bio: move the slab pointer inside the bio_set

In preparation for adding differently sized bios.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/fs/bio.c b/fs/bio.c
index eb6b468..1ab8986 100644 (file)
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -1404,12 +1404,15 @@ void bioset_free(struct bio_set *bs)
 
 struct bio_set *bioset_create(int bio_pool_size, int bvec_pool_size)
 {
-       struct bio_set *bs = kzalloc(sizeof(*bs), GFP_KERNEL);
+       struct bio_set *bs;
 
+       bs = kzalloc(sizeof(*bs), GFP_KERNEL);
        if (!bs)
                return NULL;
 
-       bs->bio_pool = mempool_create_slab_pool(bio_pool_size, bio_slab);
+       bs->bio_slab = bio_slab;
+
+       bs->bio_pool = mempool_create_slab_pool(bio_pool_size, bs->bio_slab);
        if (!bs->bio_pool)
                goto bad;
 

diff --git a/include/linux/bio.h b/include/linux/bio.h
index d76e4bf..9340098 100644 (file)
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -400,6 +400,7 @@ static inline void bio_set_completion_cpu(struct bio *bio, unsigned int cpu)
 #define BIOVEC_MAX_IDX (BIOVEC_NR_POOLS - 1)
 
 struct bio_set {
+       struct kmem_cache *bio_slab;
        mempool_t *bio_pool;
 #if defined(CONFIG_BLK_DEV_INTEGRITY)
        mempool_t *bio_integrity_pool;