Messages in this thread Patch in this message | | | From | Rusty Russell <> | Subject | [PATCH 1/2] modules: Fix module waiting for dependent modules' init. | Date | Tue, 4 Mar 2008 23:21:01 +1100 |
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Commit c9a3ba55 (module: wait for dependent modules doing init.) didn't quite work because the waiter holds the module lock, meaning that the state of the module it's waiting for cannot change.
Fortunately, it's fairly simple to update the state outside the lock and do the wakeup.
Thanks to Jan Glauber <jang@linux.vnet.ibm.com> for tracking this down and testing (qdio and qeth).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- kernel/module.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff -r 1198dd206438 kernel/module.c --- a/kernel/module.c Tue Mar 04 11:18:59 2008 +1100 +++ b/kernel/module.c Tue Mar 04 13:23:22 2008 +1100 @@ -2172,9 +2172,11 @@ sys_init_module(void __user *umod, return ret; } - /* Now it's a first class citizen! */ + /* Now it's a first class citizen! Wake up anyone waiting for it. */ + mod->state = MODULE_STATE_LIVE; + wake_up(&module_wq); + mutex_lock(&module_mutex); - mod->state = MODULE_STATE_LIVE; /* Drop initial reference. */ module_put(mod); unwind_remove_table(mod->unwind_info, 1); @@ -2183,7 +2185,6 @@ sys_init_module(void __user *umod, mod->init_size = 0; mod->init_text_size = 0; mutex_unlock(&module_mutex); - wake_up(&module_wq); return 0; }
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