avr32: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index 2ae6591b..e888b72 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -17,6 +17,7 @@
select GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select GENERIC_SIGALTSTACK
help
AVR32 is a high-performance 32-bit RISC microprocessor core,
designed for cost-sensitive embedded applications, with particular
diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c
index 5e01c3a..b80c0b3 100644
--- a/arch/avr32/kernel/signal.c
+++ b/arch/avr32/kernel/signal.c
@@ -21,12 +21,6 @@
#include <asm/ucontext.h>
#include <asm/syscalls.h>
-asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
- struct pt_regs *regs)
-{
- return do_sigaltstack(uss, uoss, regs->sp);
-}
-
struct rt_sigframe
{
struct siginfo info;
@@ -91,7 +85,7 @@
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
pr_debug("Context restored: pc = %08lx, lr = %08lx, sp = %08lx\n",
@@ -175,12 +169,7 @@
/* Set up the ucontext */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
- err |= __put_user((void __user *)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 |= __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));
diff --git a/arch/avr32/kernel/syscall-stubs.S b/arch/avr32/kernel/syscall-stubs.S
index 275aab9..b5fc927 100644
--- a/arch/avr32/kernel/syscall-stubs.S
+++ b/arch/avr32/kernel/syscall-stubs.S
@@ -20,12 +20,6 @@
mov r10, sp
rjmp sys_rt_sigsuspend
- .global __sys_sigaltstack
- .type __sys_sigaltstack,@function
-__sys_sigaltstack:
- mov r10, sp
- rjmp sys_sigaltstack
-
.global __sys_rt_sigreturn
.type __sys_rt_sigreturn,@function
__sys_rt_sigreturn:
diff --git a/arch/avr32/kernel/syscall_table.S b/arch/avr32/kernel/syscall_table.S
index f27bb87..017a904 100644
--- a/arch/avr32/kernel/syscall_table.S
+++ b/arch/avr32/kernel/syscall_table.S
@@ -115,7 +115,7 @@
.long sys_statfs
.long sys_fstatfs /* 100 */
.long sys_vhangup
- .long __sys_sigaltstack
+ .long sys_sigaltstack
.long sys_syslog
.long sys_setitimer
.long sys_getitimer /* 105 */