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From: Steven Rostedt <rostedt@goodmis.org>
To: Nikita Danilov <nikita@clusterfs.com>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	matthew@wil.cx, arjan@infradead.org, hch@infradead.org,
	mingo@elte.hu, tglx@linutronix.de, akpm@osdl.org,
	alan@lxorguk.ukuu.org.uk, Paul Jackson <pj@sgi.com>,
	David Howells <dhowells@redhat.com>,
	Linus Torvalds <torvalds@osdl.org>
Subject: Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation
Date: Thu, 15 Dec 2005 15:58:27 -0500	[thread overview]
Message-ID: <1134680307.13138.74.camel@localhost.localdomain> (raw)
In-Reply-To: <17313.46085.921398.819760@gargle.gargle.HOWL>

On Thu, 2005-12-15 at 21:20 +0300, Nikita Danilov wrote:

> Going off at a tangent (or tangle, rather), why do we need DECLARE_FOO()
> macros at all? They
> 
>  - do not look like C variable declarations, hide variable type, and
>  hence are confusing,
> 
>  - contrary to their naming actually _define_ rather than _declare_ an
>  object.
> 
> In most cases 
> 
>         type var = INIT_FOO;
> 
> is much better (more readable and easier to understand) than
> 
>         DECLARE_FOO(var); /* what is the type of var? */
> 
> In the cases where initializer needs an address of object being
> initialized
> 
>         type var = INIT_FOO(var);
> 
> can be used.

That's just error prone.  In the RT patch we had several bugs caused by
cut and paste errors like:

type foo = INIT_TYPE(foo);
type bar = INIT_TYPE(foo);

These are not always easy to find.

-- Steve



  reply	other threads:[~2005-12-15 20:58 UTC|newest]

