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staging: comedi: amplc_pci224: Replace NULLFUNC

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The source code defines a macro NULLFUNC

  #define NULLFUNC 0

and uses it as a generic null function pointer constant.  This is
superfluous.  Just use NULL instead.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2012-06-08 10:39:42 +01:00 • committed by Greg Kroah-Hartman
parent 83afda9d44
commit cbdfaffc46
1 changed files with 1 additions and 4 deletions
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5
drivers/staging/comedi/drivers/amplc_pci224.c
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@ -265,9 +265,6 @@ Caveats:
/* Combine old and new bits. */ /* Combine old and new bits. */
#define COMBINE(old, new, mask) (((old) & ~(mask)) | ((new) & (mask))) #define COMBINE(old, new, mask) (((old) & ~(mask)) | ((new) & (mask)))
/* A generic null function pointer value. */
#define NULLFUNC 0
/* Current CPU. XXX should this be hard_smp_processor_id()? */ /* Current CPU. XXX should this be hard_smp_processor_id()? */
#define THISCPU smp_processor_id() #define THISCPU smp_processor_id()
@ -703,7 +700,7 @@ pci224_ao_inttrig_start(struct comedi_device *dev, struct comedi_subdevice *s,
if (trignum != 0) if (trignum != 0)
return -EINVAL; return -EINVAL;
s->async->inttrig = NULLFUNC; s->async->inttrig = NULL;
pci224_ao_start(dev, s); pci224_ao_start(dev, s);
return 1; return 1;