diff options
author | Kees Cook <keescook@chromium.org> | 2018-06-12 14:03:40 -0700 |
---|---|---|
committer | Kees Cook <keescook@chromium.org> | 2018-06-12 16:19:22 -0700 |
commit | 6396bb221514d2876fd6dc0aa2a1f240d99b37bb (patch) | |
tree | c5c501e859b93de096b1f01160135612ed765059 /drivers/md | |
parent | 6da2ec56059c3c7a7e5f729e6349e74ace1e5c57 (diff) | |
download | linux-6396bb221514d2876fd6dc0aa2a1f240d99b37bb.tar.gz linux-6396bb221514d2876fd6dc0aa2a1f240d99b37bb.tar.bz2 linux-6396bb221514d2876fd6dc0aa2a1f240d99b37bb.zip |
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/md')
-rw-r--r-- | drivers/md/bcache/super.c | 7 | ||||
-rw-r--r-- | drivers/md/dm-crypt.c | 5 | ||||
-rw-r--r-- | drivers/md/md-bitmap.c | 2 | ||||
-rw-r--r-- | drivers/md/md-cluster.c | 6 | ||||
-rw-r--r-- | drivers/md/md-multipath.c | 3 | ||||
-rw-r--r-- | drivers/md/raid0.c | 10 | ||||
-rw-r--r-- | drivers/md/raid1.c | 9 | ||||
-rw-r--r-- | drivers/md/raid10.c | 13 | ||||
-rw-r--r-- | drivers/md/raid5.c | 15 |
9 files changed, 38 insertions, 32 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index a31e55bcc4e5..ec5f70d021de 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1715,7 +1715,7 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *sb) iter_size = (sb->bucket_size / sb->block_size + 1) * sizeof(struct btree_iter_set); - if (!(c->devices = kzalloc(c->nr_uuids * sizeof(void *), GFP_KERNEL)) || + if (!(c->devices = kcalloc(c->nr_uuids, sizeof(void *), GFP_KERNEL)) || mempool_init_slab_pool(&c->search, 32, bch_search_cache) || mempool_init_kmalloc_pool(&c->bio_meta, 2, sizeof(struct bbio) + sizeof(struct bio_vec) * @@ -2043,8 +2043,9 @@ static int cache_alloc(struct cache *ca) !init_heap(&ca->heap, free << 3, GFP_KERNEL) || !(ca->buckets = vzalloc(sizeof(struct bucket) * ca->sb.nbuckets)) || - !(ca->prio_buckets = kzalloc(sizeof(uint64_t) * prio_buckets(ca) * - 2, GFP_KERNEL)) || + !(ca->prio_buckets = kzalloc(array3_size(sizeof(uint64_t), + prio_buckets(ca), 2), + GFP_KERNEL)) || !(ca->disk_buckets = alloc_bucket_pages(GFP_KERNEL, ca))) return -ENOMEM; diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index da02f4d8e4b9..57ca92dc0c3e 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1878,8 +1878,9 @@ static int crypt_alloc_tfms_skcipher(struct crypt_config *cc, char *ciphermode) unsigned i; int err; - cc->cipher_tfm.tfms = kzalloc(cc->tfms_count * - sizeof(struct crypto_skcipher *), GFP_KERNEL); + cc->cipher_tfm.tfms = kcalloc(cc->tfms_count, + sizeof(struct crypto_skcipher *), + GFP_KERNEL); if (!cc->cipher_tfm.tfms) return -ENOMEM; diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index 01c8329b512d..f983c3fdf204 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -2117,7 +2117,7 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks, pages = DIV_ROUND_UP(chunks, PAGE_COUNTER_RATIO); - new_bp = kzalloc(pages * sizeof(*new_bp), GFP_KERNEL); + new_bp = kcalloc(pages, sizeof(*new_bp), GFP_KERNEL); ret = -ENOMEM; if (!new_bp) { bitmap_file_unmap(&store); diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c index 79bfbc840385..021cbf9ef1bf 100644 --- a/drivers/md/md-cluster.c +++ b/drivers/md/md-cluster.c @@ -1380,9 +1380,9 @@ static int lock_all_bitmaps(struct mddev *mddev) char str[64]; struct md_cluster_info *cinfo = mddev->cluster_info; - cinfo->other_bitmap_lockres = kzalloc((mddev->bitmap_info.nodes - 1) * - sizeof(struct dlm_lock_resource *), - GFP_KERNEL); + cinfo->other_bitmap_lockres = + kcalloc(mddev->bitmap_info.nodes - 1, + sizeof(struct dlm_lock_resource *), GFP_KERNEL); if (!cinfo->other_bitmap_lockres) { pr_err("md: can't alloc mem for other bitmap locks\n"); return 0; diff --git a/drivers/md/md-multipath.c b/drivers/md/md-multipath.c index f71fcdb9b39c..881487de1e25 100644 --- a/drivers/md/md-multipath.c +++ b/drivers/md/md-multipath.c @@ -399,7 +399,8 @@ static int multipath_run (struct mddev *mddev) if (!conf) goto out; - conf->multipaths = kzalloc(sizeof(struct multipath_info)*mddev->raid_disks, + conf->multipaths = kcalloc(mddev->raid_disks, + sizeof(struct multipath_info), GFP_KERNEL); if (!conf->multipaths) goto out_free_conf; diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 