linux-kernel - [PATCH] staging: comedi: comedi

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Message-Id: <1432315951-24731-1-git-send-email-abbotti@mev.co.uk>
Date:	Fri, 22 May 2015 18:32:31 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	<driverdev-devel@...uxdriverproject.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ian Abbott <abbotti@....co.uk>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] staging: comedi: comedi_8254.h: make self-reliant

The Comedi "comedi_8254.h" header file is included by various Comedi
drivers with timer/counters based on the 8254 chip.  The drivers do not
compile cleanly if this header file is included first.  It uses pointers
to the `struct comedi_device`, `struct comedi_subdevice`, and `struct
comedi_insn` structures in various function prototypes, so declare those
as incomplete types.  It use the `bool` type, so include
<linux/types.h>.  It also uses the `__iomem` tag, but that seems to be
taken care of indirectly by including <linux/types.h>.

Signed-off-by: Ian Abbott <abbotti@....co.uk>
---
 drivers/staging/comedi/drivers/comedi_8254.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/staging/comedi/drivers/comedi_8254.h b/drivers/staging/comedi/drivers/comedi_8254.h
index d89f6d9..f4610ea 100644
--- a/drivers/staging/comedi/drivers/comedi_8254.h
+++ b/drivers/staging/comedi/drivers/comedi_8254.h
@@ -20,6 +20,12 @@
 #ifndef _COMEDI_8254_H
 #define _COMEDI_8254_H
 
+#include <linux/types.h>
+
+struct comedi_device;
+struct comedi_insn;
+struct comedi_subdevice;
+
 /*
  * Common oscillator base values in nanoseconds
  */
-- 
2.1.4

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