x86: get rid of pt_regs argument in sigreturn variants

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
index 31f61f9..93e142a 100644
--- a/arch/x86/include/asm/sys_ia32.h
+++ b/arch/x86/include/asm/sys_ia32.h
@@ -69,8 +69,8 @@
 
 /* ia32/ia32_signal.c */
 asmlinkage long sys32_sigsuspend(int, int, old_sigset_t);
-asmlinkage long sys32_sigreturn(struct pt_regs *);
-asmlinkage long sys32_rt_sigreturn(struct pt_regs *);
+asmlinkage long sys32_sigreturn(void);
+asmlinkage long sys32_rt_sigreturn(void);
 
 /* ia32/ipc32.c */
 asmlinkage long sys32_ipc(u32, int, int, int, compat_uptr_t, u32);