1 files changed, 2 insertions, 132 deletions

diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 593fcc9253fc..3e71194c1902 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -157,122 +157,6 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
         return err;
 }
 
-asmlinkage long
-sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
-                 struct old_sigaction32 __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        unsigned long sa_handler, sa_restorer;
-        int ret;
-
-        if (act) {
-                compat_old_sigset_t mask;
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-                    __get_user(sa_handler, &act->sa_handler) ||
-                    __get_user(sa_restorer, &act->sa_restorer) ||
-                    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-                    __get_user(mask, &act->sa_mask))
-                        return -EFAULT;
-                new_ka.sa.sa_handler = (__sighandler_t) sa_handler;
-                new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer;
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-        if (!ret && oact) {
-                sa_handler = (unsigned long) old_ka.sa.sa_handler;
-                sa_restorer = (unsigned long) old_ka.sa.sa_restorer;
-                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-                    __put_user(sa_handler, &oact->sa_handler) ||
-                    __put_user(sa_restorer, &oact->sa_restorer) ||
-                    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-                    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-                        return -EFAULT;
-        }
-
-        return ret;
-}
-
-asmlinkage long
-sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
-           struct sigaction32 __user *oact,  size_t sigsetsize)
-{
-        struct k_sigaction new_ka, old_ka;
-        unsigned long sa_handler;
-        int ret;
-        compat_sigset_t set32;
-
-        /* XXX: Don't preclude handling different sized sigset_t's.  */
-        if (sigsetsize != sizeof(compat_sigset_t))
-                return -EINVAL;
-
-        if (act) {
-                ret = get_user(sa_handler, &act->sa_handler);
-                ret |= __copy_from_user(&set32, &act->sa_mask,
-                                        sizeof(compat_sigset_t));
-                new_ka.sa.sa_mask.sig[0] =
-                        set32.sig[0] | (((long)set32.sig[1]) << 32);
-                ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
-                
-                if (ret)
-                        return -EFAULT;
-                new_ka.sa.sa_handler = (__sighandler_t) sa_handler;
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-        if (!ret && oact) {
-                set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
-                set32.sig[0] = old_ka.sa.sa_mask.sig[0];
-                ret = put_user((unsigned long)old_ka.sa.sa_handler, &oact->sa_handler);
-                ret |= __copy_to_user(&oact->sa_mask, &set32,
-                                      sizeof(compat_sigset_t));
-                ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
-        }
-
-        return ret;
-}
-
-asmlinkage long
-sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss)
-{
-        struct pt_regs *regs = task_pt_regs(current);
-        stack_t kss, koss;
-        unsigned long ss_sp;
-        int ret, err = 0;
-        mm_segment_t old_fs = get_fs();
-
-        if (uss) {
-                if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
-                        return -EFAULT;
-                err |= __get_user(ss_sp, &uss->ss_sp);
-                err |= __get_user(kss.ss_size, &uss->ss_size);
-                err |= __get_user(kss.ss_flags, &uss->ss_flags);
-                if (err)
-                        return -EFAULT;
-                kss.ss_sp = (void __user *) ss_sp;
-        }
-
-        set_fs (KERNEL_DS);
-        ret = do_sigaltstack((stack_t __force __user *) (uss ? &kss : NULL),
-                             (stack_t __force __user *) (uoss ? &koss : NULL),
-                             regs->gprs[15]);
-        set_fs (old_fs);
-
-        if (!ret && uoss) {
-                if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
-                        return -EFAULT;
-                ss_sp = (unsigned long) koss.ss_sp;
-                err |= __put_user(ss_sp, &uoss->ss_sp);
-                err |= __put_user(koss.ss_size, &uoss->ss_size);
-                err |= __put_user(koss.ss_flags, &uoss->ss_flags);
-                if (err)
-                        return -EFAULT;
-        }
-        return ret;
-}
-
 static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
 {
         _s390_regs_common32 regs32;
@@ -380,10 +264,6 @@ asmlinkage long sys32_rt_sigreturn(void)
         struct pt_regs *regs = task_pt_regs(current);
         rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
         sigset_t set;
-        stack_t st;
-        __u32 ss_sp;
-        int err;
-        mm_segment_t old_fs = get_fs();
 
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
@@ -394,15 +274,8 @@ asmlinkage long sys32_rt_sigreturn(void)
                 goto badframe;
         if (restore_sigregs_gprs_high(regs, frame->gprs_high))
                 goto badframe;
-        err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
-        st.ss_sp = compat_ptr(ss_sp);
-        err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size);
-        err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags);
-        if (err)
+        if (compat_restore_altstack(&frame->uc.uc_stack))
                 goto badframe; 
-        set_fs (KERNEL_DS);
-        do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]);
-        set_fs (old_fs);
         return regs->gprs[2];
 badframe:
         force_sig(SIGSEGV, current);
@@ -530,10 +403,7 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
         /* Create the ucontext.  */
         err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags);
         err |= __put_user(0, &frame->uc.uc_link);
-        err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-        err |= __put_user(sas_ss_flags(regs->gprs[15]),
-                          &frame->uc.uc_stack.ss_flags);
-        err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+        err |= __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]);
         err |= save_sigregs32(regs, &frame->uc.uc_mcontext);
         err |= save_sigregs_gprs_high(regs, frame->gprs_high);
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));