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SubjectRe: [PATCH 5/5] CUSE: implement CUSE - Character device in Userspace
On Thu, Aug 28, 2008 at 01:07:40PM -0700, Andrew Morton wrote:
> On Fri, 29 Aug 2008 03:19:04 +0900
> Tejun Heo <tj@kernel.org> wrote:
> > +#define fc_to_cc(_fc) container_of((_fc), struct cuse_conn, fc)
> > +#define cdev_to_cc(_cdev) container_of((_cdev), struct cuse_conn, cdev)
> > +#define cuse_conn_get(cc) ({mntget((cc)->mnt); cc;})
> > +#define cuse_conn_put(cc) mntput((cc)->mnt)
>
> I believe all the above could be implemented in C.

"traditionally" container_of() is used in #define, not a function call
as it is just pointer math that can be done at compile time.

thanks,

greg k-h


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