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SubjectRe: [PATCH] RCU: Reduce size of rcu_head 1 of 2
On Fri, Aug 01, 2003 at 06:16:44PM -0700, Mitchell Blank Jr wrote:
> Andrew Morton wrote:
> > > Gratuitous change to API during stable series BAD BAD BAD. If
> > > you drop this it stays as is until 2.8. The extra arg in
> > > unneccessary, but breaking it is worse.
> >
> > There won't be any out-of-tree users by then.
> I must be misunderstanding something. If the point of the patch is to
> shrink "struct rcu_head" (which it seems to do) won't that change
> offsets in all sorts of things like "struct dentry"? I know we
> officially don't care about binary modules but a change like that
> seems pretty gratuitous for such a small gain.

Repeat after me: there is no module ABI.

Matt Mackall : : of or relating to the moon
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