65ae47a02218..ac1cffd2a09b 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -159,12 +159,14 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf) } err = -ENOMEM; - conf->strip_zone = kzalloc(sizeof(struct strip_zone)* - conf->nr_strip_zones, GFP_KERNEL); + conf->strip_zone = kcalloc(conf->nr_strip_zones, + sizeof(struct strip_zone), + GFP_KERNEL); if (!conf->strip_zone) goto abort; - conf->devlist = kzalloc(sizeof(struct md_rdev*)* - conf->nr_strip_zones*mddev->raid_disks, + conf->devlist = kzalloc(array3_size(sizeof(struct md_rdev *), + conf->nr_strip_zones, + mddev->raid_disks), GFP_KERNEL); if (!conf->devlist) goto abort; diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index e7c0ecd19234..8e05c1092aef 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -2936,9 +2936,9 @@ static struct r1conf *setup_conf(struct mddev *mddev) if (!conf->barrier) goto abort; - conf->mirrors = kzalloc(sizeof(struct raid1_info) - * mddev->raid_disks * 2, - GFP_KERNEL); + conf->mirrors = kzalloc(array3_size(sizeof(struct raid1_info), + mddev->raid_disks, 2), + GFP_KERNEL); if (!conf->mirrors) goto abort; @@ -3241,7 +3241,8 @@ static int raid1_reshape(struct mddev *mddev) kfree(newpoolinfo); return ret; } - newmirrors = kzalloc(sizeof(struct raid1_info) * raid_disks * 2, + newmirrors = kzalloc(array3_size(sizeof(struct raid1_info), + raid_disks, 2), GFP_KERNEL); if (!newmirrors) { kfree(newpoolinfo); diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index e35db73b9b9e..478cf446827f 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -3688,8 +3688,8 @@ static struct r10conf *setup_conf(struct mddev *mddev) goto out; /* FIXME calc properly */ - conf->mirrors = kzalloc(sizeof(struct raid10_info)*(mddev->raid_disks + - max(0,-mddev->delta_disks)), + conf->mirrors = kcalloc(mddev->raid_disks + max(0, -mddev->delta_disks), + sizeof(struct raid10_info), GFP_KERNEL); if (!conf->mirrors) goto out; @@ -4129,11 +4129,10 @@ static int raid10_check_reshape(struct mddev *mddev) conf->mirrors_new = NULL; if (mddev->delta_disks > 0) { /* allocate new 'mirrors' list */ - conf->mirrors_new = kzalloc( - sizeof(struct raid10_info) - *(mddev->raid_disks + - mddev->delta_disks), - GFP_KERNEL); + conf->mirrors_new = + kcalloc(mddev->raid_disks + mddev->delta_disks, + sizeof(struct raid10_info), + GFP_KERNEL); if (!conf->mirrors_new) return -ENOMEM; } diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 73489446bbcb..2031506a0ecd 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -2396,7 +2396,7 @@ static int resize_stripes(struct r5conf *conf, int newsize) * is completely stalled, so now is a good time to resize * conf->disks and the scribble region */ - ndisks = kzalloc(newsize * sizeof(struct disk_info), GFP_NOIO); + ndisks = kcalloc(newsize, sizeof(struct disk_info), GFP_NOIO); if (ndisks) { for (i = 0; i < conf->pool_size; i++) ndisks[i] = conf->disks[i]; @@ -6664,9 +6664,9 @@ static int alloc_thread_groups(struct r5conf *conf, int cnt, } *group_cnt = num_possible_nodes(); size = sizeof(struct r5worker) * cnt; - workers = kzalloc(size * *group_cnt, GFP_NOIO); - *worker_groups = kzalloc(sizeof(struct r5worker_group) * - *group_cnt, GFP_NOIO); + workers = kcalloc(size, *group_cnt, GFP_NOIO); + *worker_groups = kcalloc(*group_cnt, sizeof(struct r5worker_group), + GFP_NOIO); if (!*worker_groups || !workers) { kfree(workers); kfree(*worker_groups); @@ -6894,8 +6894,9 @@ static struct r5conf *setup_conf(struct mddev *mddev) goto abort; INIT_LIST_HEAD(&conf->free_list); INIT_LIST_HEAD(&conf->pending_list); - conf->pending_data = kzalloc(sizeof(struct r5pending_data) * - PENDING_IO_MAX, GFP_KERNEL); + conf->pending_data = kcalloc(PENDING_IO_MAX, + sizeof(struct r5pending_data), + GFP_KERNEL); if (!conf->pending_data) goto abort; for (i = 0; i < PENDING_IO_MAX; i++) @@ -6944,7 +6945,7 @@ static struct r5conf *setup_conf(struct mddev *mddev) conf->previous_raid_disks = mddev->raid_disks - mddev->delta_disks; max_disks = max(conf->raid_disks, conf->previous_raid_disks); - conf->disks = kzalloc(max_disks * sizeof(struct disk_info), + conf->disks = kcalloc(max_disks, sizeof(struct disk_info), GFP_KERNEL); if (!conf->disks) |