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SubjectRe: mm snapshot broken-out-2007-01-26-00-36.tar.gz uploaded
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On Sat, 27 Jan 2007 13:41:16 PST, Andrew Morton said:
> > > >> The mm snapshot broken-out-2007-01-26-00-36.tar.gz has been uploaded to
> > > >> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/mm/broken-out-2007-01-26-00-36.tar.gz
>
> > I have everything compiling now, mostly. The number of fixes which were
> > needed was just extraordinary. I'm thinking about making changes...

Aliens ate my brain, part 1:

I tried building an out-of-tree ipfilters (ipt_osf) that worked fine under
2.6.20-rc4-mm1. After much scratching my head and adding debugging info,
I discovered that this code was failing:

p = create_proc_entry("sys/net/ipv4/osf", S_IFREG | 0644, NULL);
if (!p) {
ipt_unregister_match(&osf_match);
return -ENXIO;
}

After much *more* head-scratching, and adding of printk's, I tracked it down
into fs/proc/generic.c, in xlate_proc_name:

len = next - cp;
for (de = de->subdir; de ; de = de->next) {
if (proc_match(len, cp, de))
break;
}
if (!de) {
rtn = -ENOENT;
goto out;

It appears that syssctl-reimplement-the-sysctl-proc-support.patch doesn't
bother setting the de->subdir, so xlate_proc_name isn't able to find sys/net.

What's the intended semantics of create_proc_entry and xlate_proc_name in
this new regime of no subdir pointers? Or am I just (yet again) one of the
first to trip over a bug?

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