module: Add MODULE_STATE_LIVE notify
PATCH 6/7 module: Add MODULE_STATE_LIVE notify
Add a module notifier call which notifies that the state of a module changes from MODULE_STATE_COMING to MODULE_STATE_LIVE.
Signed-off-by Masami Hiramatsu <[email protected]>
--- kernel/module.c | 2 ++ 1 file changed, 2 insertions(+)
Steven, Ananth told me that this patch might also help to solve cmpxchg problem.
kernel/module.c +2 -0
@@ -2346,6 +2346,8 @@ sys_init_module(void __user *umod,/* Now it's a first class citizen! Wake up anyone waiting for it. */ mod->state =MODULE_STATE_LIVE ;wake_up (&module_wq); +blocking_notifier_call_chain (&module_notify_list, +MODULE_STATE_LIVE , mod);mutex_lock (&module_mutex);/* Drop initial reference. */
Signature · 7 lines
Masami Hiramatsu Software Engineer Hitachi Computer Products (America) Inc. Software Solutions Division e-mail: [email protected]
Quoted 10 lines · Masami Hiramatsu
Add a module notifier call which notifies that the state of a module changes from
MODULE_STATE_COMINGtoMODULE_STATE_LIVE.Signed-off-by Masami Hiramatsu <[email protected]>--- kernel/module.c | 2 ++ 1 file changed, 2 insertions(+)Steven, Ananth told me that this patch might also help to solve cmpxchg problem.
I'm assuming you are talking about the infamous e1000e ftrace cmpxchg corruption bug?
In anycase, ftrace has already solved those issues, and does not use cmpxchg anymore.
Thanks anyway,
-- Steve
Quoted 26 lines
Index:
2.6.28-rc4/kernel/module.c
===================================================================kernel/module.c +2
-0@@ -2346,6 +2346,8 @@ sys_init_module(void __user *umod,/* Now it's a first class citizen! Wake up anyone waiting for it. */ mod->state =MODULE_STATE_LIVE ;wake_up (&module_wq); +blocking_notifier_call_chain (&module_notify_list, +MODULE_STATE_LIVE , mod);mutex_lock (&module_mutex);/* Drop initial reference. */ Signature · 8 lines
-- Masami Hiramatsu Software Engineer Hitachi Computer Products (America) Inc. Software Solutions Division e-mail: [email protected]