On 02/01/18 at 06:15am, Dave Hansen wrote:
> On 01/31/2018 11:19 PM, Baoquan He wrote:
> > for_each_present_section_nr(0, pnum) {
> > + struct mem_section *ms;
> > + ms = __nr_to_section(pnum);
> > usemap = usemap_map[pnum];
> > - if (!usemap)
> > + if (!usemap) {
> > +#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
> > + ms->section_mem_map = 0;
> > +#endif
> > continue;
> > + }
> >
> > #ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
> > map = map_map[pnum];
> > #else
> > map = sparse_early_mem_map_alloc(pnum);
> > #endif
> > - if (!map)
> > + if (!map) {
> > +#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
> > + ms->section_mem_map = 0;
> > +#endif
> > continue;
> > + }
>
> This is starting to look like code that only a mother could love. Can
> this be cleaned up a bit?
Sorry, will try. Just wonder why we don't need to clear
ms->section_mem_map when CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER is not
set. Will look into to find reason.
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