[PATCH 2/2] move unneeded data to initdata section
Denis V. Lunev
den at sw.ru
Thu Nov 15 11:17:14 PST 2007
Sam Ravnborg wrote:
> On Thu, Nov 15, 2007 at 11:19:26AM -0700, Eric W. Biederman wrote:
>> Sam Ravnborg <sam at ravnborg.org> writes:
>>
>>> On Thu, Nov 15, 2007 at 05:42:04PM +0300, Denis V. Lunev wrote:
>>>> nothing is discarded after module load. Though, I can be wrong. Could
>>>> you point me to the exact place?
>>> If __initdata is not discarded after module load then we should do it.
>>> There is no reason to waste __initdata RAM when the module is loaded.
>> Down at the bottom of sys_init_module we have:
>>
>> /* Drop initial reference. */
>> module_put(mod);
>> unwind_remove_table(mod->unwind_info, 1);
>>
>> module_free(mod, mod->module_init);
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> mod->module_init =3D NULL;
>> mod->init_size =3D 0;
>> mod->init_text_size =3D 0;
>> mutex_unlock(&module_mutex);
>>
>> return 0;
>>
>> Which frees the memory for the .init sections.
> =
> Thanks for clarifying this Eric - should have looked myself..
clear :) I was wrong... Thank you for pointing this out.
will you mind against this?
-------------- next part --------------
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 5dd6d90..d136707 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -119,10 +119,14 @@ static inline struct net *maybe_get_net(struct net *n=
et)
#ifdef CONFIG_NET_NS
#define __net_init
#define __net_exit
-#define __net_initdata
#else
#define __net_init __init
#define __net_exit __exit_refok
+#endif
+
+#if defined(CONFIG_NET_NS) || defined(MODULE)
+#define __net_initdata
+#else
#define __net_initdata __initdata
#endif
=20
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