lkml.org 
[lkml]   [2009]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: mmotm 2009-01-14-20-31 uploaded (gfs2)
From
Date
Hi,

On Fri, 2009-01-16 at 08:43 -0800, Andrew Morton wrote:
> On Fri, 16 Jan 2009 10:20:03 +0000 Steven Whitehouse <swhiteho@redhat.com> wrote:
>
> > Hi,
> >
> > On Thu, 2009-01-15 at 11:13 -0800, Randy Dunlap wrote:
> > > akpm@linux-foundation.org wrote:
> > > > The mm-of-the-moment snapshot 2009-01-14-20-31 has been uploaded to
> > > >
> > > > http://userweb.kernel.org/~akpm/mmotm/
> > > >
> > > > and will soon be available at
> > > >
> > > > git://git.zen-sources.org/zen/mmotm.git
> > >
> > >
> > > when CONFIG_FILE_LOCKING=n:
> > >
> > > mmotm-2009-0114-2031/fs/gfs2/ops_file.c:746: error: 'generic_setlease' undeclared here (not in a function)
> > >
> > >
> > > since generic_setlease() is a macro/define in that case.
> > >
> > Hmm, it looks like I'll have to do this, in that case:
> >
> > diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
> > index 99d726f..4580335 100644
> > --- a/fs/gfs2/ops_file.c
> > +++ b/fs/gfs2/ops_file.c
> > @@ -743,7 +743,9 @@ const struct file_operations *gfs2_file_fops_nolock = &(const struct file_operat
> > .fsync = gfs2_fsync,
> > .splice_read = generic_file_splice_read,
> > .splice_write = generic_file_splice_write,
> > +#ifdef CONFIG_FILE_LOCKING
> > .setlease = generic_setlease,
> > +#endif /* CONFIG_FILE_LOCKING */
> > };
> >
> > const struct file_operations *gfs2_dir_fops_nolock = &(const struct file_operations){
> >
> >
> > which is not ideal, but I don't see any easy way to avoid the #ifdef,
> >
>
> Take a look in fs.h:
>
> #define generic_setlease(a, b, c) ({ -EINVAL; })
>
> If that wasn't a stupid macro, your code would have compiled and ran
> just as intended.
>
There doesn't seem to be an easy answer though. If I #define it to NULL,
that upsets other parts of the code that rely on that macro, and if I
turn it into a inline function which returns -EINVAL, then presumably I
can't take its address for my file_operations.

I could create a small function which then calls generic_setlease I
suppose, but is that any better than this? Its not really very neat
which ever I choose :(

Steve.




\
 
 \ /
  Last update: 2009-01-16 18:07    [W:0.049 / U:0.428 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site