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bcache: Use standard utility code

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Some of bcache's utility code has made it into the rest of the kernel,
so drop the bcache versions.

Bcache used to have a workaround for allocating from a bio set under
generic_make_request() (if you allocated more than once, the bios you
already allocated would get stuck on current->bio_list when you
submitted, and you'd risk deadlock) - bcache would mask out __GFP_WAIT
when allocating bios under generic_make_request() so that allocation
could fail and it could retry from workqueue. But bio_alloc_bioset() has
a workaround now, so we can drop this hack and the associated error
handling.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
This commit is contained in:
Kent Overstreet
2013-06-06 18:15:57 -07:00
committed by Kent Overstreet
parent 47cd2eb0ee
commit 8e51e414a3
8 changed files with 51 additions and 144 deletions
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17
drivers/md/bcache/util.c
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@@ -228,23 +228,6 @@ start: bv->bv_len = min_t(size_t, PAGE_SIZE - bv->bv_offset,
}
}
int bch_bio_alloc_pages(struct bio *bio, gfp_t gfp)
{
int i;
struct bio_vec *bv;
bio_for_each_segment(bv, bio, i) {
bv->bv_page = alloc_page(gfp);
if (!bv->bv_page) {
while (bv-- != bio->bi_io_vec + bio->bi_idx)
__free_page(bv->bv_page);
return -ENOMEM;
}
}
return 0;
}
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