*/
#define BIO_INLINE_VECS 4
-static mempool_t *bio_split_pool __read_mostly;
-
/*
* if you change this list, also change bvec_alloc or things will
* break badly! cannot be bigger than what you can fit into an
{
memset(bio, 0, sizeof(*bio));
bio->bi_flags = 1 << BIO_UPTODATE;
+ atomic_set(&bio->bi_remaining, 1);
atomic_set(&bio->bi_cnt, 1);
}
EXPORT_SYMBOL(bio_init);
memset(bio, 0, BIO_RESET_BYTES);
bio->bi_flags = flags|(1 << BIO_UPTODATE);
+ atomic_set(&bio->bi_remaining, 1);
}
EXPORT_SYMBOL(bio_reset);
+static void bio_chain_endio(struct bio *bio, int error)
+{
+ bio_endio(bio->bi_private, error);
+ bio_put(bio);
+}
+
+/**
+ * bio_chain - chain bio completions
+ *
+ * The caller won't have a bi_end_io called when @bio completes - instead,
+ * @parent's bi_end_io won't be called until both @parent and @bio have
+ * completed; the chained bio will also be freed when it completes.
+ *
+ * The caller must not set bi_private or bi_end_io in @bio.
+ */
+void bio_chain(struct bio *bio, struct bio *parent)
+{
+ BUG_ON(bio->bi_private || bio->bi_end_io);
+
+ bio->bi_private = parent;
+ bio->bi_end_io = bio_chain_endio;
+ atomic_inc(&parent->bi_remaining);
+}
+EXPORT_SYMBOL(bio_chain);
+
static void bio_alloc_rescue(struct work_struct *work)
{
struct bio_set *bs = container_of(work, struct bio_set, rescue_work);
void zero_fill_bio(struct bio *bio)
{
unsigned long flags;
- struct bio_vec *bv;
- int i;
+ struct bio_vec bv;
+ struct bvec_iter iter;
- bio_for_each_segment(bv, bio, i) {
- char *data = bvec_kmap_irq(bv, &flags);
- memset(data, 0, bv->bv_len);
- flush_dcache_page(bv->bv_page);
+ bio_for_each_segment(bv, bio, iter) {
+ char *data = bvec_kmap_irq(&bv, &flags);
+ memset(data, 0, bv.bv_len);
+ flush_dcache_page(bv.bv_page);
bvec_kunmap_irq(data, &flags);
}
}
EXPORT_SYMBOL(bio_phys_segments);
/**
- * __bio_clone - clone a bio
+ * __bio_clone_fast - clone a bio that shares the original bio's biovec
* @bio: destination bio
* @bio_src: bio to clone
*
* Clone a &bio. Caller will own the returned bio, but not
* the actual data it points to. Reference count of returned
* bio will be one.
+ *
+ * Caller must ensure that @bio_src is not freed before @bio.
*/
-void __bio_clone(struct bio *bio, struct bio *bio_src)
+void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
{
- memcpy(bio->bi_io_vec, bio_src->bi_io_vec,
- bio_src->bi_max_vecs * sizeof(struct bio_vec));
+ BUG_ON(bio->bi_pool && BIO_POOL_IDX(bio) != BIO_POOL_NONE);
/*
* most users will be overriding ->bi_bdev with a new target,
* so we don't set nor calculate new physical/hw segment counts here
*/
- bio->bi_sector = bio_src->bi_sector;
bio->bi_bdev = bio_src->bi_bdev;
bio->bi_flags |= 1 << BIO_CLONED;
bio->bi_rw = bio_src->bi_rw;
- bio->bi_vcnt = bio_src->bi_vcnt;
- bio->bi_size = bio_src->bi_size;
- bio->bi_idx = bio_src->bi_idx;
+ bio->bi_iter = bio_src->bi_iter;
+ bio->bi_io_vec = bio_src->bi_io_vec;
}
-EXPORT_SYMBOL(__bio_clone);
+EXPORT_SYMBOL(__bio_clone_fast);
/**
- * bio_clone_bioset - clone a bio
+ * bio_clone_fast - clone a bio that shares the original bio's biovec
* @bio: bio to clone
* @gfp_mask: allocation priority
* @bs: bio_set to allocate from
*
- * Like __bio_clone, only also allocates the returned bio
+ * Like __bio_clone_fast, only also allocates the returned bio
*/
-struct bio *bio_clone_bioset(struct bio *bio, gfp_t gfp_mask,
- struct bio_set *bs)
+struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs)
{
struct bio *b;
- b = bio_alloc_bioset(gfp_mask, bio->bi_max_vecs, bs);
+ b = bio_alloc_bioset(gfp_mask, 0, bs);
if (!b)
return NULL;
- __bio_clone(b, bio);
+ __bio_clone_fast(b, bio);
if (bio_integrity(bio)) {
int ret;
return b;
}
+EXPORT_SYMBOL(bio_clone_fast);
+
+/**
+ * bio_clone_bioset - clone a bio
+ * @bio_src: bio to clone
+ * @gfp_mask: allocation priority
+ * @bs: bio_set to allocate from
+ *
+ * Clone bio. Caller will own the returned bio, but not the actual data it
+ * points to. Reference count of returned bio will be one.
