On Thu, 3 May 2007, Andrew Morton wrote:
> > +/**
> > + * fileset - an array of file pointers.
> > + * @files: the array of file pointers
> > + * @nr: number of elements in the array
> > + * @end: index to next unused file pointer
> > + */
> > +struct fileset {
> > + struct file **files;
> > + unsigned long nr;
> > + unsigned long end;
> > +};
>
> What's the locking protocol for all this?
What do you mean? There is no concurrent access going on here.
On Thu, 3 May 2007, Andrew Morton wrote:
> > +static void free_fset(struct fileset *fset)
> > +{
> > + int i;
> > +
> > + for (i = fset->end; i < fset->nr; i++)
> > + fput(fset->files[i]);
> > +
> > + kfree(fset->files);
> > + kfree(fset);
> > +}
>
> Confused. Shouldn't it be
>
> for (i = 0; i < fset->end; i++)
No. The fset->end is an index to the first _unused_ file pointer. All
entries before that are in use by revoked file descriptors so we don't
want to fput() them.
Pekka
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