m32r: switch to generic sigaltstack

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

2 files changed, 3 insertions, 14 deletions

diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index f807721e19a5..1f550d4dd5d0 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -15,6 +15,7 @@ config M32R
         select GENERIC_ATOMIC64
         select ARCH_USES_GETTIMEOFFSET
         select MODULES_USE_ELF_RELA
+        select GENERIC_SIGALTSTACK
 
 config SBUS
         bool
diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c
index 6e3c26a1607c..d503568cb753 100644
--- a/arch/m32r/kernel/signal.c
+++ b/arch/m32r/kernel/signal.c
@@ -27,15 +27,6 @@
 
 #define DEBUG_SIG 0
 
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-                unsigned long r2, unsigned long r3, unsigned long r4,
-                unsigned long r5, unsigned long r6, struct pt_regs *regs)
-{
-        return do_sigaltstack(uss, uoss, regs->spu);
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -113,7 +104,7 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1,
         if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result))
                 goto badframe;
 
-        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->spu) == -EFAULT)
+        if (restore_altstack(&frame->uc.uc_stack))
                 goto badframe;
 
         return result;
@@ -213,10 +204,7 @@ 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(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-        err |= __put_user(sas_ss_flags(regs->spu),
-                          &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, regs->spu);
         err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
         if (err)