/* Allocate a `struct vperfctr'. Claim and reserve
an entire page so that it can be mmap():ed. */
static struct vperfctr *vperfctr_alloc(void)
{
unsigned long page;
if (inc_nrctrs() != 0)
return ERR_PTR(-EBUSY);
page = get_zeroed_page(GFP_KERNEL);
if (!page) {
dec_nrctrs();
return ERR_PTR(-ENOMEM);
}
SetPageReserved(virt_to_page((void *)(page)));
return (struct vperfctr*) page;
}
/* Allocate a `struct vperfctr'. Claim and reserve
an entire page so that it can be mmap():ed. */
static struct vperfctr *vperfctr_alloc(void)
{
struct vperfctr *perf;
if (inc_nrctrs() != 0)
return ERR_PTR(-EBUSY);
perf = (struct vperfctr *) kmem_alloc (sizeof (struct vperfctr));
if (!perf) {
dec_nrctrs();
return ERR_PTR(-ENOMEM);
}
return perf;
}
