[PATCH] s390: fix SIGNAL_FRAMESIZE macro

[Dmitry V. Levin]

On Wed, Mar 13, 2019 at 11:32:12PM +0100, Tuan Hoang wrote:
> Since __SIGNAL_FRAMESIZE is in private name space, it is better not to
> use it directly. This macro has been stable on s390/s390x so it is safe
> to use the integer value.

I thought we can rely on the macro defined in
arch/s390/include/uapi/asm/sigcontext.h but if you say we should rather
not use it, I don't mind using the integer value instead.

> 
> Signed-off-by: Tuan Hoang <tmhoang at linux.ibm.com>
> ---
>  linux/s390/arch_sigreturn.c  | 2 +-
>  linux/s390/rt_sigframe.h     | 8 +++++++-
>  linux/s390x/arch_sigreturn.c | 4 +---
>  3 files changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/linux/s390/arch_sigreturn.c b/linux/s390/arch_sigreturn.c
> index 1d0f0e00..4a9ca8ec 100644
> --- a/linux/s390/arch_sigreturn.c
> +++ b/linux/s390/arch_sigreturn.c
> @@ -6,7 +6,7 @@
>   */
>  
>  #ifndef SIGNAL_FRAMESIZE
> -# define SIGNAL_FRAMESIZE __SIGNAL_FRAMESIZE
> +# define SIGNAL_FRAMESIZE 96
>  #endif
>  #ifndef PTR_TYPE
>  # define PTR_TYPE unsigned long
> diff --git a/linux/s390/rt_sigframe.h b/linux/s390/rt_sigframe.h
> index e11573a4..101ca79c 100644
> --- a/linux/s390/rt_sigframe.h
> +++ b/linux/s390/rt_sigframe.h
> @@ -10,8 +10,14 @@
>  
>  # include <signal.h>
>  
> +#if defined __s390__
> +# define __signal_framesize 96
> +#elif defined __s390x__
> +# define __signal_framesize 160
> +#endif

If we are getting picky about name space issues, let's avoid introduction
of new macros starting with "__".  We could use a more regular name
for the new macro, e.g. SIGNAL_FRAMESIZE.


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