+ */
+struct bio *bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
+ struct bio_set *bs)
+{
+ unsigned nr_iovecs = 0;
+ struct bvec_iter iter;
+ struct bio_vec bv;
+ struct bio *bio;
+
+ /*
+ * Pre immutable biovecs, __bio_clone() used to just do a memcpy from
+ * bio_src->bi_io_vec to bio->bi_io_vec.
+ *
+ * We can't do that anymore, because:
+ *
+ * - The point of cloning the biovec is to produce a bio with a biovec
+ * the caller can modify: bi_idx and bi_bvec_done should be 0.
+ *
+ * - The original bio could've had more than BIO_MAX_PAGES biovecs; if
+ * we tried to clone the whole thing bio_alloc_bioset() would fail.
+ * But the clone should succeed as long as the number of biovecs we
+ * actually need to allocate is fewer than BIO_MAX_PAGES.
+ *
+ * - Lastly, bi_vcnt should not be looked at or relied upon by code
+ * that does not own the bio - reason being drivers don't use it for
+ * iterating over the biovec anymore, so expecting it to be kept up
+ * to date (i.e. for clones that share the parent biovec) is just
+ * asking for trouble and would force extra work on
+ * __bio_clone_fast() anyways.
+ */
+
+ bio_for_each_segment(bv, bio_src, iter)
+ nr_iovecs++;
+
+ bio = bio_alloc_bioset(gfp_mask, nr_iovecs, bs);
+ if (!bio)
+ return NULL;
+
+ bio->bi_bdev = bio_src->bi_bdev;
+ bio->bi_rw = bio_src->bi_rw;
+ bio->bi_iter.bi_sector = bio_src->bi_iter.bi_sector;
+ bio->bi_iter.bi_size = bio_src->bi_iter.bi_size;
+
+ bio_for_each_segment(bv, bio_src, iter)
+ bio->bi_io_vec[bio->bi_vcnt++] = bv;
+
+ if (bio_integrity(bio_src)) {
+ int ret;
+
+ ret = bio_integrity_clone(bio, bio_src, gfp_mask);
+ if (ret < 0) {
+ bio_put(bio);
+ return NULL;
+ }
+ }
+
+ return bio;
+}
EXPORT_SYMBOL(bio_clone_bioset);
/**
if (unlikely(bio_flagged(bio, BIO_CLONED)))
return 0;
- if (((bio->bi_size + len) >> 9) > max_sectors)
+ if (((bio->bi_iter.bi_size + len) >> 9) > max_sectors)
return 0;
/*
simulate merging updated prev_bvec
as new bvec. */
.bi_bdev = bio->bi_bdev,
- .bi_sector = bio->bi_sector,
- .bi_size = bio->bi_size - prev_bv_len,
+ .bi_sector = bio->bi_iter.bi_sector,
+ .bi_size = bio->bi_iter.bi_size -
+ prev_bv_len,
.bi_rw = bio->bi_rw,
};
if (q->merge_bvec_fn) {
struct bvec_merge_data bvm = {
.bi_bdev = bio->bi_bdev,
- .bi_sector = bio->bi_sector,
- .bi_size = bio->bi_size,
+ .bi_sector = bio->bi_iter.bi_sector,
+ .bi_size = bio->bi_iter.bi_size,
.bi_rw = bio->bi_rw,
};
bio->bi_vcnt++;
bio->bi_phys_segments++;
done:
- bio->bi_size += len;
+ bio->bi_iter.bi_size += len;
return len;
}
if (bio_integrity(bio))
bio_integrity_advance(bio, bytes);
- bio->bi_sector += bytes >> 9;
- bio->bi_size -= bytes;
-
- if (bio->bi_rw & BIO_NO_ADVANCE_ITER_MASK)
- return;
-
- while (bytes) {
- if (unlikely(bio->bi_idx >= bio->bi_vcnt)) {
- WARN_ONCE(1, "bio idx %d >= vcnt %d\n",
- bio->bi_idx, bio->bi_vcnt);
- break;
- }
-
- if (bytes >= bio_iovec(bio)->bv_len) {
- bytes -= bio_iovec(bio)->bv_len;
- bio->bi_idx++;
- } else {
- bio_iovec(bio)->bv_len -= bytes;
- bio_iovec(bio)->bv_offset += bytes;
- bytes = 0;
- }
- }
+ bio_advance_iter(bio, &bio->bi_iter, bytes);
}
EXPORT_SYMBOL(bio_advance);
