Removing a sysfs attrinute file while user space is accessing it

Hello,

What happens if the kernel tries to remove a sysfs attribute that is
currently in use by the user space (i.e. a user spacecode is, say
executing the corresponding show()/store() method of that sysfs
attribute)?

I have some confidence that the call shall sleep untill the user space
process is done with the read / write to the sysfs attribute. Is my
understanding correct?

If so, can some one point me to the supporting code (e.g. which locks
/ mutexes etc) provide this behaviour?

Thanks,

Rajat
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