linux-kernel - Re: [PATCH] kernel/time.c: Silence gcc warning 'integer constant to large for long type'

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Date:	Fri, 2 May 2008 15:17:00 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	"Carlos R. Mafra" <crmafra@....unesp.br>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kernel/time.c: Silence gcc warning 'integer constant to
 large for long type'



On Fri, 2 May 2008, H. Peter Anvin wrote:
> 
> That's more or less what my other patchset does.  It's a bit more complex
> (because it gets the suffixes via macros, to get the right suffixes), but most
> of it is pure cleanup of the way we handle integers in architecture includes:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-inttypes.git

This is *still* wrong.

That C type prefix should be at the *define*, not the use of those macros.

The thing is, if C code needs to do

	U64_C(HZ_TO_USEC_MUL32)

to use the macro HZ_TO_USEC_MUL32, then that is a *bug* in the macro.

That kind of stuff should not be visible to users of plain constants!

		Linus
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