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Subject[PATCH next] bio: zero inlined bio_vec
bvec_alloc_bs() zeroes its bio_vec, and at least __blk_queue_bounce()
relies upon that: therefore bio_alloc_bioset() must zero the inlined
bio_vec - without that, lots of nastiness occurs in bounce_end_io and
blk_rq_map_sg and other places when booting up my PAE box.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
---

fs/bio.c | 2 ++
1 file changed, 2 insertions(+)

--- linux-next/fs/bio.c 2008-12-21 20:49:25.000000000 +0000
+++ fixed/fs/bio.c 2008-12-22 21:10:06.000000000 +0000
@@ -324,6 +324,8 @@ struct bio *bio_alloc_bioset(gfp_t gfp_m
if (nr_iovecs <= BIO_INLINE_VECS) {
idx = 0;
bvl = bio->bi_inline_vecs;
+ memset(bvl, 0, BIO_INLINE_VECS *
+ sizeof(struct bio_vec));
nr_iovecs = BIO_INLINE_VECS;
} else {
bvl = bvec_alloc_bs(gfp_mask, nr_iovecs, &idx,

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