Re: Confusion about unused variable warnings during kernel build.

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On Fri, Oct 31, 2008 at 07:23:04AM +0530, Manish Katiyar wrote:
> On Fri, Oct 31, 2008 at 12:42 AM, Marcin Slusarz
> <marcin.slusarz@xxxxxxxxx> wrote:
> > Check the definition of functions which "use" these variables.
> 
> I checked them and they are very much used. I can understand if they
> would have been in some #ifdef but that doesn't seem to be the case
> here.

I think the functions end up being #defined away into nothing,
in certain cases. In the first example you mentioned with
fs/lockd/svclock.c the vfs_lock_file function gets #defined as
"(-ENOLCK)" in include/linux/fs.h if CONFIG_FILE_LOCKING is not set,
so I guess that's how you configured your kernel.

Nick.

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