Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

Pull signal handling cleanups from Al Viro:
 "This is the first pile; another one will come a bit later and will
  contain SYSCALL_DEFINE-related patches.

   - a bunch of signal-related syscalls (both native and compat)
     unified.

   - a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
     (fixing several potential problems with missing argument
     validation, while we are at it)

   - a lot of now-pointless wrappers killed

   - a couple of architectures (cris and hexagon) forgot to save
     altstack settings into sigframe, even though they used the
     (uninitialized) values in sigreturn; fixed.

   - microblaze fixes for delivery of multiple signals arriving at once

   - saner set of helpers for signal delivery introduced, several
     architectures switched to using those."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
  x86: convert to ksignal
  sparc: convert to ksignal
  arm: switch to struct ksignal * passing
  alpha: pass k_sigaction and siginfo_t using ksignal pointer
  burying unused conditionals
  make do_sigaltstack() static
  arm64: switch to generic old sigaction() (compat-only)
  arm64: switch to generic compat rt_sigaction()
  arm64: switch compat to generic old sigsuspend
  arm64: switch to generic compat rt_sigqueueinfo()
  arm64: switch to generic compat rt_sigpending()
  arm64: switch to generic compat rt_sigprocmask()
  arm64: switch to generic sigaltstack
  sparc: switch to generic old sigsuspend
  sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
  sparc: kill sign-extending wrappers for native syscalls
  kill sparc32_open()
  sparc: switch to use of generic old sigaction
  sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
  mips: switch to generic sys_fork() and sys_clone()
  ...

24 files changed, 142 insertions, 547 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4ebc7a6e6724..6a9383370311 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -115,8 +115,10 @@ config X86
 	select MODULES_USE_ELF_REL if X86_32
 	select MODULES_USE_ELF_RELA if X86_64
 	select CLONE_BACKWARDS if X86_32
-	select GENERIC_SIGALTSTACK
 	select ARCH_USE_BUILTIN_BSWAP
+	select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION
+	select OLD_SIGACTION if X86_32
+	select COMPAT_OLD_SIGACTION if IA32_EMULATION
 
 config INSTRUCTION_DECODER
 	def_bool y
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index a1daf4a65009..cf1a471a18a2 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -129,13 +129,6 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
 	return err;
 }
 
-asmlinkage long sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -215,8 +208,9 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
 	return err;
 }
 
-asmlinkage long sys32_sigreturn(struct pt_regs *regs)
+asmlinkage long sys32_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(regs->sp-8);
 	sigset_t set;
 	unsigned int ax;
@@ -241,8 +235,9 @@ badframe:
 	return 0;
 }
 
-asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
+asmlinkage long sys32_rt_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	struct rt_sigframe_ia32 __user *frame;
 	sigset_t set;
 	unsigned int ax;
@@ -314,7 +309,7 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
 /*
  * Determine which stack to use..
  */
-static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
 				 size_t frame_size,
 				 void __user **fpstate)
 {
@@ -324,16 +319,13 @@ static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 	sp = regs->sp;
 
 	/* This is the X/Open sanctioned signal stack switching.  */
-	if (ka->sa.sa_flags & SA_ONSTACK) {
-		if (sas_ss_flags(sp) == 0)
-			sp = current->sas_ss_sp + current->sas_ss_size;
-	}
-
+	if (ksig->ka.sa.sa_flags & SA_ONSTACK)
+		sp = sigsp(sp, ksig);
 	/* This is the legacy signal stack switching. */
 	else if ((regs->ss & 0xffff) != __USER32_DS &&
-		!(ka->sa.sa_flags & SA_RESTORER) &&
-		 ka->sa.sa_restorer)
-		sp = (unsigned long) ka->sa.sa_restorer;
+		!(ksig->ka.sa.sa_flags & SA_RESTORER) &&
+		 ksig->ka.sa.sa_restorer)
+		sp = (unsigned long) ksig->ka.sa.sa_restorer;
 
 	if (used_math()) {
 		unsigned long fx_aligned, math_size;
@@ -352,7 +344,7 @@ static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 	return (void __user *) sp;
 }
 
-int ia32_setup_frame(int sig, struct k_sigaction *ka,
+int ia32_setup_frame(int sig, struct ksignal *ksig,
 		     compat_sigset_t *set, struct pt_regs *regs)
 {
 	struct sigframe_ia32 __user *frame;
@@ -371,7 +363,7 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 		0x80cd,		/* int $0x80 */
 	};
 
-	frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
+	frame = get_sigframe(ksig, regs, sizeof(*frame), &fpstate);
 
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		return -EFAULT;
@@ -388,8 +380,8 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 			return -EFAULT;
 	}
 