*/
void bio_copy_data(struct bio *dst, struct bio *src)
{
- struct bio_vec *src_bv, *dst_bv;
- unsigned src_offset, dst_offset, bytes;
+ struct bvec_iter src_iter, dst_iter;
+ struct bio_vec src_bv, dst_bv;
void *src_p, *dst_p;
+ unsigned bytes;
- src_bv = bio_iovec(src);
- dst_bv = bio_iovec(dst);
-
- src_offset = src_bv->bv_offset;
- dst_offset = dst_bv->bv_offset;
+ src_iter = src->bi_iter;
+ dst_iter = dst->bi_iter;
while (1) {
- if (src_offset == src_bv->bv_offset + src_bv->bv_len) {
- src_bv++;
- if (src_bv == bio_iovec_idx(src, src->bi_vcnt)) {
- src = src->bi_next;
- if (!src)
- break;
-
- src_bv = bio_iovec(src);
- }
+ if (!src_iter.bi_size) {
+ src = src->bi_next;
+ if (!src)
+ break;
- src_offset = src_bv->bv_offset;
+ src_iter = src->bi_iter;
}
- if (dst_offset == dst_bv->bv_offset + dst_bv->bv_len) {
- dst_bv++;
- if (dst_bv == bio_iovec_idx(dst, dst->bi_vcnt)) {
- dst = dst->bi_next;
- if (!dst)
- break;
-
- dst_bv = bio_iovec(dst);
- }
+ if (!dst_iter.bi_size) {
+ dst = dst->bi_next;
+ if (!dst)
+ break;
- dst_offset = dst_bv->bv_offset;
+ dst_iter = dst->bi_iter;
}
- bytes = min(dst_bv->bv_offset + dst_bv->bv_len - dst_offset,
- src_bv->bv_offset + src_bv->bv_len - src_offset);
+ src_bv = bio_iter_iovec(src, src_iter);
+ dst_bv = bio_iter_iovec(dst, dst_iter);
+
+ bytes = min(src_bv.bv_len, dst_bv.bv_len);
- src_p = kmap_atomic(src_bv->bv_page);
- dst_p = kmap_atomic(dst_bv->bv_page);
+ src_p = kmap_atomic(src_bv.bv_page);
+ dst_p = kmap_atomic(dst_bv.bv_page);
- memcpy(dst_p + dst_offset,
- src_p + src_offset,
+ memcpy(dst_p + dst_bv.bv_offset,
+ src_p + src_bv.bv_offset,
bytes);
kunmap_atomic(dst_p);
kunmap_atomic(src_p);
- src_offset += bytes;
- dst_offset += bytes;
+ bio_advance_iter(src, &src_iter, bytes);
+ bio_advance_iter(dst, &dst_iter, bytes);
}
}
EXPORT_SYMBOL(bio_copy_data);
struct bio_map_data {
- struct bio_vec *iovecs;
- struct sg_iovec *sgvecs;
int nr_sgvecs;
int is_our_pages;
+ struct sg_iovec sgvecs[];
};
static void bio_set_map_data(struct bio_map_data *bmd, struct bio *bio,
struct sg_iovec *iov, int iov_count,
int is_our_pages)
{
- memcpy(bmd->iovecs, bio->bi_io_vec, sizeof(struct bio_vec) * bio->bi_vcnt);
memcpy(bmd->sgvecs, iov, sizeof(struct sg_iovec) * iov_count);
bmd->nr_sgvecs = iov_count;
bmd->is_our_pages = is_our_pages;
bio->bi_private = bmd;
}
-static void bio_free_map_data(struct bio_map_data *bmd)
-{
- kfree(bmd->iovecs);
- kfree(bmd->sgvecs);
- kfree(bmd);
-}
-
static struct bio_map_data *bio_alloc_map_data(int nr_segs,
unsigned int iov_count,
gfp_t gfp_mask)
{
- struct bio_map_data *bmd;
-
if (iov_count > UIO_MAXIOV)
return NULL;
- bmd = kmalloc(sizeof(*bmd), gfp_mask);
- if (!bmd)
- return NULL;
-
- bmd->iovecs = kmalloc(sizeof(struct bio_vec) * nr_segs, gfp_mask);
- if (!bmd->iovecs) {
- kfree(bmd);
- return NULL;
- }
-
- bmd->sgvecs = kmalloc(sizeof(struct sg_iovec) * iov_count, gfp_mask);
- if (bmd->sgvecs)
- return bmd;
-
- kfree(bmd->iovecs);
- kfree(bmd);
- return NULL;
+ return kmalloc(sizeof(struct bio_map_data) +
+ sizeof(struct sg_iovec) * iov_count, gfp_mask);
}
