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Groups > linux.kernel > #1433863
| From | "Jan Beulich" <JBeulich@suse.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [Xen-devel] [PATCH] x86/xen: Use DIV_ROUND_UP |
| Date | 2016-06-29 17:40 +0200 |
| Message-ID | <rPpKO-5V4-31@gated-at.bofh.it> (permalink) |
| References | <rPphL-5KQ-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
>>> On 29.06.16 at 17:00, <amitoj1606@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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[PATCH] x86/xen: Use DIV_ROUND_UP Amitoj Kaur Chawla <amitoj1606@gmail.com> - 2016-06-29 17:10 +0200 Re: [Xen-devel] [PATCH] x86/xen: Use DIV_ROUND_UP Juergen Gross <jgross@suse.com> - 2016-06-29 17:40 +0200 Re: [Xen-devel] [PATCH] x86/xen: Use DIV_ROUND_UP "Jan Beulich" <JBeulich@suse.com> - 2016-06-29 17:40 +0200 Re: [Xen-devel] [PATCH] x86/xen: Use DIV_ROUND_UP David Vrabel <david.vrabel@citrix.com> - 2016-06-29 17:50 +0200
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