On Wed, Sep 9, 2009 at 5:13 PM, Leonidas .<leonidas137@xxxxxxxxx> wrote:
> Why there is no realloc in kernel?
> Any specific reason?
>
> Regards,
> Sandeep.
>
May be because it is not guaranteed that you will be able to allocate
more than a page of kernel memory contiguously, you may need to be
explicitly aware of the limitation in your code anyways.
kmalloc based allocation can be realloced like this,
void *
realloc(void* old_ptr, size_t old_size,
size_t new_size, unsigned int mode)
{
void *buf;
buf = kmalloc(new_size, mode);
if (buf) {
memcpy(buf, old_ptr, ((old_size < new_size) ? old_size : new_size));
kfree(old_ptr);
}
return buf;
}
-Vinit
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