Please CC me on any replies, I'm not subscribed.

Even since a previous patch:

Fix race between CONFIG_DEBUG_SLABALLOC and modules
Sun, 27 Jun 2004 17:55:19 +0000 (17:55 +0000)
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/old-2.6-bkcvs.git;a=commit;h=92b3db26d31cf21b70e3c1eadc56c179506d8fbe

The function symbol_put_addr() will deadlock the kernel.
symbol_put_addr() acquires the modlist_lock spinlock, then calls
kernel_text_address() and module_text_address() while it still holds
the lock.  That patch changed those two functions so they also try to
acquire the spinlock, which of course locks the kernel.

If you look at the original thread:  http://lkml.org/lkml/2004/6/23/20
The first patch corrected symbol_put_addr() to use the new
"double-underscore" functions that don't try to acquire the lock, but
the final patch missed symbol_put_addr().

Here is a patch which fixes this.  The locking inside
symbol_put_addr() is removed.  I changed symbol_put_addr() to call
core_kernel_text() instead of kernel_text_address(), the latter
includes an additional check if the addr is inside a module.  Since we
will call module_text_address() to get the module, this extra check
isn't needed.