tile: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
index 2e4cc69..6228be7 100644
--- a/arch/tile/kernel/compat_signal.c
+++ b/arch/tile/kernel/compat_signal.c
@@ -41,12 +41,6 @@
sigset_t sa_mask __packed;
};
-struct compat_sigaltstack {
- compat_uptr_t ss_sp;
- int ss_flags;
- compat_size_t ss_size;
-};
-
struct compat_ucontext {
compat_ulong_t uc_flags;
compat_uptr_t uc_link;
@@ -196,40 +190,6 @@
return err;
}
-long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
- struct compat_sigaltstack __user *uoss_ptr)
-{
- stack_t uss, uoss;
- int ret;
- mm_segment_t seg;
-
- if (uss_ptr) {
- u32 ptr;
-
- memset(&uss, 0, sizeof(stack_t));
- if (!access_ok(VERIFY_READ, uss_ptr, sizeof(*uss_ptr)) ||
- __get_user(ptr, &uss_ptr->ss_sp) ||
- __get_user(uss.ss_flags, &uss_ptr->ss_flags) ||
- __get_user(uss.ss_size, &uss_ptr->ss_size))
- return -EFAULT;
- uss.ss_sp = compat_ptr(ptr);
- }
- seg = get_fs();
- set_fs(KERNEL_DS);
- ret = do_sigaltstack(uss_ptr ? (stack_t __user __force *)&uss : NULL,
- (stack_t __user __force *)&uoss,
- (unsigned long)compat_ptr(current_pt_regs()->sp));
- set_fs(seg);
- if (ret >= 0 && uoss_ptr) {
- if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(*uoss_ptr)) ||
- __put_user(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp) ||
- __put_user(uoss.ss_flags, &uoss_ptr->ss_flags) ||
- __put_user(uoss.ss_size, &uoss_ptr->ss_size))
- ret = -EFAULT;
- }
- return ret;
-}
-
/* The assembly shim for this function arranges to ignore the return value. */
long compat_sys_rt_sigreturn(void)
{
@@ -248,7 +208,7 @@
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
- if (compat_sys_sigaltstack(&frame->uc.uc_stack, NULL) == -EFAULT)
+ if (compat_restore_altstack(&frame->uc.uc_stack))
goto badframe;
return 0;
@@ -325,11 +285,7 @@
err |= __clear_user(&frame->save_area, sizeof(frame->save_area));
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(0, &frame->uc.uc_link);
- err |= __put_user(ptr_to_compat((void *)(current->sas_ss_sp)),
- &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(regs->sp),
- &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->sp);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)