[PATCH] get_options to allow a hypenated range for isolcpus

			Format: <RDP>,<reset>,<pci_scan>,<verbosity>

	isolcpus=	[KNL,SMP] Isolate CPUs from the general scheduler.

			Format: <cpu number>,...,<cpu number>

			Format:

			<cpu number>,...,<cpu number>

			or

			<cpu number>-<cpu number>  (must be a positive range in ascending order)

			or a mixture

			<cpu number>,...,<cpu number>-<cpu number>

			This option can be used to specify one or more CPUs

			to isolate from the general SMP balancing and scheduling

			algorithms. The only way to move a process onto or off

#include <linux/kernel.h>

#include <linux/string.h>

/*

 *	If a hyphen was found in get_option, this will handle the

 *	range of numbers, M-N.  This will expand the range and insert

 *	the values[M, M+1, ..., N] into the ints array in get_options.

 */

static int get_range(char **str, int *pint)

{

	int x, inc_counter, upper_range;

	(*str)++;

	upper_range = simple_strtol((*str), NULL, 0);

	inc_counter = upper_range - *pint;

	for (x = *pint; x < upper_range; x++)

		*pint++ = x;

	return inc_counter;

}

/**

 *	get_option - Parse integer from an option string

 *	0 : no int in string

 *	1 : int found, no subsequent comma

 *	2 : int found including a subsequent comma

 *	3 : hyphen found to denote a range

 */

int get_option (char **str, int *pint)

		(*str)++;

		return 2;

	}

	if (**str == '-')

		return 3;

	return 1;

}

 *	@ints: integer array

 *

 *	This function parses a string containing a comma-separated

 *	list of integers.  The parse halts when the array is

 *	list of integers, a hyphen-separated range of _positive_ integers,

 *	or a combination of both.  The parse halts when the array is

 *	full, or when no more numbers can be retrieved from the

 *	string.

 *

		res = get_option ((char **)&str, ints + i);

		if (res == 0)

			break;

		if (res == 3) {

			int range_nums;

			range_nums = get_range((char **)&str, ints + i);

			if (range_nums < 0)

				break;

			/*

			 * Decrement the result by one to leave out the

			 * last number in the range.  The next iteration

			 * will handle the upper number in the range

			 */

			i += (range_nums - 1);

		}

		i++;

		if (res == 1)

			break;