From: Zachary Amsden <zach@vmware.com>
To: n l <walking.to.remember@gmail.com>
Cc: Giuliano Pochini <pochini@denise.shiny.it>, linux-kernel@vger.kernel.org
Subject: Re: why the interrupt handler should be marked "static" for it is never called directly from another file.
Date: Thu, 11 Aug 2005 08:41:10 -0700 [thread overview]
Message-ID: <42FB7196.8000408@vmware.com> (raw)
In-Reply-To: <6b5347dc0508110203345af854@mail.gmail.com>
n l wrote:
>I see, if a function in a module is not marked by static ,it can be
>accessed by any other function in kernel, while , using a static can
>avoid it .
>
>thanks a lot !!
>
>
>2005/8/11, Giuliano Pochini <pochini@denise.shiny.it>:
>
>
>>On Thu, 11 Aug 2005, n l wrote:
>>
>>
>>
>>>could you explain its reason for using static ?
>>>
>>>
>>Anything which is never referenced from another file should be
>>static in order to keep namespace pollution low.
>>
There is actually another very good reason as well. By marking
functions static, you are telling the compiler that they may be only
used in that file. This allows the compiler to remove unused functions,
which would be left in if implicitly declared "extern" by omitting the
static.
Zach
prev parent reply other threads:[~2005-08-11 15:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-11 8:33 why the interrupt handler should be marked "static" for it is never called directly from another file n l
2005-08-11 8:52 ` Giuliano Pochini
2005-08-11 9:03 ` n l
2005-08-11 15:41 ` Zachary Amsden [this message]
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