xtensa: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 5aab1ac..23cc6ae 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -16,6 +16,7 @@
select ARCH_WANT_OPTIONAL_GPIOLIB
select CLONE_BACKWARDS
select IRQ_DOMAIN
+ select GENERIC_SIGALTSTACK
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
primarily for embedded systems. These processors are both
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index 08a23dd..3673ff1 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -12,7 +12,6 @@
asmlinkage long xtensa_ptrace(long, long, long, long);
asmlinkage long xtensa_sigreturn(struct pt_regs*);
asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
-asmlinkage long xtensa_sigaltstack(struct pt_regs *regs);
asmlinkage long xtensa_shmat(int, char __user *, int);
asmlinkage long xtensa_fadvise64_64(int, int,
unsigned long long, unsigned long long);
diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h
index 5162418..19fac3f 100644
--- a/arch/xtensa/include/uapi/asm/unistd.h
+++ b/arch/xtensa/include/uapi/asm/unistd.h
@@ -483,7 +483,7 @@
#define __NR_restart_syscall 223
__SYSCALL(223, sys_restart_syscall, 0)
#define __NR_sigaltstack 224
-__SYSCALL(224, xtensa_sigaltstack, 2)
+__SYSCALL(224, sys_sigaltstack, 2)
#define __NR_rt_sigreturn 225
__SYSCALL(225, xtensa_rt_sigreturn, 1)
#define __NR_rt_sigaction 226
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index de34d6b..d7590dd 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -265,7 +265,7 @@
ret = regs->areg[2];
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->areg[1]) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return ret;
@@ -368,11 +368,7 @@
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(regs->areg[1]),
- &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->areg[1]);
err |= setup_sigcontext(frame, regs);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
@@ -424,16 +420,6 @@
return -EFAULT;
}
-asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
- stack_t __user *uoss,
- long a2, long a3, long a4, long a5,
- struct pt_regs *regs)
-{
- return do_sigaltstack(uss, uoss, regs->areg[1]);
-}
-
-
-
/*
* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by