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block: Generalized bio pool freeing

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With the old code, when you allocate a bio from a bio pool you have to
implement your own destructor that knows how to find the bio pool the
bio was originally allocated from.

This adds a new field to struct bio (bi_pool) and changes
bio_alloc_bioset() to use it. This makes various bio destructors
unnecessary, so they're then deleted.

v6: Explain the temporary if statement in bio_put

Signed-off-by: Kent Overstreet <[email protected]>
CC: Jens Axboe <[email protected]>
CC: NeilBrown <[email protected]>
CC: Alasdair Kergon <[email protected]>
CC: Nicholas Bellinger <[email protected]>
CC: Lars Ellenberg <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Acked-by: Nicholas Bellinger <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Kent Overstreet 2012-09-06 15:34:55 -07:00 • committed by Jens Axboe
commit 395c72a707
8 changed files with 21 additions and 103 deletions
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13
drivers/block/drbd/drbd_main.c
View file

@ -162,23 +162,12 @@ static const struct block_device_operations drbd_ops = {
.release = drbd_release,
};
static void bio_destructor_drbd(struct bio *bio)
{
bio_free(bio, drbd_md_io_bio_set);
}
struct bio *bio_alloc_drbd(gfp_t gfp_mask)
{
struct bio *bio;
if (!drbd_md_io_bio_set)
return bio_alloc(gfp_mask, 1);
bio = bio_alloc_bioset(gfp_mask, 1, drbd_md_io_bio_set);
if (!bio)
return NULL;
bio->bi_destructor = bio_destructor_drbd;
return bio;
return bio_alloc_bioset(gfp_mask, 1, drbd_md_io_bio_set);
}
#ifdef __CHECKER__