Quoting r. Sean Hefty <[EMAIL PROTECTED]>:
> Subject: Re: Re: RFC: revert module ref counting patches
>
> Michael S. Tsirkin wrote:
> >BTW, how about the trick of exporting
> >module_mutex_lock/module_mutex_unlock?
> >Its a really simple approach - do you think this will be acceptable?
>
> Who exports these calls, and who calls them?
The idea is to add this to kernel/module.c:
void module_mutex_lock(void)
{
down(&module_mutex);
}
void module_mutex_unlock(void)
{
up(&module_mutex);
}
EXPORT_SYMBOL_GPL(module_mutex_lock);
EXPORT_SYMBOL_GPL(module_mutex_unlock);
----------------------
And now ib_sa can just
module_mutex_lock()
query->callback(..)
module_mutex_unlock()
to prevent modules from unloading while callback is in progress.
Same for other modules that use callbacks without registration, like ib_addr.
--
MST
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