Commit 94f6030c authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds

Slab allocators: Replace explicit zeroing with __GFP_ZERO

kmalloc_node() and kmem_cache_alloc_node() were not available in a zeroing
variant in the past.  But with __GFP_ZERO it is possible now to do zeroing
while allocating.

Use __GFP_ZERO to remove the explicit clearing of memory via memset whereever
we can.
Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 81cda662
......@@ -1322,10 +1322,9 @@ static void *as_init_queue(request_queue_t *q)
{
struct as_data *ad;
ad = kmalloc_node(sizeof(*ad), GFP_KERNEL, q->node);
ad = kmalloc_node(sizeof(*ad), GFP_KERNEL | __GFP_ZERO, q->node);
if (!ad)
return NULL;
memset(ad, 0, sizeof(*ad));
ad->q = q; /* Identify what queue the data belongs to */
......
......@@ -1251,9 +1251,9 @@ cfq_alloc_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
{
struct cfq_io_context *cic;
cic = kmem_cache_alloc_node(cfq_ioc_pool, gfp_mask, cfqd->queue->node);
cic = kmem_cache_alloc_node(cfq_ioc_pool, gfp_mask | __GFP_ZERO,
cfqd->queue->node);
if (cic) {
memset(cic, 0, sizeof(*cic));
cic->last_end_request = jiffies;
INIT_LIST_HEAD(&cic->queue_list);
cic->dtor = cfq_free_io_context;
......@@ -1376,17 +1376,19 @@ retry:
* free memory.
*/
spin_unlock_irq(cfqd->queue->queue_lock);
new_cfqq = kmem_cache_alloc_node(cfq_pool, gfp_mask|__GFP_NOFAIL, cfqd->queue->node);
new_cfqq = kmem_cache_alloc_node(cfq_pool,
gfp_mask | __GFP_NOFAIL | __GFP_ZERO,
cfqd->queue->node);
spin_lock_irq(cfqd->queue->queue_lock);
goto retry;
} else {
cfqq = kmem_cache_alloc_node(cfq_pool, gfp_mask, cfqd->queue->node);
cfqq = kmem_cache_alloc_node(cfq_pool,
gfp_mask | __GFP_ZERO,
cfqd->queue->node);
if (!cfqq)
goto out;
}
memset(cfqq, 0, sizeof(*cfqq));
RB_CLEAR_NODE(&cfqq->rb_node);
INIT_LIST_HEAD(&cfqq->fifo);
......@@ -2079,12 +2081,10 @@ static void *cfq_init_queue(request_queue_t *q)
{
struct cfq_data *cfqd;
cfqd = kmalloc_node(sizeof(*cfqd), GFP_KERNEL, q->node);
cfqd = kmalloc_node(sizeof(*cfqd), GFP_KERNEL | __GFP_ZERO, q->node);
if (!cfqd)
return NULL;
memset(cfqd, 0, sizeof(*cfqd));
cfqd->service_tree = CFQ_RB_ROOT;
INIT_LIST_HEAD(&cfqd->cic_list);
......
......@@ -360,10 +360,9 @@ static void *deadline_init_queue(request_queue_t *q)
{
struct deadline_data *dd;
dd = kmalloc_node(sizeof(*dd), GFP_KERNEL, q->node);
dd = kmalloc_node(sizeof(*dd), GFP_KERNEL | __GFP_ZERO, q->node);
if (!dd)
return NULL;
memset(dd, 0, sizeof(*dd));
INIT_LIST_HEAD(&dd->fifo_list[READ]);
INIT_LIST_HEAD(&dd->fifo_list[WRITE]);
......
......@@ -177,11 +177,10 @@ static elevator_t *elevator_alloc(request_queue_t *q, struct elevator_type *e)
elevator_t *eq;
int i;
eq = kmalloc_node(sizeof(elevator_t), GFP_KERNEL, q->node);
eq = kmalloc_node(sizeof(elevator_t), GFP_KERNEL | __GFP_ZERO, q->node);
if (unlikely(!eq))
goto err;
memset(eq, 0, sizeof(*eq));
eq->ops = &e->ops;
eq->elevator_type = e;
kobject_init(&eq->kobj);
......
......@@ -726,21 +726,21 @@ struct gendisk *alloc_disk_node(int minors, int node_id)
{
struct gendisk *disk;
disk = kmalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
disk = kmalloc_node(sizeof(struct gendisk),
GFP_KERNEL | __GFP_ZERO, node_id);
if (disk) {
memset(disk, 0, sizeof(struct gendisk));
if (!init_disk_stats(disk)) {
kfree(disk);
return NULL;
}
if (minors > 1) {
int size = (minors - 1) * sizeof(struct hd_struct *);
disk->part = kmalloc_node(size, GFP_KERNEL, node_id);
disk->part = kmalloc_node(size,
GFP_KERNEL | __GFP_ZERO, node_id);
if (!disk->part) {
kfree(disk);
return NULL;
}
memset(disk->part, 0, size);
