* sysdeps/alpha/bits/atomic.h (__arch_compare_and_exchange_xxx_8_int):

    * sysdeps/alpha/bits/atomic.h (__arch_compare_and_exchange_xxx_8_int):
        Cast old up to uint64_t before back down to inner width.
        (__arch_compare_and_exchange_xxx_16_int): Likewise.
        (__arch_compare_and_exchange_xxx_32_int): Likewise.
        (__arch_compare_and_exchange_xxx_64_int): Likewise.
        (__arch_compare_and_exchange_val_8_int): Cast result to
        the type of the memory.
        (__arch_compare_and_exchange_val_16_int): Likewise.
        (__arch_compare_and_exchange_val_32_int): Likewise.
        (__arch_compare_and_exchange_val_64_int): Likewise.
        (atomic_compare_and_exchange_bool_acq): Use __atomic_bool_bysize.
        (atomic_compare_and_exchange_bool_rel): Likewise.

        * sysdeps/unix/alpha/sysdep.h: Select inline_syscall_r0_asm
        based on HAVE___THREAD instead of USE_TLS.

        * sysdeps/unix/sysv/linux/alpha/adjtime.c (ADJTIMEX32): New.
        (__adjtimex_tv64): Use it.

        * sysdeps/unix/sysv/linux/alpha/semctl.c (__new_semctl): Cast
        to void* rather than directly to the compatibility structure type.
        * sysdeps/unix/sysv/linux/alpha/shmctl.c (__new_shmctl): Likewise.

        * sysdeps/unix/sysv/linux/alpha/sigaction.c (struct kernel_sigaction):
        Forward declare.