On Tue, 29 May 2007 14:07:01 -0400 (EDT) Robert P. J. Day wrote:
> On Tue, 29 May 2007, Andrew Morton wrote:
>
> > On Tue, 29 May 2007 13:11:07 -0400 (EDT)
> > "Robert P. J. Day" <[email protected]> wrote:
> >
> > >
> > > Delete the apparently unused array "int dummy[5]" from struct
> > > inodes_stat_t.
> > >
> > > Signed-off-by: Robert P. J. Day <[email protected]>
> > >
> > > ---
> > >
> > > no idea what that array is for, but no one seems to care about it.
> > > removal compile-tested on x86 with "make allyesconfig" and nobody
> > > misses it (unless it's used for padding of some kind).
> > >
> > >
> > > diff --git a/include/linux/fs.h b/include/linux/fs.h
> > > index 7cf0c54..dec83dd 100644
> > > --- a/include/linux/fs.h
> > > +++ b/include/linux/fs.h
> > > @@ -44,7 +44,6 @@ extern int get_max_files(void);
> > > struct inodes_stat_t {
> > > int nr_inodes;
> > > int nr_unused;
> > > - int dummy[5];
> > > };
> > > extern struct inodes_stat_t inodes_stat;
> > >
> >
> > kernel/sysctl.c:
> >
> > {
> > .ctl_name = FS_STATINODE,
> > .procname = "inode-state",
> > .data = &inodes_stat,
> > .maxlen = 7*sizeof(int),
> > .mode = 0444,
> > .proc_handler = &proc_dointvec,
> > },
> >
> > akpm:/home/akpm> cat /proc/sys/fs/inode-state
> > 608039 178454 0 0 0 0 0
> >
> > So it _is_ used: to present those five zeroes. I think this is for
> > back-compatibility with some cretaceous-era kernel.
>
> ah, gotcha. well, i'll leave this up to someone else to do anything
> with if they are so inclined.
There's little to be done, except possibly put a /* comment */
on the struct's dummy line so that we don't go thru this again
in N years.
---
~Randy
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