Hi,
I am writing a driver.
I need to make my functions re-entrant, how do I go about writing my
functions to make them so ?
I will have a hash function there, which maintains a list of
structures, like the list_head structure(a standard eature of linux
kernel) is there any such standard thing given even for hash tables ?
Also, though my system is not SMP, but still if I want to use spinlocks,
whats the starting point to read and know about them. A user space
process writes the value of a variable to the driver, and the driver has
to check this value before doing anything, so I believe this is right
place for a spinlock right ?, I dont want one part of the driver to read
this variable while it is being updated. Or, do I not need a spin lock
because everything would be sequential ? I am not very clear about this.
Actually my driver would have a char device driver portion and
netfilter hook functions, a user level process would write to the char
device, and the netfilter hook functions wld read this variable to find
whats to be done when they catch packets. So in this scenario would spin
locks be needed ?
thanks
Amit
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