hexagon: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 0744f7d..3e6e27c 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -31,6 +31,7 @@
select GENERIC_CLOCKEVENTS
select GENERIC_CLOCKEVENTS_BROADCAST
select MODULES_USE_ELF_RELA
+ select GENERIC_SIGALTSTACK
---help---
Qualcomm Hexagon is a processor architecture designed for high
performance and low power across a wide variety of applications.
diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c
index fe0d137..46ebd479 100644
--- a/arch/hexagon/kernel/signal.c
+++ b/arch/hexagon/kernel/signal.c
@@ -247,12 +247,6 @@
/*
* Architecture-specific wrappers for signal-related system calls
*/
-asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
- struct pt_regs *regs = current_pt_regs();
-
- return do_sigaltstack(uss, uoss, regs->r29);
-}
asmlinkage int sys_rt_sigreturn(void)
{
@@ -288,14 +282,7 @@
*/
regs->syscall_nr = __NR_rt_sigreturn;
- /*
- * If we were meticulous, we'd only call this if we knew that
- * we were actually going to use an alternate stack, and we'd
- * consider any error to be fatal. What we do here, in common
- * with many other architectures, is call it blindly and only
- * consider the -EFAULT return case to be proof of a problem.
- */
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, pt_psp(regs)) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return 0;