-	if (ka->sa.sa_flags & SA_RESTORER) {
-		restorer = ka->sa.sa_restorer;
+	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+		restorer = ksig->ka.sa.sa_restorer;
 	} else {
 		/* Return stub is in 32bit vsyscall page */
 		if (current->mm->context.vdso)
@@ -414,7 +406,7 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 
 	/* Set up registers for signal handler */
 	regs->sp = (unsigned long) frame;
-	regs->ip = (unsigned long) ka->sa.sa_handler;
+	regs->ip = (unsigned long) ksig->ka.sa.sa_handler;
 
 	/* Make -mregparm=3 work */
 	regs->ax = sig;
@@ -430,7 +422,7 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 	return 0;
 }
 
-int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
 			compat_sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe_ia32 __user *frame;
@@ -451,7 +443,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		0,
 	};
 
-	frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
+	frame = get_sigframe(ksig, regs, sizeof(*frame), &fpstate);
 
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		return -EFAULT;
@@ -469,8 +461,8 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		put_user_ex(0, &frame->uc.uc_link);
 		err |= __compat_save_altstack(&frame->uc.uc_stack, regs->sp);
 
-		if (ka->sa.sa_flags & SA_RESTORER)
-			restorer = ka->sa.sa_restorer;
+		if (ksig->ka.sa.sa_flags & SA_RESTORER)
+			restorer = ksig->ka.sa.sa_restorer;
 		else
 			restorer = VDSO32_SYMBOL(current->mm->context.vdso,
 						 rt_sigreturn);
@@ -483,7 +475,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		put_user_ex(*((u64 *)&code), (u64 __user *)frame->retcode);
 	} put_user_catch(err);
 
-	err |= copy_siginfo_to_user32(&frame->info, info);
+	err |= copy_siginfo_to_user32(&frame->info, &ksig->info);
 	err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
 				     regs, set->sig[0]);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
@@ -493,7 +485,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	/* Set up registers for signal handler */
 	regs->sp = (unsigned long) frame;
-	regs->ip = (unsigned long) ka->sa.sa_handler;
+	regs->ip = (unsigned long) ksig->ka.sa.sa_handler;
 
 	/* Make -mregparm=3 work */
 	regs->ax = sig;
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 142c4ceff112..474dc1b59f72 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -456,18 +456,16 @@ ia32_badsys:
 	ALIGN
 GLOBAL(\label)
 	leaq \func(%rip),%rax
-	leaq -ARGOFFSET+8(%rsp),\arg	/* 8 for return address */
 	jmp  ia32_ptregs_common	
 	.endm
 
 	CFI_STARTPROC32
 
-	PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
-	PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
-	PTREGSCALL stub32_execve, compat_sys_execve, %rcx
-	PTREGSCALL stub32_fork, sys_fork, %rdi
-	PTREGSCALL stub32_vfork, sys_vfork, %rdi
-	PTREGSCALL stub32_iopl, sys_iopl, %rsi
+	PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn
+	PTREGSCALL stub32_sigreturn, sys32_sigreturn
+	PTREGSCALL stub32_execve, compat_sys_execve
+	PTREGSCALL stub32_fork, sys_fork
+	PTREGSCALL stub32_vfork, sys_vfork
 
 	ALIGN
 GLOBAL(stub32_clone)
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index d0b689ba7be2..592f5a9a9c0e 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -172,183 +172,12 @@ asmlinkage long sys32_mprotect(unsigned long start, size_t len,
 	return sys_mprotect(start, len, prot);
 }
 
-asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
-				   struct sigaction32 __user *oact,
-				   unsigned int sigsetsize)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-	compat_sigset_t set32;
-
-	/* XXX: Don't preclude handling different sized sigset_t's.  */
-	if (sigsetsize != sizeof(compat_sigset_t))
-		return -EINVAL;
-
-	if (act) {
-		compat_uptr_t handler, restorer;
-
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(restorer, &act->sa_restorer) ||
-		    __copy_from_user(&set32, &act->sa_mask,
-				     sizeof(compat_sigset_t)))
-			return -EFAULT;
-		new_ka.sa.sa_handler = compat_ptr(handler);
-		new_ka.sa.sa_restorer = compat_ptr(restorer);
-
-		/*
-		 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
-		 * than _NSIG_WORDS << 1
-		 */
-		switch (_NSIG_WORDS) {
-		case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
-				| (((long)set32.sig[7]) << 32);
-		case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
-				| (((long)set32.sig[5]) << 32);
-		case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
-				| (((long)set32.sig[3]) << 32);
-		case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
-				| (((long)set32.sig[1]) << 32);
-		}
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		/*
-		 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
-		 * than _NSIG_WORDS << 1
-		 */
-		switch (_NSIG_WORDS) {
-		case 4:
-			set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
-			set32.sig[6] = old_ka.sa.sa_mask.sig[3];
-		case 3:
-			set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
-			set32.sig[4] = old_ka.sa.sa_mask.sig[2];
-		case 2:
-			set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
-			set32.sig[2] = old_ka.sa.sa_mask.sig[1];
-		case 1:
-			set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
-			set32.sig[0] = old_ka.sa.sa_mask.sig[0];
-		}
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(ptr_to_compat(old_ka.sa.sa_handler),
-			       &oact->sa_handler) ||
-		    __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
-			       &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __copy_to_user(&oact->sa_mask, &set32,
-				   sizeof(compat_sigset_t)))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
-				struct old_sigaction32 __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		compat_old_sigset_t mask;
-		compat_uptr_t handler, restorer;
-
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(restorer, &act->sa_restorer) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-
-		new_ka.sa.sa_handler = compat_ptr(handler);
-		new_ka.sa.sa_restorer = compat_ptr(restorer);
-
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(ptr_to_compat(old_ka.sa.sa_handler),
-			       &oact->sa_handler) ||
-		    __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
-			       &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
 asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
 			      int options)
 {
 	return compat_sys_wait4(pid, stat_addr, options, NULL);
 }
 