Thread overview: 249+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-12 23:45 [PATCH 1/19] MUTEX: Introduce simple mutex implementation David Howells
2005-12-12 23:45 ` [PATCH 2/19] MUTEX: i386 arch mutex David Howells
2005-12-12 23:45 ` [PATCH 5/19] MUTEX: Core kernel changes David Howells
2005-12-12 23:45 ` [PATCH 3/19] MUTEX: x86_64 arch mutex David Howells
2005-12-12 23:45 ` [PATCH 8/19] MUTEX: Drivers I-K changes David Howells
2005-12-12 23:45 ` [PATCH 4/19] MUTEX: FRV arch mutex David Howells
2005-12-12 23:45 ` [PATCH 6/19] MUTEX: Drivers A-E changes David Howells
2005-12-12 23:45 ` [PATCH 7/19] MUTEX: Drivers F-H changes David Howells
2005-12-12 23:45 ` [PATCH 11/19] MUTEX: Drivers Q-S changes David Howells
2005-12-12 23:45 ` [PATCH 14/19] MUTEX: First set of include changes David Howells
2005-12-12 23:45 ` [PATCH 13/19] MUTEX: Filesystem changes David Howells
2005-12-12 23:45 ` [PATCH 10/19] MUTEX: Drivers N-P changes David Howells
2005-12-12 23:45 ` [PATCH 12/19] MUTEX: Drivers T-Z changes David Howells
2005-12-12 23:45 ` [PATCH 9/19] MUTEX: Drivers L-M changes David Howells
2005-12-12 23:45 ` [PATCH 15/19] MUTEX: Second set of include changes David Howells
2005-12-12 23:45 ` [PATCH 19/19] MUTEX: Sound changes David Howells
2005-12-12 23:45 ` [PATCH 17/19] MUTEX: Networking changes David Howells
2005-12-12 23:45 ` [PATCH 18/19] MUTEX: Security changes David Howells
2005-12-12 23:45 ` [PATCH 16/19] MUTEX: IPC changes David Howells
2005-12-13  0:13 ` [PATCH 1/19] MUTEX: Introduce simple mutex implementation Nick Piggin
2005-12-13  9:54   ` David Howells
2005-12-13 10:13     ` Ingo Molnar
2005-12-13 10:34       ` Ingo Molnar
2005-12-13 10:37         ` Ingo Molnar
2005-12-13 12:47         ` Oliver Neukum
2005-12-13 13:09           ` Alan Cox
2005-12-13 13:13             ` Matthew Wilcox
2005-12-13 14:04               ` Alan Cox
2005-12-13 13:24             ` Oliver Neukum
2005-12-14  1:00     ` Nick Piggin
2005-12-14 10:54       ` David Howells
2005-12-14 11:17         ` Nick Piggin
2005-12-14 11:46           ` David Howells
2005-12-14 21:23             ` Nick Piggin
2005-12-16 12:00               ` David Howells
2005-12-16 13:16                 ` Nick Piggin
2005-12-16 15:53                   ` David Howells
2005-12-16 23:41                     ` Nick Piggin
2005-12-16 16:02                   ` David Howells
2005-12-13  0:19 ` Nick Piggin
2005-12-13 11:23   ` David Howells
2005-12-13 11:34     ` David Howells
2005-12-13  0:19 ` Andrew Morton
2005-12-13  7:54   ` Ingo Molnar
2005-12-13  7:58     ` Andi Kleen
2005-12-13  8:42       ` Andrew Morton
2005-12-13  8:49         ` Andi Kleen
2005-12-13  9:01           ` Andrew Morton
2005-12-13  9:02             ` Andrew Morton
2005-12-13 10:07               ` Jakub Jelinek
2005-12-13 10:11                 ` Andi Kleen
2005-12-13 10:15                   ` Jakub Jelinek
2005-12-13 10:25                   ` Andrew Morton
2005-12-14 10:46               ` Russell King
2005-12-13  9:05             ` Andi Kleen
2005-12-13  9:15               ` Andrew Morton
2005-12-13  9:24                 ` Andi Kleen
2005-12-13  9:44                   ` Andrew Morton
2005-12-13  9:49                     ` Andi Kleen
2005-12-13 10:28                   ` Andreas Schwab
2005-12-13 10:30                     ` Andi Kleen
2005-12-13 12:33                   ` Matthew Wilcox
2005-12-13 22:18               ` Adrian Bunk
2005-12-13 22:25                 ` Andi Kleen
2005-12-13 22:32                   ` Adrian Bunk
2005-12-13  9:11             ` Ingo Molnar
2005-12-13  9:04           ` Christoph Hellwig
2005-12-13  9:13             ` Ingo Molnar
2005-12-13 10:11             ` Jakub Jelinek
2005-12-13 10:19               ` Christoph Hellwig
2005-12-13 10:27                 ` Ingo Molnar
2005-12-15  4:53                 ` Miles Bader
2005-12-15  5:05                   ` Nick Piggin
2005-12-13  9:09           ` Ingo Molnar
2005-12-13  9:21             ` Andi Kleen
2005-12-13 16:16           ` Linus Torvalds
2005-12-13 21:56             ` Using C99 in the kernel was " Andi Kleen
2005-12-13 23:05               ` Al Viro
2005-12-13 23:41                 ` Andi Kleen
2005-12-13  9:03         ` Christoph Hellwig
2005-12-13  9:14           ` Andrew Morton
2005-12-13  9:21             ` Christoph Hellwig
2005-12-13 10:31             ` drivers/scsi/sd.c gcc-2.95.3 Alexey Dobriyan
2005-12-13  8:00     ` [PATCH 1/19] MUTEX: Introduce simple mutex implementation Arjan van de Ven
2005-12-13  9:03       ` Ingo Molnar
2005-12-13  9:09         ` Andi Kleen
2005-12-13  9:34           ` Ingo Molnar
2005-12-13 14:33             ` Mark Lord
2005-12-13 14:45               ` Arjan van de Ven
2005-12-13  9:37           ` Ingo Molnar
2005-12-13  9:19         ` Arjan van de Ven
