alpha: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 7e3710c0cce5a4c2ef51b8a889a061979a0b9b24..9d5904cc7712fbdd64ce3d682617d5f31be6b268 100644 (file)
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -22,6 +22,7 @@ config ALPHA
        select GENERIC_STRNLEN_USER
        select HAVE_MOD_ARCH_SPECIFIC
        select MODULES_USE_ELF_RELA
+       select GENERIC_SIGALTSTACK
        help
          The Alpha is a 64-bit general-purpose processor designed and
          marketed by the Digital Equipment Corporation of blessed memory,

diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 336393c9c11f507bb14897de9c3ab7c74fd8a0c3..02d02c047f17e13d8c7714e0cd4d328ea2a2ce11 100644 (file)
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -122,12 +122,6 @@ SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
        return sigsuspend(&blocked);
 }
 
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-       return do_sigaltstack(uss, uoss, rdusp());
-}
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -418,9 +412,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
        err |= __put_user(0, &frame->uc.uc_flags);
        err |= __put_user(0, &frame->uc.uc_link);
        err |= __put_user(set->sig[0], &frame->uc.uc_osf_sigmask);
-       err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-       err |= __put_user(sas_ss_flags(oldsp), &frame->uc.uc_stack.ss_flags);
-       err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+       err |= __save_altstack(&frame->uc.uc_stack, oldsp);
        err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, 
                                set->sig[0], oldsp);
        err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));