h8300: switch to generic sigaltstack

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

2 files changed, 3 insertions, 13 deletions

diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 2d2efb653ee0..667999e96f63 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -9,6 +9,7 @@ config H8300
         select GENERIC_IRQ_SHOW
         select GENERIC_CPU_DEVICES
         select MODULES_USE_ELF_RELA
+        select GENERIC_SIGALTSTACK
 
 config SYMBOL_PREFIX
         string
diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index 0e81b96c642f..2d37418c04fb 100644
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -89,13 +89,6 @@ sys_sigaction(int sig, const struct old_sigaction *act,
         return ret;
 }
 
-asmlinkage int
-sys_sigaltstack(const stack_t *uss, stack_t *uoss)
-{
-        return do_sigaltstack(uss, uoss, rdusp());
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  *
@@ -212,7 +205,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
         if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &er0))
                 goto badframe;
 
-        if (do_sigaltstack(&frame->uc.uc_stack, NULL, usp) == -EFAULT)
+        if (restore_altstack(&frame->uc.uc_stack))
                 goto badframe;
 
         return er0;
@@ -358,11 +351,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
         /* Create the ucontext.  */
         err |= __put_user(0, &frame->uc.uc_flags);
         err |= __put_user(0, &frame->uc.uc_link);
-        err |= __put_user((void *)current->sas_ss_sp,
-                          &frame->uc.uc_stack.ss_sp);
-        err |= __put_user(sas_ss_flags(rdusp()),
-                          &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, rdusp());
         err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
         err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
         if (err)