-static int __bio_copy_iov(struct bio *bio, struct bio_vec *iovecs,
- struct sg_iovec *iov, int iov_count,
+static int __bio_copy_iov(struct bio *bio, struct sg_iovec *iov, int iov_count,
int to_user, int from_user, int do_free_page)
{
int ret = 0, i;
bio_for_each_segment_all(bvec, bio, i) {
char *bv_addr = page_address(bvec->bv_page);
- unsigned int bv_len = iovecs[i].bv_len;
+ unsigned int bv_len = bvec->bv_len;
while (bv_len && iov_idx < iov_count) {
unsigned int bytes;
* don't copy into a random user address space, just free.
*/
if (current->mm)
- ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs,
- bmd->nr_sgvecs, bio_data_dir(bio) == READ,
+ ret = __bio_copy_iov(bio, bmd->sgvecs, bmd->nr_sgvecs,
+ bio_data_dir(bio) == READ,
0, bmd->is_our_pages);
else if (bmd->is_our_pages)
bio_for_each_segment_all(bvec, bio, i)
__free_page(bvec->bv_page);
}
- bio_free_map_data(bmd);
+ kfree(bmd);
bio_put(bio);
return ret;
}
*/
if ((!write_to_vm && (!map_data || !map_data->null_mapped)) ||
(map_data && map_data->from_user)) {
- ret = __bio_copy_iov(bio, bio->bi_io_vec, iov, iov_count, 0, 1, 0);
+ ret = __bio_copy_iov(bio, iov, iov_count, 0, 1, 0);
if (ret)
goto cleanup;
}
bio_put(bio);
out_bmd:
- bio_free_map_data(bmd);
+ kfree(bmd);
return ERR_PTR(ret);
}
if (IS_ERR(bio))
return bio;
- if (bio->bi_size == len)
+ if (bio->bi_iter.bi_size == len)
return bio;
/*
bio_for_each_segment_all(bvec, bio, i) {
char *addr = page_address(bvec->bv_page);
- int len = bmd->iovecs[i].bv_len;
if (read)
- memcpy(p, addr, len);
+ memcpy(p, addr, bvec->bv_len);
__free_page(bvec->bv_page);
- p += len;
+ p += bvec->bv_len;
}
- bio_free_map_data(bmd);
+ kfree(bmd);
bio_put(bio);
}
#if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
void bio_flush_dcache_pages(struct bio *bi)
{
- int i;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
- bio_for_each_segment(bvec, bi, i)
- flush_dcache_page(bvec->bv_page);
+ bio_for_each_segment(bvec, bi, iter)
+ flush_dcache_page(bvec.bv_page);
}
EXPORT_SYMBOL(bio_flush_dcache_pages);
#endif
**/
void bio_endio(struct bio *bio, int error)
{
- if (error)
- clear_bit(BIO_UPTODATE, &bio->bi_flags);
- else if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
- error = -EIO;
+ while (bio) {
+ BUG_ON(atomic_read(&bio->bi_remaining) <= 0);
- if (bio->bi_end_io)
- bio->bi_end_io(bio, error);
-}
-EXPORT_SYMBOL(bio_endio);
+ if (error)
+ clear_bit(BIO_UPTODATE, &bio->bi_flags);
+ else if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
+ error = -EIO;
-void bio_pair_release(struct bio_pair *bp)
-{
- if (atomic_dec_and_test(&bp->cnt)) {
- struct bio *master = bp->bio1.bi_private;
+ if (!atomic_dec_and_test(&bio->bi_remaining))
+ return;
- bio_endio(master, bp->error);
- mempool_free(bp, bp->bio2.bi_private);
+ /*
+ * Need to have a real endio function for chained bios,
+ * otherwise various corner cases will break (like stacking
+ * block devices that save/restore bi_end_io) - however, we want
+ * to avoid unbounded recursion and blowing the stack. Tail call
+ * optimization would handle this, but compiling with frame
+ * pointers also disables gcc's sibling call optimization.
