From: Linus Torvalds <torvalds@linux-foundation.org>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Jan Engelhardt <jengelh@computergmbh.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Arch Mailing List <linux-arch@vger.kernel.org>
Subject: Re: [PATCH 01/24] types: create <asm-generic/int-*.h>
Date: Fri, 25 Apr 2008 12:03:12 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.1.10.0804251158410.2779@woody.linux-foundation.org> (raw)
In-Reply-To: <20080425185251.GL14990@parisc-linux.org>
On Fri, 25 Apr 2008, Matthew Wilcox wrote:
>
> So ... given all this, why do we define s64 to be 'long' on some
> architectures and 'long long' on others?
Historical reasons, mainly. Once we start using one type for things like
loff_t, it ends up getting encoded in user header files, and we're then
basically forced to continue to use that particular type. Some of them end
literally being embedded in the compiler itself (ie __builtin_size_t etc
end up being known by compiler built-ins).
But yes, we could probably try to standardize the internal kernel s64/u64
types that don't end up spreading anywhere else.
Of course, part of the worry is probably that people thought that maybe
"long long" would some day be 128-bit on a 64-bit architecture.
Linus
next prev parent reply other threads:[~2008-04-25 19:11 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-24 23:05 [PATCH 00/24] Unify integer type definitions, and add fixed type constructor macros H. Peter Anvin
[not found] ` <1209078352-7593-2-git-send-email-hpa@zytor.com>
2008-04-24 23:05 ` [PATCH 01/24] types: create <asm-generic/int-*.h> H. Peter Anvin
2008-04-24 23:05 ` [PATCH 02/24] alpha: types: use <asm-generic/int-*.h> for the alpha architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 03/24] arm: types: use <asm-generic/int-*.h> for the arm architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 04/24] avr32: types: use <asm-generic/int-*.h> for the avr32 architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 05/24] blackfin: types: use <asm-generic/int-*.h> for the blackfin architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 06/24] cris: types: use <asm-generic/int-*.h> for the cris architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 07/24] frv: types: use <asm-generic/int-*.h> for the frv architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 08/24] h8300: types: use <asm-generic/int-*.h> for the h8300 architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 09/24] ia64: types: use <asm-generic/int-*.h> for the ia64 architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 10/24] m32r: types: use <asm-generic/int-*.h> for the m32r architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 11/24] m68k: types: use <asm-generic/int-*.h> for the m68k architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 12/24] mips: types: use <asm-generic/int-*.h> for the mips architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 13/24] mn10300: types: use <asm-generic/int-*.h> for the mn10300 architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 14/24] parisc: types: use <asm-generic/int-*.h> for the parisc architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 15/24] powerpc: types: use <asm-generic/int-*.h> for the powerpc architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 16/24] s390: types: use <asm-generic/int-*.h> for the s390 architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 17/24] sh: types: use <asm-generic/int-*.h> for the sh architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 18/24] sparc: types: use <asm-generic/int-*.h> for the sparc architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 19/24] sparc64: types: use <asm-generic/int-*.h> for the sparc64 architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 20/24] v850: types: use <asm-generic/int-*.h> for the v850 architecture H. Peter Anvin
2008-04-24 23:05 ` [PATCH 21/24] x86: types: use <asm-generic/int-*.h> for the x86 architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 22/24] xtensa: types: use <asm-generic/int-*.h> for the xtensa architecture H. Peter Anvin
2008-04-24 23:05 ` H. Peter Anvin
2008-04-24 23:05 ` [PATCH 23/24] types: add C99-style constructors to <asm-generic/int-*.h> H. Peter Anvin
2008-04-24 23:05 ` [PATCH 24/24] Use U64_C() instead of casts in kernel/time.c H. Peter Anvin
2008-04-25 0:44 ` [PATCH 19/24] sparc64: types: use <asm-generic/int-*.h> for the sparc64 architecture David Miller
2008-04-25 0:44 ` [PATCH 18/24] sparc: types: use <asm-generic/int-*.h> for the sparc architecture David Miller
2008-04-25 1:37 ` [PATCH 09/24] ia64: types: use <asm-generic/int-*.h> for the ia64 architecture Luck, Tony
2008-04-25 3:42 ` H. Peter Anvin
2008-04-25 4:10 ` [PATCH 24/24] Use U64_C() instead of casts in kernel/time.c H. Peter Anvin
2008-04-25 4:44 ` Luck, Tony
2008-04-25 0:14 ` [PATCH 03/24] arm: types: use <asm-generic/int-*.h> for the arm architecture Lennert Buytenhek
2008-04-25 18:27 ` [PATCH 01/24] types: create <asm-generic/int-*.h> Jan Engelhardt
2008-04-25 18:36 ` Linus Torvalds
2008-04-25 18:52 ` Matthew Wilcox
2008-04-25 19:03 ` Linus Torvalds [this message]
2008-04-25 19:10 ` H. Peter Anvin
2008-04-25 19:28 ` Matthew Wilcox
2008-04-25 19:38 ` H. Peter Anvin
2008-04-25 19:43 ` Jan Engelhardt
2008-04-25 19:45 ` Linus Torvalds
2008-04-25 19:48 ` H. Peter Anvin
2008-04-25 19:49 ` Harvey Harrison
2008-04-28 13:55 ` David Howells
2008-04-25 20:30 ` David Miller
2008-04-25 0:15 ` Lennert Buytenhek
2008-04-25 7:17 ` [PATCH 00/24] Unify integer type definitions, and add fixed type constructor macros Geert Uytterhoeven
2008-04-25 7:49 ` Andreas Schwab
2008-04-25 8:15 ` Arnd Bergmann
2008-04-27 17:44 ` H. Peter Anvin
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