fs: compat: Remove warning from COMPATIBLE_IOCTL

cmd in COMPATIBLE_IOCTL is always a u32, so cast it so there isn't a warning about an overflow in XFORM. From: Mark Charlebois <[email protected]> Signed-off-by: Mark Charlebois <[email protected]> Signed-off-by: Behan Webster <[email protected]> Signed-off-by: Matthias Kaehlcke <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Al Viro <[email protected]>
mrcsosa · Apr 29, 2017 · 9280cdd · 9280cdd
1 parent 0b33540
commit 9280cdd
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
@@ -833,7 +833,7 @@ static int compat_ioctl_preallocate(struct file *file,
  */
 #define XFORM(i) (((i) ^ ((i) << 27) ^ ((i) << 17)) & 0xffffffff)
 
-#define COMPATIBLE_IOCTL(cmd) XFORM(cmd),
+#define COMPATIBLE_IOCTL(cmd) XFORM((u32)cmd),
 /* ioctl should not be warned about even if it's not implemented.
    Valid reasons to use this:
    - It is implemented with ->compat_ioctl on some device, but programs