+ */
+ if (bio->bi_end_io == bio_chain_endio) {
+ struct bio *parent = bio->bi_private;
+ bio_put(bio);
+ bio = parent;
+ } else {
+ if (bio->bi_end_io)
+ bio->bi_end_io(bio, error);
+ bio = NULL;
+ }
}
}
-EXPORT_SYMBOL(bio_pair_release);
+EXPORT_SYMBOL(bio_endio);
-static void bio_pair_end_1(struct bio *bi, int err)
+/**
+ * bio_endio_nodec - end I/O on a bio, without decrementing bi_remaining
+ * @bio: bio
+ * @error: error, if any
+ *
+ * For code that has saved and restored bi_end_io; thing hard before using this
+ * function, probably you should've cloned the entire bio.
+ **/
+void bio_endio_nodec(struct bio *bio, int error)
{
- struct bio_pair *bp = container_of(bi, struct bio_pair, bio1);
-
- if (err)
- bp->error = err;
-
- bio_pair_release(bp);
+ atomic_inc(&bio->bi_remaining);
+ bio_endio(bio, error);
}
+EXPORT_SYMBOL(bio_endio_nodec);
-static void bio_pair_end_2(struct bio *bi, int err)
-{
- struct bio_pair *bp = container_of(bi, struct bio_pair, bio2);
-
- if (err)
- bp->error = err;
-
- bio_pair_release(bp);
-}
-
-/*
- * split a bio - only worry about a bio with a single page in its iovec
+/**
+ * bio_split - split a bio
+ * @bio: bio to split
+ * @sectors: number of sectors to split from the front of @bio
+ * @gfp: gfp mask
+ * @bs: bio set to allocate from
+ *
+ * Allocates and returns a new bio which represents @sectors from the start of
+ * @bio, and updates @bio to represent the remaining sectors.
+ *
+ * The newly allocated bio will point to @bio's bi_io_vec; it is the caller's
+ * responsibility to ensure that @bio is not freed before the split.
