On Mon, May 11, 2015 at 02:17:48PM +0300, Dan Carpenter wrote:
> Hello Naoya Horiguchi,
>
> The patch c8721bbbdd36: "mm: memory-hotplug: enable memory hotplug to
> handle hugepage" from Sep 11, 2013, leads to the following static
> checker warning:
>
> mm/hugetlb.c:1203 dissolve_free_huge_pages()
> warn: potential right shift more than type allows '9,18,64'
>
> mm/hugetlb.c
> 1189 void dissolve_free_huge_pages(unsigned long start_pfn, unsigned long end_pfn)
> 1190 {
> 1191 unsigned int order = 8 * sizeof(void *);
> ^^^^^^^^^^^^^^^^^^
> Let's say order is 64.
Actually, the 64 here is just chosen to be an impossibly high number
isn't it? It's a bit complicated to understand that at first glance.
regards,
dan carpenter
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