[Fault-injection-developer] semaphore usage in xxx_store()

[Zhuang, L. <lou...@in...>]

Dear Rusty,
	I noticed you always down an semaphore in attribute store function.
But I wonder if it is too paranoia... The only race condition I can image is
somebody write the sysfs file with unloading module... But kernel/module.c
should be the right place to care about it. If it is broken by that
condition, we should challenge another Rusty. ;->  Could you give me some
light about it? 

Yours truly,
Louis Zhuang
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