>>> On 29.06.16 at 17:00, <amitoj1...@gmail.com> wrote:
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
> @@ -591,7 +591,7 @@ static void xen_load_gdt(const struct desc_ptr *dtr)
> {
> unsigned long va = dtr->address;
> unsigned int size = dtr->size + 1;
> - unsigned pages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
> + unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
> unsigned long frames[pages];
> int f;
>
> @@ -640,7 +640,7 @@ static void __init xen_load_gdt_boot(const struct
> desc_ptr *dtr)
> {
> unsigned long va = dtr->address;
> unsigned int size = dtr->size + 1;
> - unsigned pages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
> + unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
> unsigned long frames[pages];
> int f;
>
Perhaps even more readable would be PFN_DOWN()?
Jan
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