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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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7
drivers/md/bcache/writeback.c
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@@ -285,9 +285,10 @@ static void write_dirty_finish(struct closure *cl)
struct dirty_io *io = container_of(cl, struct dirty_io, cl);
struct keybuf_key *w = io->bio.bi_private;
struct cached_dev *dc = io->dc;
struct bio_vec *bv = bio_iovec_idx(&io->bio, io->bio.bi_vcnt);
struct bio_vec *bv;
int i;
while (bv-- != io->bio.bi_io_vec)
bio_for_each_segment_all(bv, &io->bio, i)
__free_page(bv->bv_page);
/* This is kind of a dumb way of signalling errors. */
@@ -418,7 +419,7 @@ static void read_dirty(struct closure *cl)
io->bio.bi_rw = READ;
io->bio.bi_end_io = read_dirty_endio;
if (bch_bio_alloc_pages(&io->bio, GFP_KERNEL))
if (bio_alloc_pages(&io->bio, GFP_KERNEL))
goto err_free;
trace_bcache_writeback(&w->key);