Author: jhb
Date: Wed Jan 21 18:35:48 2009
New Revision: 187554
URL: http://svn.freebsd.org/changeset/base/187554
Log:
MFC: Reorder modules during initialization to ensure that MOD_QUIESCE
and MOD_UNLOAD events are posted to kernel modules in the reverse order
of MOD_LOAD events.
Modified:
stable/7/sys/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
stable/7/sys/dev/cxgb/ (props changed)
stable/7/sys/kern/kern_module.c
Modified: stable/7/sys/kern/kern_module.c
==============================================================================
--- stable/7/sys/kern/kern_module.c Wed Jan 21 18:32:43 2009
(r187553)
+++ stable/7/sys/kern/kern_module.c Wed Jan 21 18:35:48 2009
(r187554)
@@ -130,6 +130,21 @@ module_register_init(const void *arg)
printf("module_register_init: MOD_LOAD (%s, %p, %p) error"
" %d\n", data->name, (void *)data->evhand, data->priv,
error);
+ } else {
+ MOD_XLOCK;
+ if (mod->file) {
+ /*
+ * Once a module is succesfully loaded, move
+ * it to the head of the module list for this
+ * linker file. This resorts the list so that
+ * when the kernel linker iterates over the
+ * modules to unload them, it will unload them
+ * in the reverse order they were loaded.
+ */
+ TAILQ_REMOVE(&mod->file->modules, mod, flink);
+ TAILQ_INSERT_HEAD(&mod->file->modules, mod, flink);
+ }
+ MOD_XUNLOCK;
}
mtx_unlock(&Giant);
}
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