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fix: using joysticks in 32 bit applications on 64 bit systems

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From: Linux Kernel Mailing List <linux-kernel@...>
To: <git-commits-head@...>
Subject: fix: using joysticks in 32 bit applications on 64 bit systems
Date: Sunday, January 6, 2008 - 6:59 pm

Gitweb:     http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3fee37...
Commit:     3fee37c1e2579ed3d6090f690e5fd8cf7fa3bb44
Parent:     7b3d9545f9ac8b31528dd2d6d8ec8d19922917b8
Author:     Akos Maroy <darkeye@tyrell.hu>
AuthorDate: Sun Jan 6 11:15:55 2008 +0100
Committer:  Linus Torvalds <torvalds@woody.linux-foundation.org>
CommitDate: Sun Jan 6 10:26:06 2008 -0800

    fix: using joysticks in 32 bit applications on 64 bit systems
    
    unfortunately 32 bit apps don't see the joysticks on a 64 bit system.
    this prevents one playing X-Plane (http://www.x-plane.com/) or other
    32-bit games with joysticks.
    
    this is a known issue, and already raised several times:
    
     http://readlist.com/lists/vger.kernel.org/linux-kernel/28/144411.html
    
     http://www.brettcsmith.org/wiki/wiki.cgi?action=browse&diff=1&id=OzyComputer/Joystick
    
    unfortunately this is still not fixed in the mainline kernel.
    
    it would be nice to have this fixed, so that people can play these games
    without having to patch their kernel.
    
    the following patch solves the problem on 2.6.22.
    
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Acked-by: Christoph Hellwig <hch@infradead.org>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/compat_ioctl.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index e8b7c3a..da8cb3b 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -10,6 +10,8 @@
  * ioctls.
  */
 
+#include <linux/joystick.h>
+
 #include <linux/types.h>
 #include <linux/compat.h>
 #include <linux/kernel.h>
@@ -2642,6 +2644,12 @@ COMPATIBLE_IOCTL(VIDEO_SET_ATTRIBUTES)
 COMPATIBLE_IOCTL(VIDEO_GET_SIZE)
 COMPATIBLE_IOCTL(VIDEO_GET_FRAME_RATE)
 
+/* joystick */
+COMPATIBLE_IOCTL(JSIOCGVERSION)
+COMPATIBLE_IOCTL(JSIOCGAXES)
+COMPATIBLE_IOCTL(JSIOCGBUTTONS)
+COMPATIBLE_IOCTL(JSIOCGNAME(0))
+
 /* now things that need handlers */
 HANDLE_IOCTL(MEMREADOOB32, mtd_rw_oob)
 HANDLE_IOCTL(MEMWRITEOOB32, mtd_rw_oob)
-
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