frv: switch to generic sigaltstack

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

diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 9d262645f6675275c9e2c7adca9a66b114d03b88..8aaf1a174270998480cfc4182a686dbcc7d3b7da 100644 (file)
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -12,6 +12,7 @@ config FRV
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
        select GENERIC_CPU_DEVICES
        select ARCH_WANT_IPC_PARSE_VERSION
+       select GENERIC_SIGALTSTACK
 
 config ZONE_DMA
        bool

diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
index 535810a3217a25bf64e3f5d53059f8a5ff1a7ea4..445156d2d30b15ec6a048a025a9800be57d4019e 100644 (file)
--- a/arch/frv/kernel/signal.c
+++ b/arch/frv/kernel/signal.c
@@ -74,13 +74,6 @@ asmlinkage int sys_sigaction(int sig,
        return ret;
 }
 
-asmlinkage
-int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-       return do_sigaltstack(uss, uoss, __frame->sp);
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -173,7 +166,7 @@ asmlinkage int sys_rt_sigreturn(void)
        if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8))
                goto badframe;
 
-       if (do_sigaltstack(&frame->uc.uc_stack, NULL, __frame->sp) == -EFAULT)
+       if (restore_altstack(&frame->uc.uc_stack))
                goto badframe;
 
        return gr8;
@@ -345,9 +338,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
        /* Create the ucontext.  */
        if (__put_user(0, &frame->uc.uc_flags) ||
            __put_user(NULL, &frame->uc.uc_link) ||
-           __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) ||
-           __put_user(sas_ss_flags(__frame->sp), &frame->uc.uc_stack.ss_flags) ||
-           __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size))
+           __save_altstack(&frame->uc.uc_stack, __frame->sp))
                goto give_sigsegv;
 
        if (setup_sigcontext(&frame->uc.uc_mcontext, set->sig[0]))