Author: attilio
Date: Fri Nov 19 19:43:56 2010
New Revision: 215544
URL: http://svn.freebsd.org/changeset/base/215544
Log:
Scan the list in reverse order for the shutdown handlers of loaded modules.
This way, when there is a dependency between two modules, the handler of the
latter probed runs first.
This is a similar approach as the modules are unloaded in the same
linkerfile.
Sponsored by: Sandvine Incorporated
Submitted by: Nima Misaghian <nmisaghian at sandvine dot com>
MFC after: 1 week
Modified:
head/sys/kern/kern_module.c
Modified: head/sys/kern/kern_module.c
==============================================================================
--- head/sys/kern/kern_module.c Fri Nov 19 18:59:35 2010 (r215543)
+++ head/sys/kern/kern_module.c Fri Nov 19 19:43:56 2010 (r215544)
@@ -46,7 +46,7 @@ __FBSDID("$FreeBSD$");
static MALLOC_DEFINE(M_MODULE, "module", "module data structures");
-typedef TAILQ_HEAD(, module) modulelist_t;
+typedef TAILQ_HEAD(modulelst, module) modulelist_t;
struct module {
TAILQ_ENTRY(module) link; /* chain together all modules */
TAILQ_ENTRY(module) flink; /* all modules in a file */
@@ -101,7 +101,7 @@ module_shutdown(void *arg1, int arg2)
return;
mtx_lock(&Giant);
MOD_SLOCK;
- TAILQ_FOREACH(mod, &modules, link)
+ TAILQ_FOREACH_REVERSE(mod, &modules, modulelst, link)
MOD_EVENT(mod, MOD_SHUTDOWN);
MOD_SUNLOCK;
mtx_unlock(&Giant);
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