1nulldev(9F)              Kernel Functions for Drivers              nulldev(9F)
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NAME

6       nulldev - zero return function
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SYNOPSIS

9       #include <sys/conf.h>
10       #include <sys/ddi.h>
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14       int nulldev();
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INTERFACE LEVEL

18       Architecture independent level 1 (DDI/DKI).
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DESCRIPTION

21       nulldev()  returns  0. It is intended to be used in the cb_ops(9S) data
22       structure of a device driver for device entry points that do nothing.
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RETURN VALUES

25       nulldev() returns a 0.
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CONTEXT

28       nulldev() can be called from any context.
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SEE ALSO

31       nodev(9F), cb_ops(9S)
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34       Writing Device Drivers
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38SunOS 5.11                        11 Apr 1991                      nulldev(9F)