Re: [PATCH] removes unused variable from kernel/sysctl.h
From: Jaswinder Singh Rajput
Date: Thu Apr 16 2009 - 15:06:41 EST
Hello Sukanto,
On Thu, 2009-04-16 at 23:22 +0530, Sukanto Ghosh wrote:
> This patch removes the unused variable 'val' from the
> __do_proc_dointvec() function
> in kernel/sysctl.h. The integer has been declared and used as 'val =
> -val' and there is
> no reference to it anywhere.
> Although I am this doesn't affects the kernel binary because gcc
> removes it, still it
> might be confusing for people reading the code.
>
This patch is already submitted by Tomohiro Kusumi on Thu Dec 27 2007:
http://lkml.indiana.edu/hypermail/linux/kernel/0712.3/0557.html
>
> Signed-off-by: Sukanto Ghosh <sukanto.cse.iitb@xxxxxxxxx>
>
> ----
>
> --- linux-2.6.29.1/kernel/sysctl.c.orig 2009-04-16 19:57:21.000000000 +0530
> +++ linux-2.6.29.1/kernel/sysctl.c 2009-04-16 19:58:26.000000000 +0530
> @@ -2198,7 +2198,7 @@ static int __do_proc_dointvec(void *tbl_
> void *data)
This is a very old function and have almost no git history, its old name
was do_proc_dointvec on 2005-04-16 15:20:36 when git tree was made and
then only(almost) function name is changed.
> {
> #define TMPBUFLEN 21
> - int *i, vleft, first=1, neg, val;
> + int *i, vleft, first=1, neg;
> unsigned long lval;
> size_t left, len;
>
> @@ -2251,8 +2251,6 @@ static int __do_proc_dointvec(void *tbl_
> len = p-buf;
> if ((len < left) && *p && !isspace(*p))
> break;
> - if (neg)
> - val = -val;
So you need to do further investigation. Is this a typo or some other
mistake.
--
JSR
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