2005-12-13  9:02     ` Christoph Hellwig
2005-12-13  9:39       ` Ingo Molnar
2005-12-13 10:00         ` Ingo Molnar
2005-12-13 17:40           ` Paul Jackson
2005-12-13 18:34             ` David Howells
2005-12-13 22:31               ` Paul Jackson
2005-12-14 11:02                 ` David Howells
2005-12-14 11:12                   ` David Howells
2005-12-14 11:18                     ` Alan Cox
2005-12-14 12:35                       ` David Howells
2005-12-14 13:58                         ` Thomas Gleixner
2005-12-14 23:40                           ` Mark Lord
2005-12-14 23:54                             ` Andrew Morton
2005-12-15 13:41                               ` Nikita Danilov
2005-12-15 14:56                                 ` Alan Cox
2005-12-15 15:52                                   ` Nikita Danilov
2005-12-15 15:55                                     ` David Howells
2005-12-15 16:22                                       ` linux-os (Dick Johnson)
2005-12-15 16:28                                       ` Linus Torvalds
2005-12-15 16:51                                         ` David Howells
2005-12-15 17:04                                         ` Thomas Gleixner
2005-12-15 17:09                                         ` Paul Jackson
2005-12-15 17:17                                           ` David Howells
2005-12-15 16:56                                       ` Paul Jackson
2005-12-15 17:28                                         ` David Howells
2005-12-15 17:48                                           ` Linus Torvalds
2005-12-15 18:20                                             ` Nikita Danilov
2005-12-15 20:58                                               ` Steven Rostedt [this message]
2005-12-15 19:21                                             ` Andrew Morton
2005-12-15 19:38                                               ` Linus Torvalds
2005-12-15 20:28                                               ` Steven Rostedt
2005-12-15 20:32                                                 ` Geert Uytterhoeven
2005-12-16 21:41                                                   ` Thomas Gleixner
2005-12-16 21:41                                                     ` Linus Torvalds
2005-12-16 22:06                                                       ` Thomas Gleixner
2005-12-16 22:19                                                         ` Linus Torvalds
2005-12-16 22:32                                                           ` Steven Rostedt
2005-12-16 22:42                                                           ` Thomas Gleixner
2005-12-16 22:41                                                             ` Linus Torvalds
2005-12-16 22:49                                                               ` Steven Rostedt
2005-12-16 23:29                                                               ` Thomas Gleixner
2005-12-17  0:29                                                               ` Joe Korty
2005-12-17  1:00                                                                 ` Linus Torvalds
2005-12-17  3:13                                                                   ` Steven Rostedt
2005-12-17  7:34                                                                     ` Linus Torvalds
2005-12-17 23:43                                                                       ` Matthew Wilcox
2005-12-18  0:05                                                                         ` Lee Revell
2005-12-18  0:21                                                                           ` Matthew Wilcox
2005-12-18  1:25                                                                             ` Lee Revell
2005-12-22 12:27                                                                         ` Bill Huey
2005-12-19 16:08                                                                       ` Ingo Molnar
2005-12-22 12:40                                                                       ` Bill Huey
2005-12-22 12:45                                                                         ` Bill Huey
2005-12-19 23:46                                                                   ` Keith Owens
2005-12-15 16:50                                     ` Christopher Friesen
2005-12-15 20:53                                       ` Steven Rostedt
2005-12-15 14:41                               ` Steven Rostedt
2005-12-15 15:37                               ` David Howells
2005-12-15 19:28                                 ` Andrew Morton
2005-12-15 20:18                                   ` Andrew Morton
2005-12-15 21:28                                     ` Steven Rostedt
2005-12-16 10:45                                     ` David Howells
