Re: [patch 3/4] cpu alloc: The allocator

[Christoph Lameter <cl@linux-foundation.org>]

Eric Dumazet wrote:

>> +    unsigned long start;
>> +    int units = size_to_units(size);
>> +    void *ptr;
>> +    int first;
>> +    unsigned long flags;
>> +
>> +    if (!size)
>> +        return ZERO_SIZE_PTR;
>> +
>> +    WARN_ON(align > PAGE_SIZE);
> 
> if (align < UNIT_SIZE)
>     align = UNIT_SIZE;

size_to_units() does round up:


/*
 * How many units are needed for an object of a given size
 */
static int size_to_units(unsigned long size)
{
        return DIV_ROUND_UP(size, UNIT_SIZE);
}