From: Paulo Marques <pmarques@grupopie.com>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Jiri Slaby <jirislaby@gmail.com>,
Om Narasimhan <om.turyx@gmail.com>,
linux-kernel@vger.kernel.org, kernel-janitors@lists.osdl.org
Subject: Re: [KJ] kmalloc to kzalloc patches for drivers/block [sane version]
Date: Fri, 22 Sep 2006 13:03:13 +0000 [thread overview]
Message-ID: <4513DF11.802@grupopie.com> (raw)
In-Reply-To: <84144f020609220503n4c495542x2130165e371ec85c@mail.gmail.com>
Pekka Enberg wrote:
> On 9/22/06, Paulo Marques <pmarques@grupopie.com> wrote:
>> Agreed on every comment except this one. That complex expression is
>> really just a constant in the end, so there is no point in using kcalloc.
>
> The code is arguably easier to read with kcalloc.
I was afraid the kcalloc call would have the added overhead of an extra
parameter and a multiplication, but since it is actually declared as a
static inline, gcc should optimize everything away (because both
parameters are constants) and give the same result in the end.
So, its fine by me either way.
--
Paulo Marques - www.grupopie.com
"The face of a child can say it all, especially the
mouth part of the face."
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WARNING: multiple messages have this Message-ID (diff)
From: Paulo Marques <pmarques@grupopie.com>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Jiri Slaby <jirislaby@gmail.com>,
Om Narasimhan <om.turyx@gmail.com>,
linux-kernel@vger.kernel.org, kernel-janitors@lists.osdl.org
Subject: Re: [KJ] kmalloc to kzalloc patches for drivers/block [sane version]
Date: Fri, 22 Sep 2006 14:03:13 +0100 [thread overview]
Message-ID: <4513DF11.802@grupopie.com> (raw)
In-Reply-To: <84144f020609220503n4c495542x2130165e371ec85c@mail.gmail.com>
Pekka Enberg wrote:
> On 9/22/06, Paulo Marques <pmarques@grupopie.com> wrote:
>> Agreed on every comment except this one. That complex expression is
>> really just a constant in the end, so there is no point in using kcalloc.
>
> The code is arguably easier to read with kcalloc.
I was afraid the kcalloc call would have the added overhead of an extra
parameter and a multiplication, but since it is actually declared as a
static inline, gcc should optimize everything away (because both
parameters are constants) and give the same result in the end.
So, its fine by me either way.
--
Paulo Marques - www.grupopie.com
"The face of a child can say it all, especially the
mouth part of the face."
next prev parent reply other threads:[~2006-09-22 13:03 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-18 0:53 [KJ] kmalloc to kzalloc patches for drivers/mfd Om Narasimhan
2006-09-18 0:53 ` Om Narasimhan
2006-09-18 0:53 ` [KJ] kmalloc to kzalloc patches for drivers/atm Om Narasimhan
2006-09-18 0:53 ` Om Narasimhan
2006-09-18 1:19 ` [KJ] " Dmitry Torokhov
2006-09-18 1:19 ` Dmitry Torokhov
2006-09-18 9:42 ` [KJ] " Alan Cox
2006-09-18 9:42 ` Alan Cox
2006-09-18 12:07 ` [KJ] " Pekka Enberg
2006-09-18 12:07 ` Pekka Enberg
2006-09-18 0:53 ` [KJ] kmalloc to kzalloc patches for drivers/base Om Narasimhan
2006-09-18 0:53 ` Om Narasimhan
2006-09-18 1:08 ` [KJ] " Dmitry Torokhov
2006-09-18 1:08 ` Dmitry Torokhov
2006-09-18 2:27 ` [KJ] " Om Narasimhan
2006-09-18 2:27 ` Om Narasimhan
2006-09-18 9:40 ` [KJ] " Alan Cox
2006-09-18 9:40 ` Alan Cox
2006-09-18 12:31 ` [KJ] " Greg KH
2006-09-18 12:31 ` Greg KH
2006-09-18 0:54 ` [KJ] kmalloc to kzalloc patches for drivers/block Om Narasimhan
2006-09-18 0:54 ` Om Narasimhan
2006-09-18 9:43 ` [KJ] kmalloc to kzalloc patches for drivers/mfd Alan Cox
2006-09-18 9:43 ` Alan Cox
2006-09-21 6:11 ` [KJ] kmalloc to kzalloc patches for drivers/block [sane version] Om Narasimhan
2006-09-21 6:11 ` Om Narasimhan
2006-09-21 7:20 ` [KJ] " Nishanth Aravamudan
2006-09-21 7:20 ` Nishanth Aravamudan
2006-09-22 5:40 ` Om Narasimhan
2006-09-22 5:40 ` Om Narasimhan
2006-09-22 6:04 ` Om Narasimhan
2006-09-22 6:04 ` Om Narasimhan
2006-09-22 8:43 ` Jiri Slaby
2006-09-22 8:43 ` Jiri Slaby
2006-09-22 11:32 ` Paulo Marques
2006-09-22 11:32 ` Paulo Marques
2006-09-22 12:03 ` Pekka Enberg
2006-09-22 12:03 ` Pekka Enberg
2006-09-22 13:03 ` Paulo Marques [this message]
2006-09-22 13:03 ` Paulo Marques
2006-09-22 13:45 ` Dmitry Torokhov
2006-09-22 13:45 ` Dmitry Torokhov
2006-09-22 22:55 ` Om Narasimhan
2006-09-22 22:55 ` Om Narasimhan
2006-09-22 8:36 ` Jiri Slaby
2006-09-22 8:36 ` Jiri Slaby
2006-09-22 11:28 ` Paulo Marques
2006-09-22 11:28 ` Paulo Marques
2006-09-21 7:12 ` [KJ] kmalloc to kzalloc patches for drivers/atm " Om Narasimhan
2006-09-21 7:12 ` Om Narasimhan
2006-09-21 13:36 ` [KJ] " Dmitry Torokhov
2006-09-21 13:36 ` Dmitry Torokhov
2006-09-22 5:29 ` [KJ] " Om Narasimhan
2006-09-22 5:29 ` Om Narasimhan
2006-09-21 7:35 ` [KJ] kmalloc to kzalloc patches for drivers/block " Thomas Petazzoni
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