On Tue, Jun 12, 2018 at 6:28 AM, Baoquan He <bhe@xxxxxxxxxx> wrote:
> reparent_resources() is duplicated in arch/microblaze/pci/pci-common.c
> and arch/powerpc/kernel/pci-common.c, so move it to kernel/resource.c
> so that it's shared. Later its code also need be updated using list_head
> to replace singly linked list.
While this is a good deduplication of the code, some requirements for
public functions would be good to satisfy.
> +/*
> + * Reparent resource children of pr that conflict with res
> + * under res, and make res replace those children.
> + */
kernel doc format, though...
> +static int reparent_resources(struct resource *parent,
> + struct resource *res)
...is it really public with static keyword?!
> +{
> + for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) {
> + if (p->end < res->start)
> + continue;
> + if (res->end < p->start)
> + break;
> + if (p->start < res->start || p->end > res->end)
> + return -1; /* not completely contained */
Usually we are expecting real eeror codes.
> + if (firstpp == NULL)
> + firstpp = pp;
> + }
> + if (firstpp == NULL)
> + return -1; /* didn't find any conflicting entries? */
Ditto.
> +}
> +EXPORT_SYMBOL(reparent_resources);
--
With Best Regards,
Andy Shevchenko
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