md/raid5: convert to macros into inline functions.

#define NR_HASH			(PAGE_SIZE / sizeof(struct hlist_head))

#define HASH_MASK		(NR_HASH - 1)

#define stripe_hash(conf, sect)	(&((conf)->stripe_hashtbl[((sect) >> STRIPE_SHIFT) & HASH_MASK]))

static inline struct hlist_head *stripe_hash(raid5_conf_t *conf, sector_t sect)

{

	int hash = (sect >> STRIPE_SHIFT) & HASH_MASK;

	return &conf->stripe_hashtbl[hash];

}

/* bio's attached to a stripe+device for I/O are linked together in bi_sector

 * order without overlap.  There may be several bio's per stripe+device, and

 * When walking this list for a particular stripe+device, we must never proceed

 * beyond a bio that extends past this device, as the next bio might no longer

 * be valid.

 * This macro is used to determine the 'next' bio in the list, given the sector

 * This function is used to determine the 'next' bio in the list, given the sector

 * of the current stripe+device

 */

#define r5_next_bio(bio, sect) ( ( (bio)->bi_sector + ((bio)->bi_size>>9) < sect + STRIPE_SECTORS) ? (bio)->bi_next : NULL)

static inline struct bio *r5_next_bio(struct bio *bio, sector_t sector)

{

	int sectors = bio->bi_size >> 9;

	if (bio->bi_sector + sectors < sector + STRIPE_SECTORS)

		return bio->bi_next;

	else

		return NULL;

}

/*

 * The following can be used to debug the driver

 */