Re: [PATCH resend] uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name

Greg KH
2018-08-29T02:42:29Z

On Tue, Aug 28, 2018 at 04:34:04PM -0700, Randy Dunlap wrote:
> From: Randy Dunlap <rdunlap@infradead.org>
>
> Since this header is in "include/uapi/linux/", apparently people
> want to use it in userspace programs -- even in C++ ones.
> However, the header uses a C++ reserved keyword ("private"),
> so change that to "dh_private" instead to allow the header file
> to be used in C++ userspace.
>
> Fixes https://bugzilla.kernel.org/show_bug.cgi?id=191051
> Fixes: ddbb41148724 ("KEYS: Add KEYCTL_DH_COMPUTE command")
>
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: David Howells <dhowells@redhat.com>
> Cc: James Morris <jmorris@namei.org>
> Cc: "Serge E. Hallyn" <serge@hallyn.com>
> Cc: keyrings@vger.kernel.org
> Cc: linux-security-module@vger.kernel.org
> Cc: Mat Martineau <mathew.j.martineau@linux.intel.com>
> Cc: stable@vger.kernel.org
> ---
> include/uapi/linux/keyctl.h | 2 +-
> security/keys/dh.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> --- lnx-416.orig/include/uapi/linux/keyctl.h
> +++ lnx-416/include/uapi/linux/keyctl.h
> @@ -65,7 +65,7 @@
>
> /* keyctl structures */
> struct keyctl_dh_params {
> - __s32 private;
> + __s32 dh_private;

Ick ick ick, why not just put the C "namespace" on all uapi files if you
are including them from c++ code? I'm sure this isn't the only problem
that has this problem, right?

This is valid C, no need to start worrying about C++ reserved names.

thanks,

greg "'struct class' is your friend" k-h