}
disk->minors = minors;
kobj_set_kset_s(disk,block_subsys);
......
......@@ -1829,11 +1829,11 @@ request_queue_t *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
{
request_queue_t *q;
q = kmem_cache_alloc_node(requestq_cachep, gfp_mask, node_id);
q = kmem_cache_alloc_node(requestq_cachep,
gfp_mask | __GFP_ZERO, node_id);
if (!q)
return NULL;
memset(q, 0, sizeof(*q));
init_timer(&q->unplug_timer);
snprintf(q->kobj.name, KOBJ_NAME_LEN, "%s", "queue");
......
......@@ -1073,14 +1073,14 @@ static int init_irq (ide_hwif_t *hwif)
hwgroup->hwif->next = hwif;
spin_unlock_irq(&ide_lock);
} else {
hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL,
hwgroup = kmalloc_node(sizeof(ide_hwgroup_t),
GFP_KERNEL | __GFP_ZERO,
hwif_to_node(hwif->drives[0].hwif));
if (!hwgroup)
goto out_up;
hwif->hwgroup = hwgroup;
memset(hwgroup, 0, sizeof(ide_hwgroup_t));
hwgroup->hwif = hwif->next = hwif;
hwgroup->rq = NULL;
hwgroup->handler = NULL;
......
......@@ -1221,7 +1221,8 @@ static int __devinit init_timers_cpu(int cpu)
/*
* The APs use this path later in boot
*/
base = kmalloc_node(sizeof(*base), GFP_KERNEL,
base = kmalloc_node(sizeof(*base),
GFP_KERNEL | __GFP_ZERO,
cpu_to_node(cpu));
if (!base)
return -ENOMEM;
......@@ -1232,7 +1233,6 @@ static int __devinit init_timers_cpu(int cpu)
kfree(base);
return -ENOMEM;
}
memset(base, 0, sizeof(*base));
per_cpu(tvec_bases, cpu) = base;
} else {
/*
......
......@@ -54,11 +54,10 @@ int gen_pool_add(struct gen_pool *pool, unsigned long addr, size_t size,
int nbytes = sizeof(struct gen_pool_chunk) +
(nbits + BITS_PER_BYTE - 1) / BITS_PER_BYTE;
chunk = kmalloc_node(nbytes, GFP_KERNEL, nid);
chunk = kmalloc_node(nbytes, GFP_KERNEL | __GFP_ZERO, nid);
if (unlikely(chunk == NULL))
return -1;
memset(chunk, 0, nbytes);
spin_lock_init(&chunk->lock);
chunk->start_addr = addr;
chunk->end_addr = addr + size;
......
......@@ -53,12 +53,9 @@ void *percpu_populate(void *__pdata, size_t size, gfp_t gfp, int cpu)
int node = cpu_to_node(cpu);
BUG_ON(pdata->ptrs[cpu]);
if (node_online(node)) {
/* FIXME: kzalloc_node(size, gfp, node) */
pdata->ptrs[cpu] = kmalloc_node(size, gfp, node);
if (pdata->ptrs[cpu])
memset(pdata->ptrs[cpu], 0, size);
} else
if (node_online(node))
pdata->ptrs[cpu] = kmalloc_node(size, gfp|__GFP_ZERO, node);
else
pdata->ptrs[cpu] = kzalloc(size, gfp);
return pdata->ptrs[cpu];
}
......
......@@ -62,10 +62,9 @@ mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
mempool_free_t *free_fn, void *pool_data, int node_id)
{
mempool_t *pool;
pool = kmalloc_node(sizeof(*pool), GFP_KERNEL, node_id);
pool = kmalloc_node(sizeof(*pool), GFP_KERNEL | __GFP_ZERO, node_id);
if (!pool)
return NULL;
memset(pool, 0, sizeof(*pool));
pool->elements = kmalloc_node(min_nr * sizeof(void *),
GFP_KERNEL, node_id);
if (!pool->elements) {
......
......@@ -432,11 +432,12 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
area->nr_pages = nr_pages;
/* Please note that the recursion is strictly bounded. */
if (array_size > PAGE_SIZE) {
pages = __vmalloc_node(array_size, gfp_mask, PAGE_KERNEL, node);
pages = __vmalloc_node(array_size, gfp_mask | __GFP_ZERO,
PAGE_KERNEL, node);
area->flags |= VM_VPAGES;
} else {
pages = kmalloc_node(array_size,
(gfp_mask & GFP_LEVEL_MASK),
(gfp_mask & GFP_LEVEL_MASK) | __GFP_ZERO,
node);
}
area->pages = pages;
......@@ -445,7 +446,6 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
kfree(area);
return NULL;
}
memset(area->pages, 0, array_size);
for (i = 0; i < area->nr_pages; i++) {
if (node < 0)
......
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