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md/raid5: convert to macros into inline functions. 

More type-safety.  Easier to read.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2011-10-07 14:23:00 +11:00
parent 0fc280f606
commit db298e1946
1 changed files with 14 additions and 3 deletions
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17
drivers/md/raid5.c
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@ -70,7 +70,11 @@
#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
@ -78,10 +82,17 @@
* 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
*/