Staging: comedi: __user markup on comedi_fops.c

Hm, what a mess.  I tried to properly mark up the __user pointers,
but for some of these structures, we use them both in the kernel,
and across the user/kernel boundry, which isn't ok.  So we end
up generating a few new sparse warnings in places we were not before,
but the large majority of things are now properly tagged in the fops
file.

The whole ioctl interface needs to be carefully looked at in the future.

Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/comedi.h

@@ -321,7 +321,7 @@
 	struct comedi_insn {
 		unsigned int insn;
 		unsigned int n;
-		unsigned int *data;
+		unsigned int __user *data;
 		unsigned int subdev;
 		unsigned int chanspec;
 		unsigned int unused[3];
@@ -329,7 +329,7 @@
 
 	struct comedi_insnlist {
 		unsigned int n_insns;
-		struct comedi_insn *insns;
+		struct comedi_insn __user *insns;
 	};
 
 	struct comedi_cmd {
@@ -351,7 +351,7 @@
 		unsigned int stop_src;
 		unsigned int stop_arg;
 
-		unsigned int *chanlist;	/* channel/range list */
+		unsigned int __user *chanlist;	/* channel/range list */
 		unsigned int chanlist_len;
 
 		short *data;	/* data list, size depends on subd flags */
@@ -360,9 +360,9 @@
 
 	struct comedi_chaninfo {
 		unsigned int subdev;
-		unsigned int *maxdata_list;
-		unsigned int *flaglist;
-		unsigned int *rangelist;
+		unsigned int __user *maxdata_list;
+		unsigned int __user *flaglist;
+		unsigned int __user *rangelist;
 		unsigned int unused[4];
 	};