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authorKees Cook <keescook@chromium.org>2018-06-12 23:03:40 +0200
committerKees Cook <keescook@chromium.org>2018-06-13 01:19:22 +0200
commit6396bb221514d2876fd6dc0aa2a1f240d99b37bb (patch)
treec5c501e859b93de096b1f01160135612ed765059 /drivers/block
parenttreewide: kmalloc() -> kmalloc_array() (diff)
downloadlinux-6396bb221514d2876fd6dc0aa2a1f240d99b37bb.tar.xz
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/block')
-rw-r--r--drivers/block/drbd/drbd_main.c3
-rw-r--r--drivers/block/null_blk.c9
-rw-r--r--drivers/block/ps3vram.c5
-rw-r--r--drivers/block/rsxx/core.c3
-rw-r--r--drivers/block/rsxx/dma.c2
-rw-r--r--drivers/block/xen-blkback/xenbus.c3
-rw-r--r--drivers/block/xen-blkfront.c23
7 files changed, 29 insertions, 19 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 7655d6133139..a80809bd3057 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -511,7 +511,8 @@ static void drbd_calc_cpu_mask(cpumask_var_t *cpu_mask)
{
unsigned int *resources_per_cpu, min_index = ~0;
- resources_per_cpu = kzalloc(nr_cpu_ids * sizeof(*resources_per_cpu), GFP_KERNEL);
+ resources_per_cpu = kcalloc(nr_cpu_ids, sizeof(*resources_per_cpu),
+ GFP_KERNEL);
if (resources_per_cpu) {
struct drbd_resource *resource;
unsigned int cpu, min = ~0;
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index 2bdadd7f1454..7948049f6c43 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -1575,12 +1575,12 @@ static int setup_commands(struct nullb_queue *nq)
struct nullb_cmd *cmd;
int i, tag_size;
- nq->cmds = kzalloc(nq->queue_depth * sizeof(*cmd), GFP_KERNEL);
+ nq->cmds = kcalloc(nq->queue_depth, sizeof(*cmd), GFP_KERNEL);
if (!nq->cmds)
return -ENOMEM;
tag_size = ALIGN(nq->queue_depth, BITS_PER_LONG) / BITS_PER_LONG;
- nq->tag_map = kzalloc(tag_size * sizeof(unsigned long), GFP_KERNEL);
+ nq->tag_map = kcalloc(tag_size, sizeof(unsigned long), GFP_KERNEL);
if (!nq->tag_map) {
kfree(nq->cmds);
return -ENOMEM;
@@ -1598,8 +1598,9 @@ static int setup_commands(struct nullb_queue *nq)
static int setup_queues(struct nullb *nullb)
{
- nullb->queues = kzalloc(nullb->dev->submit_queues *
- sizeof(struct nullb_queue), GFP_KERNEL);
+ nullb->queues = kcalloc(nullb->dev->submit_queues,
+ sizeof(struct nullb_queue),
+ GFP_KERNEL);
if (!nullb->queues)
return -ENOMEM;
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index 8fa4533a1249..1e3d5de9d838 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -407,8 +407,9 @@ static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
priv->cache.page_count = CACHE_PAGE_COUNT;
priv->cache.page_size = CACHE_PAGE_SIZE;
- priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
- CACHE_PAGE_COUNT, GFP_KERNEL);
+ priv->cache.tags = kcalloc(CACHE_PAGE_COUNT,
+ sizeof(struct ps3vram_tag),
+ GFP_KERNEL);
if (!priv->cache.tags)
return -ENOMEM;
diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 09537bee387f..b7d71914a32a 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -873,7 +873,8 @@ static int rsxx_pci_probe(struct pci_dev *dev,
dev_info(CARD_TO_DEV(card),
"Failed reading the number of DMA targets\n");
- card->ctrl = kzalloc(card->n_targets * sizeof(*card->ctrl), GFP_KERNEL);
+ card->ctrl = kcalloc(card->n_targets, sizeof(*card->ctrl),
+ GFP_KERNEL);
if (!card->ctrl) {
st = -ENOMEM;
goto failed_dma_setup;
diff --git a/drivers/block/rsxx/dma.c b/drivers/block/rsxx/dma.c
index beaccf197a5a..8fbc1bf6db3d 100644
--- a/drivers/block/rsxx/dma.c
+++ b/drivers/block/rsxx/dma.c
@@ -1038,7 +1038,7 @@ int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card)
struct rsxx_dma *dma;
struct list_head *issued_dmas;
- issued_dmas = kzalloc(sizeof(*issued_dmas) * card->n_targets,
+ issued_dmas = kcalloc(card->n_targets, sizeof(*issued_dmas),
GFP_KERNEL);
if (!issued_dmas)
return -ENOMEM;
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 66412eededda..a4bc74e72c39 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -139,7 +139,8 @@ static int xen_blkif_alloc_rings(struct xen_blkif *blkif)
{
unsigned int r;
- blkif->rings = kzalloc(blkif->nr_rings * sizeof(struct xen_blkif_ring), GFP_KERNEL);
+ blkif->rings = kcalloc(blkif->nr_rings, sizeof(struct xen_blkif_ring),
+ GFP_KERNEL);
if (!blkif->rings)
return -ENOMEM;
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index ae00a82f350b..b5cedccb5d7d 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1906,7 +1906,9 @@ static int negotiate_mq(struct blkfront_info *info)
if (!info->nr_rings)
info->nr_rings = 1;
- info->rinfo = kzalloc(sizeof(struct blkfront_ring_info) * info->nr_rings, GFP_KERNEL);
+ info->rinfo = kcalloc(info->nr_rings,
+ sizeof(struct blkfront_ring_info),
+ GFP_KERNEL);
if (!info->rinfo) {
xenbus_dev_fatal(info->xbdev, -ENOMEM, "allocating ring_info structure");
return -ENOMEM;
@@ -2216,15 +2218,18 @@ static int blkfront_setup_indirect(struct blkfront_ring_info *rinfo)
}
for (i = 0; i < BLK_RING_SIZE(info); i++) {
- rinfo->shadow[i].grants_used = kzalloc(
- sizeof(rinfo->shadow[i].grants_used[0]) * grants,
- GFP_NOIO);
- rinfo->shadow[i].sg = kzalloc(sizeof(rinfo->shadow[i].sg[0]) * psegs, GFP_NOIO);
- if (info->max_indirect_segments)
- rinfo->shadow[i].indirect_grants = kzalloc(
- sizeof(rinfo->shadow[i].indirect_grants[0]) *
- INDIRECT_GREFS(grants),
+ rinfo->shadow[i].grants_used =
+ kcalloc(grants,
+ sizeof(rinfo->shadow[i].grants_used[0]),
GFP_NOIO);
+ rinfo->shadow[i].sg = kcalloc(psegs,
+ sizeof(rinfo->shadow[i].sg[0]),
+ GFP_NOIO);
+ if (info->max_indirect_segments)
+ rinfo->shadow[i].indirect_grants =
+ kcalloc(INDIRECT_GREFS(grants),
+ sizeof(rinfo->shadow[i].indirect_grants[0]),
+ GFP_NOIO);
if ((rinfo->shadow[i].grants_used == NULL) ||
(rinfo->shadow[i].sg == NULL) ||
(info->max_indirect_segments &&