From d3f761104b097738932afcc310fbbbbfb007ef92 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 23 Dec 2008 12:46:21 +0100
Subject: [PATCH] bio: get rid of bio_vec clearing
We don't need to clear the memory used for adding bio_vec entries,
since nobody should be looking at members unitialized. Any valid
use should be below bio->bi_vcnt, and that members up until that count
must be valid since they were added through bio_add_page().
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
fs/bio.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/fs/bio.c b/fs/bio.c
index 75e6be18ecd..711cee10360 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -180,7 +180,7 @@ struct bio_vec *bvec_alloc_bs(gfp_t gfp_mask, int nr, unsigned long *idx,
* kzalloc() for the exact number of vecs right away.
*/
if (!bs)
- bvl = kzalloc(nr * sizeof(struct bio_vec), gfp_mask);
+ bvl = kmalloc(nr * sizeof(struct bio_vec), gfp_mask);
/*
* see comment near bvec_array define!
@@ -237,9 +237,6 @@ fallback:
}
}
- if (bvl)
- memset(bvl, 0, bvec_nr_vecs(*idx) * sizeof(struct bio_vec));
-
return bvl;
}
@@ -325,7 +322,6 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
idx = 0;
bvl = bio->bi_inline_vecs;
nr_iovecs = BIO_INLINE_VECS;
- memset(bvl, 0, BIO_INLINE_VECS * sizeof(*bvl));
} else {
bvl = bvec_alloc_bs(gfp_mask, nr_iovecs, &idx,
bs);
--
2.41.3