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 <charlebm@gmail.com> Signed-off-by: Mark Charlebois <charlebm@gmail.com> Signed-off-by: Behan Webster <behanw@converseincode.com> Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -833,7 +833,7 @@ static int compat_ioctl_preallocate(struct file *file,
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*/
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#define XFORM(i) (((i) ^ ((i) << 27) ^ ((i) << 17)) & 0xffffffff)
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#define COMPATIBLE_IOCTL(cmd) XFORM(cmd),
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#define COMPATIBLE_IOCTL(cmd) XFORM((u32)cmd),
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/* ioctl should not be warned about even if it's not implemented.
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Valid reasons to use this:
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- It is implemented with ->compat_ioctl on some device, but programs
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