[PATCH] Fix POSIX compliance: Make blkcnt_t and blksize_t signed on alpha

[Florian Weimer]

* Osama Abdelkader:

> POSIX requires that blkcnt_t and blksize_t are signed integer types.
> On alpha, these were incorrectly defined as unsigned types (__U32_TYPE).
> This change makes them signed (__SLONGWORD_TYPE) to match:
> - POSIX requirements
> - All other architectures in glibc
> - Similar types on alpha (off_t, clock_t, time_t)
>
> Fixes #33355
>
> Suggested-by: Collin Funk <collin.funk@gmail.com>
> Signed-off-by: Osama Abdelkader <osama.abdelkader@gmail.com>
> ---
>  sysdeps/unix/sysv/linux/alpha/bits/typesizes.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/sysdeps/unix/sysv/linux/alpha/bits/typesizes.h b/sysdeps/unix/sysv/linux/alpha/bits/typesizes.h
> index 8cc4491c0b..2682dfc83f 100644
> --- a/sysdeps/unix/sysv/linux/alpha/bits/typesizes.h
> +++ b/sysdeps/unix/sysv/linux/alpha/bits/typesizes.h
> @@ -38,7 +38,7 @@
>  #define __PID_T_TYPE		__S32_TYPE
>  #define __RLIM_T_TYPE		__ULONGWORD_TYPE
>  #define __RLIM64_T_TYPE		__U64_TYPE
> -#define	__BLKCNT_T_TYPE		__U32_TYPE
> +#define	__BLKCNT_T_TYPE		__SLONGWORD_TYPE
>  #define	__BLKCNT64_T_TYPE	__U64_TYPE
>  #define	__FSBLKCNT_T_TYPE	__S32_TYPE
>  #define	__FSBLKCNT64_T_TYPE	__S64_TYPE
> @@ -54,7 +54,7 @@
>  #define __KEY_T_TYPE		__S32_TYPE
>  #define __CLOCKID_T_TYPE	__S32_TYPE
>  #define __TIMER_T_TYPE		void *
> -#define __BLKSIZE_T_TYPE	__U32_TYPE
> +#define __BLKSIZE_T_TYPE	__SLONGWORD_TYPE
>  #define __FSID_T_TYPE		struct { int __val[2]; }
>  #define __SSIZE_T_TYPE		__SWORD_TYPE
>  #define __SYSCALL_SLONG_TYPE	__SLONGWORD_TYPE

Isn't __SLONGWORD_TYPE 64 bit?  So this is a fairly significant ABI
change.

Switching to a 32-bit signed type would halve maximum file size,
though.