EINVAL;


Slight nitpick: according to the Linux kernel documentation, 
match_string() will return -EINVAL on failure.  You could probably just 
return 'i' if it's less than 0 and not explicitly return -EINVAL.

But good job replacing the code with a re-usable library call :-).

Reviewed-by: Jay Freyensee <why2jjj.linux at gmail.com>

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