*/
-struct bio_pair *bio_split(struct bio *bi, int first_sectors)
+struct bio *bio_split(struct bio *bio, int sectors,
+ gfp_t gfp, struct bio_set *bs)
{
- struct bio_pair *bp = mempool_alloc(bio_split_pool, GFP_NOIO);
-
- if (!bp)
- return bp;
-
- trace_block_split(bdev_get_queue(bi->bi_bdev), bi,
- bi->bi_sector + first_sectors);
-
- BUG_ON(bio_segments(bi) > 1);
- atomic_set(&bp->cnt, 3);
- bp->error = 0;
- bp->bio1 = *bi;
- bp->bio2 = *bi;
- bp->bio2.bi_sector += first_sectors;
- bp->bio2.bi_size -= first_sectors << 9;
- bp->bio1.bi_size = first_sectors << 9;
-
- if (bi->bi_vcnt != 0) {
- bp->bv1 = *bio_iovec(bi);
- bp->bv2 = *bio_iovec(bi);
-
- if (bio_is_rw(bi)) {
- bp->bv2.bv_offset += first_sectors << 9;
- bp->bv2.bv_len -= first_sectors << 9;
- bp->bv1.bv_len = first_sectors << 9;
- }
+ struct bio *split = NULL;
- bp->bio1.bi_io_vec = &bp->bv1;
- bp->bio2.bi_io_vec = &bp->bv2;
+ BUG_ON(sectors <= 0);
+ BUG_ON(sectors >= bio_sectors(bio));
- bp->bio1.bi_max_vecs = 1;
- bp->bio2.bi_max_vecs = 1;
- }
+ split = bio_clone_fast(bio, gfp, bs);
+ if (!split)
+ return NULL;
- bp->bio1.bi_end_io = bio_pair_end_1;
- bp->bio2.bi_end_io = bio_pair_end_2;
+ split->bi_iter.bi_size = sectors << 9;
- bp->bio1.bi_private = bi;
- bp->bio2.bi_private = bio_split_pool;
+ if (bio_integrity(split))
+ bio_integrity_trim(split, 0, sectors);
- if (bio_integrity(bi))
- bio_integrity_split(bi, bp, first_sectors);
+ bio_advance(bio, split->bi_iter.bi_size);
- return bp;
+ return split;
}
EXPORT_SYMBOL(bio_split);
{
/* 'bio' is a cloned bio which we need to trim to match
* the given offset and size.
- * This requires adjusting bi_sector, bi_size, and bi_io_vec
*/
- int i;
- struct bio_vec *bvec;
- int sofar = 0;
size <<= 9;
- if (offset == 0 && size == bio->bi_size)
+ if (offset == 0 && size == bio->bi_iter.bi_size)
return;
clear_bit(BIO_SEG_VALID, &bio->bi_flags);
bio_advance(bio, offset << 9);
- bio->bi_size = size;
-
- /* avoid any complications with bi_idx being non-zero*/
- if (bio->bi_idx) {
- memmove(bio->bi_io_vec, bio->bi_io_vec+bio->bi_idx,
- (bio->bi_vcnt - bio->bi_idx) * sizeof(struct bio_vec));
- bio->bi_vcnt -= bio->bi_idx;
- bio->bi_idx = 0;
- }
- /* Make sure vcnt and last bv are not too big */
- bio_for_each_segment(bvec, bio, i) {
- if (sofar + bvec->bv_len > size)
- bvec->bv_len = size - sofar;
- if (bvec->bv_len == 0) {
- bio->bi_vcnt = i;
- break;
- }
- sofar += bvec->bv_len;
- }
+ bio->bi_iter.bi_size = size;
}
EXPORT_SYMBOL_GPL(bio_trim);
-/**
- * bio_sector_offset - Find hardware sector offset in bio
- * @bio: bio to inspect
- * @index: bio_vec index
- * @offset: offset in bv_page
- *
- * Return the number of hardware sectors between beginning of bio
- * and an end point indicated by a bio_vec index and an offset
- * within that vector's page.
- */
-sector_t bio_sector_offset(struct bio *bio, unsigned short index,
- unsigned int offset)
-{
- unsigned int sector_sz;
- struct bio_vec *bv;
- sector_t sectors;
- int i;
-
- sector_sz = queue_logical_block_size(bio->bi_bdev->bd_disk->queue);
- sectors = 0;
-
- if (index >= bio->bi_idx)
- index = bio->bi_vcnt - 1;
-
- bio_for_each_segment_all(bv, bio, i) {
- if (i == index) {
- if (offset > bv->bv_offset)
- sectors += (offset - bv->bv_offset) / sector_sz;
- break;
- }
-
- sectors += bv->bv_len / sector_sz;
- }
-
- return sectors;
-}
-EXPORT_SYMBOL(bio_sector_offset);
-
/*
* create memory pools for biovec's in a bio_set.
* use the global biovec slabs created for general use.
if (bioset_integrity_create(fs_bio_set, BIO_POOL_SIZE))
panic("bio: can't create integrity pool\n");
- bio_split_pool = mempool_create_kmalloc_pool(BIO_SPLIT_ENTRIES,
- sizeof(struct bio_pair));
- if (!bio_split_pool)
- panic("bio: can't create split pool\n");
-
return 0;
}
subsys_initcall(init_bio);
projects / cascardo / linux.git / blobdiff