void __iomem *reg_base, irq_flow_handler_t handler)
{
struct irq_chip_generic *gc;
- unsigned long sz = sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
- gc = kzalloc(sz, GFP_KERNEL);
+ gc = kzalloc(struct_size(gc, chip_types, num_ct), GFP_KERNEL);
if (gc) {
irq_init_generic_chip(gc, name, num_ct, irq_base, reg_base,
handler);
{
struct irq_domain_chip_generic *dgc;
struct irq_chip_generic *gc;
- int numchips, sz, i;
unsigned long flags;
+ int numchips, i;
+ size_t dgc_sz;
+ size_t gc_sz;
+ size_t sz;
void *tmp;
if (d->gc)
return -EINVAL;
/* Allocate a pointer, generic chip and chiptypes for each chip */
- sz = sizeof(*dgc) + numchips * sizeof(gc);
- sz += numchips * (sizeof(*gc) + num_ct * sizeof(struct irq_chip_type));
+ gc_sz = struct_size(gc, chip_types, num_ct);
+ dgc_sz = struct_size(dgc, gc, numchips);
+ sz = dgc_sz + numchips * gc_sz;
tmp = dgc = kzalloc(sz, GFP_KERNEL);
if (!dgc)
d->gc = dgc;
/* Calc pointer to the first generic chip */
- tmp += sizeof(*dgc) + numchips * sizeof(gc);
+ tmp += dgc_sz;
for (i = 0; i < numchips; i++) {
/* Store the pointer to the generic chip */
dgc->gc[i] = gc = tmp;
list_add_tail(&gc->list, &gc_list);
raw_spin_unlock_irqrestore(&gc_lock, flags);
/* Calc pointer to the next generic chip */
- tmp += sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
+ tmp += gc_sz;
}
return 0;
}