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Date: Mon, 3 Mar 2008 11:43:10 +0000
From: Russell King <rmk+lkml@....linux.org.uk>
To: David Howells <dhowells@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Arch Mailing List <linux-arch@...r.kernel.org>,
David Brownell <dbrownell@...rs.sourceforge.net>
Subject: Re: [PATCH 1/2] Add C99-style constructor macros for specific-sized integers
On Mon, Mar 03, 2008 at 10:57:32AM +0000, David Howells wrote:
> H. Peter Anvin <hpa@...or.com> wrote:
>
> > +#define S8_C(x) x
> > +#define U8_C(x) x ## U
> > +#define S16_C(x) x
> > +#define U16_C(x) x ## U
> > +#define S32_C(x) x
> > +#define U32_C(x) x ## U
> > +#define S64_C(x) x ## LL
> > +#define U64_C(x) x ## ULL
>
> And #if defined(__ASSEMBLY__), just splat x through as is.
We already have something like this on ARM - include/asm-arm/memory.h
/*
* Allow for constants defined here to be used from assembly code
* by prepending the UL suffix only with actual C code compilation.
*/
#ifndef __ASSEMBLY__
#define UL(x) (x##UL)
#else
#define UL(x) (x)
#endif
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
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