Hi,
Is there some way to tell whether a function is always called with locks or whether it is allowed to sleep or not. Furthermore, is there some source to check whether a function will sleep or not? (A list of sleeping functions, etc.?)
I am wondering whether vmalloc and copy_to_user in particular can sleep (I'm pretty sure they both can), which would mean that they could not be called from the read and write function of a block device because the device spinlock is acquired before those functions are called.
Thanks, Can Sar
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