2004-11-14 06:10:26

by William Lee Irwin III

[permalink] [raw]
Subject: Re: Parenthize nth_page() macro arg, in linux/mm.h.

On Sat, Nov 13, 2004 at 07:43:08PM +0000, Linux Kernel Mailing List wrote:
> ChangeSet 1.2092.7.2, 2004/11/13 14:43:08-05:00, [email protected]
> Parenthize nth_page() macro arg, in linux/mm.h.
> mm.h | 2 +-
> 1 files changed, 1 insertion(+), 1 deletion(-)
> diff -Nru a/include/linux/mm.h b/include/linux/mm.h
> --- a/include/linux/mm.h 2004-11-13 21:17:35 -08:00
> +++ b/include/linux/mm.h 2004-11-13 21:17:35 -08:00
> @@ -41,7 +41,7 @@
> #define MM_VM_SIZE(mm) TASK_SIZE
> #endif
> -#define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + n)
> +#define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))

Okay, #1 the ((page)) thing should be unnecessary. If it is necessary,
arch code is broken, which leads to #2: this came about because alpha
wasn't parenthesizing its args in pfn_to_page(); where did the fix for
that go?


-- wli


2004-11-14 06:18:59

by Al Viro

[permalink] [raw]
Subject: Re: Parenthize nth_page() macro arg, in linux/mm.h.

On Sat, Nov 13, 2004 at 10:10:16PM -0800, William Lee Irwin III wrote:
> On Sat, Nov 13, 2004 at 07:43:08PM +0000, Linux Kernel Mailing List wrote:
> > ChangeSet 1.2092.7.2, 2004/11/13 14:43:08-05:00, [email protected]
> > Parenthize nth_page() macro arg, in linux/mm.h.
> > mm.h | 2 +-
> > 1 files changed, 1 insertion(+), 1 deletion(-)
> > diff -Nru a/include/linux/mm.h b/include/linux/mm.h
> > --- a/include/linux/mm.h 2004-11-13 21:17:35 -08:00
> > +++ b/include/linux/mm.h 2004-11-13 21:17:35 -08:00
> > @@ -41,7 +41,7 @@
> > #define MM_VM_SIZE(mm) TASK_SIZE
> > #endif
> > -#define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + n)
> > +#define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
>
> Okay, #1 the ((page)) thing should be unnecessary. If it is necessary,
> arch code is broken, which leads to #2: this came about because alpha
> wasn't parenthesizing its args in pfn_to_page(); where did the fix for
> that go?

In my tree; I'm preparing -bk23-bird1 right now, will post in an hour or so.

2004-11-14 06:24:20

by William Lee Irwin III

[permalink] [raw]
Subject: Re: Parenthize nth_page() macro arg, in linux/mm.h.

On Sat, Nov 13, 2004 at 10:10:16PM -0800, William Lee Irwin III wrote:
>> Okay, #1 the ((page)) thing should be unnecessary. If it is necessary,
>> arch code is broken, which leads to #2: this came about because alpha
>> wasn't parenthesizing its args in pfn_to_page(); where did the fix for
>> that go?

On Sun, Nov 14, 2004 at 06:18:56AM +0000, Al Viro wrote:
> In my tree; I'm preparing -bk23-bird1 right now, will post in an hour or so.

Sounds good to me. Thanks for clearing up my misunderstanding.


-- wli