2005-12-16 22:02                                     ` Thomas Gleixner
2005-12-14 23:57                             ` Thomas Gleixner
2005-12-14 23:57                               ` Mark Lord
2005-12-15  0:10                                 ` Thomas Gleixner
2005-12-15  2:46                                   ` Linus Torvalds
2005-12-15 15:53                                     ` David Howells
2005-12-13  9:55     ` Ingo Molnar
2005-12-13 10:48   ` David Howells
2005-12-13 12:39     ` Matthew Wilcox
2005-12-13  0:30 ` Arnd Bergmann
2005-12-13 21:03   ` David Howells
2005-12-13  0:57 ` Daniel Walker
2005-12-13  3:23   ` Steven Rostedt
2005-12-13  2:57 ` Mark Lord
2005-12-13  3:17   ` Steven Rostedt
2005-12-13  9:06   ` Christoph Hellwig
2005-12-13 10:54 ` Ingo Molnar
2005-12-13 11:24   ` David Howells
2005-12-13 13:45     ` Ingo Molnar
2005-12-13 13:05 ` Alan Cox
2005-12-13 13:15   ` Alan Cox
2005-12-13 23:21     ` Nikita Danilov
2005-12-13 13:32   ` David Howells
2005-12-13 14:00     ` Alan Cox
2005-12-13 15:23       ` David Howells
2005-12-15  5:24         ` Miles Bader
2005-12-13 14:35     ` Christopher Friesen
2005-12-13 14:44       ` Arjan van de Ven
2005-12-13 14:59         ` Christopher Friesen
2005-12-13 15:39       ` David Howells
2005-12-13 16:10         ` Alan Cox
2005-12-14 10:29           ` Arjan van de Ven
2005-12-14 11:03             ` Arjan van de Ven
2005-12-14 11:03             ` Alan Cox
2005-12-14 11:08               ` Arjan van de Ven
2005-12-14 11:24                 ` Alan Cox
2005-12-14 11:35                   ` Andrew Morton
2005-12-14 11:44                     ` Arjan van de Ven
2005-12-14 11:52                       ` Andi Kleen
2005-12-14 11:55                         ` Arjan van de Ven
2005-12-14 11:57                       ` David Howells
2005-12-14 12:19                         ` Jakub Jelinek
2005-12-16  1:54                         ` Nick Piggin
2005-12-16 11:02                           ` David Howells
2005-12-16 11:30                             ` David Howells
2005-12-16 16:33                               ` Linus Torvalds
2005-12-16 22:23                                 ` David S. Miller
2005-12-16 22:38                                   ` Linus Torvalds
2005-12-16 22:53                                     ` David S. Miller
2005-12-17  0:41                                       ` Jesse Barnes
2005-12-17  7:10                                         ` David S. Miller
2005-12-17  7:40                                           ` Linus Torvalds
2005-12-17 17:22                                             ` Jesse Barnes
2005-12-17 17:19                                           ` Jesse Barnes
2005-12-17 22:38                                       ` Richard Henderson
2005-12-17 23:05                                         ` David S. Miller
2005-12-16 13:01                             ` Nick Piggin
2005-12-16 13:21                               ` Russell King
2005-12-16 13:41                                 ` Nick Piggin
2005-12-16 13:46                                 ` Linh Dang
2005-12-16 14:31                                   ` Russell King
2005-12-16 15:24                                     ` Linh Dang
2005-12-16 15:35                                       ` Nick Piggin
2005-12-16 15:40                                       ` Kyle Moffett
2005-12-16 15:46                                     ` David Howells
2005-12-16 15:58                                       ` Russell King
2005-12-16 15:49                                     ` Linh Dang
2005-12-17 15:57                               ` Nikita Danilov
2005-12-16 16:28                             ` Linus Torvalds
2005-12-14 12:17                     ` Christoph Hellwig
2005-12-14 11:42                   ` Arjan van de Ven
2005-12-14  8:31         ` Ingo Molnar
2005-12-13 20:04     ` Steven Rostedt
  -- strict thread matches above, loose matches on Subject: below --
2005-12-15 13:58 linux
2005-12-15 16:15 ` Linus Torvalds
2005-12-15 16:52   ` Erik Mouw
2005-12-15 17:23     ` Dick Streefland
2005-12-16 12:17     ` Erik Mouw
2005-12-17 10:59       ` Sander
2005-12-17 14:14         ` Douglas McNaught
2005-12-17 15:09           ` Sander
2005-12-19 10:44         ` Erik Mouw
2005-12-15 19:02   ` Nikita Danilov
2005-12-15 19:09   ` linux
2005-12-15 19:52     ` Linus Torvalds
2005-12-16  1:33       ` linux
2005-12-15 21:18     ` Steven Rostedt
2005-12-15 20:52   ` Steven Rostedt
2005-12-15 17:45 Luck, Tony
2005-12-15 18:00 ` David Howells
2005-12-15 18:48 ` James Bottomley
2005-12-15 20:38 ` Jeff Dike
2005-12-15 23:45   ` Stephen Rothwell
2005-12-16 12:49 linux
2005-12-16 15:24 ` David Howells
2005-12-16 18:03   ` linux

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