[PATCH] fix: macros to detect existance of unlocked_ioctl and compat_ioctl

[Michael S. Tsirkin]

Hi!
I just noticed that my original patch says "ioctl_compat" all over the place
while the actual field name in -mm2 is "compat_ioctl". Doh.
Here's a replacement patch.
PS. Please dont flame me, I do not maintain out of kernel modules, myself :)

To make life bearable for out-of kernel modules, the following patch
adds 2 macros so that existance of unlocked_ioctl and compat_ioctl
can be easily detected.
 
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxxxxxx>

diff -puN include/linux/fs.h~ioctl-rework include/linux/fs.h
--- 25/include/linux/fs.h~ioctl-rework	Thu Dec 16 15:48:31 2004
+++ 25-akpm/include/linux/fs.h	Thu Dec 16 15:48:31 2004
@@ -907,6 +907,12 @@ typedef struct {
 
 typedef int (*read_actor_t)(read_descriptor_t *, struct page *, unsigned long, unsigned long);
 
+/* These macros are for out of kernel modules to test that
+ * the kernel supports the unlocked_ioctl and compat_ioctl
+ * fields in struct file_operations. */
+#define HAVE_COMPAT_IOCTL 1
+#define HAVE_UNLOCKED_IOCTL 1
+
 /*
  * NOTE:
  * read, write, poll, fsync, readv, writev can be called
-
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