Groups > linux.kernel > #1219827

Re: [PATCH] net/core/sysctl_net_core.c unused variable

From	Joe Perches <joe@perches.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] net/core/sysctl_net_core.c unused variable
Date	2015-09-06 18:00 +0200
Message-ID	<q5Kwh-3cv-1@gated-at.bofh.it> (permalink)
References	<q5J7c-1k0-7@gated-at.bofh.it> <q5JAd-1RS-7@gated-at.bofh.it> <q5JTz-2tP-15@gated-at.bofh.it> <q5KcW-2Q9-11@gated-at.bofh.it> <q5KcW-2Q9-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Sun, 2015-09-06 at 16:36 +0100, Nick Warne wrote:
> On 06/09/15 16:28, Joe Perches wrote:
> > On Sun, 2015-09-06 at 16:16 +0100, Nick Warne wrote:
> >> On 06/09/15 15:52, Joe Perches wrote:
> >> > On Sun, 2015-09-06 at 15:13 +0100, Nick Warne wrote:
> >> >> gcc version 4.8.2 (GCC) warns that 'static int one = 1;' is declared but
> >> >> not used in file net/core/sysctl_net_core.c.
> >> >
> >> > Only when CONFIG_NET isn't set.
> >>
> >> CONFIG_NET=y
> >>
> >> Peculiar indeed.
> >>
> >> >> Reading the file, that is
> >> >> the case.  Attached is a patch to remove it.
> >> >
> >> > $ git grep -w -n one net/core/sysctl_net_core.c
> >> > net/core/sysctl_net_core.c:26:static int one = 1;
> >> > net/core/sysctl_net_core.c:332:         .extra2         = &one
> >> >
> >> >> Signed-off-by:  Nick Warne <nick@linicks.net>
> >> >
> >> > Please use grep to augment reading.
> >>
> >> grep -w -n one net/core/sysctl_net_core.c
> >> 26:static int one = 1;
> >>
> >> ?
> >>
> >> I just don't have the &one.
> >>
> >> I am confused now.
> >
> > What source tree are you using?
> 
> Latest longterm 3.18.21

OK, it's important to mention that otherwise the
assumption would be a git tree like net or net-next.

> > What changes in what branch exist?
> 
> I am not using git (if that is what you mean by 'branches') - just 
> tarballs from kernel.org

(OK, using git and linux-stable)

$ git grep -w -n one v3.18.21 -- net/core/sysctl_net_core.c
v3.18.21:net/core/sysctl_net_core.c:26:static int one = 1;

And the responsible commit:

commit c48cf4f27d4555a455c3fef71137bd0fc44d1656
("net: sysctl_net_core: check SNDBUF and RCVBUF for min length")



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Thread

[PATCH] net/core/sysctl_net_core.c  unused variable Nick Warne <nick@linicks.net> - 2015-09-06 16:30 +0200
  Re: [PATCH] net/core/sysctl_net_core.c  unused variable Joe Perches <joe@perches.com> - 2015-09-06 17:00 +0200
    Re: [PATCH] net/core/sysctl_net_core.c  unused variable Nick Warne <nick@linicks.net> - 2015-09-06 17:20 +0200
      Re: [PATCH] net/core/sysctl_net_core.c  unused variable Nick Warne <nick@linicks.net> - 2015-09-06 17:40 +0200
        Re: [PATCH] net/core/sysctl_net_core.c  unused variable Joe Perches <joe@perches.com> - 2015-09-06 18:00 +0200
          Re: [PATCH] net/core/sysctl_net_core.c  unused variable Nick Warne <nick@linicks.net> - 2015-09-06 18:10 +0200

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