-/* 32-bit timeval and related flotsam.  */
-
-asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
-				    struct compat_timespec __user *interval)
-{
-	struct timespec t;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	set_fs(KERNEL_DS);
-	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
-	set_fs(old_fs);
-	if (put_compat_timespec(&t, interval))
-		return -EFAULT;
-	return ret;
-}
-
-asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
-				    compat_size_t sigsetsize)
-{
-	sigset_t s;
-	compat_sigset_t s32;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	set_fs(KERNEL_DS);
-	ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
-	set_fs(old_fs);
-	if (!ret) {
-		switch (_NSIG_WORDS) {
-		case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
-		case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
-		case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
-		case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
-		}
-		if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
-			return -EFAULT;
-	}
-	return ret;
-}
-
-asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
-				      compat_siginfo_t __user *uinfo)
-{
-	siginfo_t info;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	if (copy_siginfo_from_user32(&info, uinfo))
-		return -EFAULT;
-	set_fs(KERNEL_DS);
-	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
-	set_fs(old_fs);
-	return ret;
-}
-
 /* warning: next two assume little endian */
 asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
 			    u32 poslo, u32 poshi)
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index 41ab26ea6564..e25cc33ec54d 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -26,9 +26,10 @@
 #ifdef CONFIG_X86_64
 # include <asm/sigcontext32.h>
 # include <asm/user32.h>
-int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+struct ksignal;
+int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
 			compat_sigset_t *set, struct pt_regs *regs);
-int ia32_setup_frame(int sig, struct k_sigaction *ka,
+int ia32_setup_frame(int sig, struct ksignal *ksig,
 		     compat_sigset_t *set, struct pt_regs *regs);
 #else
 # define user_i387_ia32_struct	user_i387_struct
diff --git a/arch/x86/include/asm/ia32.h b/arch/x86/include/asm/ia32.h
index 4c6da2e4bb1d..d0e8e0141041 100644
--- a/arch/x86/include/asm/ia32.h
+++ b/arch/x86/include/asm/ia32.h
@@ -13,21 +13,6 @@
 #include <asm/sigcontext32.h>
 
 /* signal.h */
-struct sigaction32 {
-	unsigned int  sa_handler;	/* Really a pointer, but need to deal
-					   with 32 bits */
-	unsigned int sa_flags;
-	unsigned int sa_restorer;	/* Another 32 bit pointer */
-	compat_sigset_t sa_mask;	/* A 32 bit mask */
-};
-
-struct old_sigaction32 {
-	unsigned int  sa_handler;	/* Really a pointer, but need to deal
-					   with 32 bits */
-	compat_old_sigset_t sa_mask;	/* A 32 bit mask */
-	unsigned int sa_flags;
-	unsigned int sa_restorer;	/* Another 32 bit pointer */
-};
 
 struct ucontext_ia32 {
 	unsigned int	  uc_flags;
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
index 216bf364a7e7..35e67a457182 100644
--- a/arch/x86/include/asm/signal.h
+++ b/arch/x86/include/asm/signal.h
@@ -31,27 +31,9 @@ typedef sigset_t compat_sigset_t;
 #include <uapi/asm/signal.h>
 #ifndef __ASSEMBLY__
 extern void do_notify_resume(struct pt_regs *, void *, __u32);
-#ifdef __i386__
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
-struct sigaction {
-	__sighandler_t sa_handler;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-	sigset_t sa_mask;		/* mask last for extensibility */
-};
-
-struct k_sigaction {
-	struct sigaction sa;
-};
 
-#else /* __i386__ */
-#endif /* !__i386__ */
+#define __ARCH_HAS_SA_RESTORER
+
 #include <asm/sigcontext.h>
 
 #ifdef __i386__
diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
index 31f61f96e0fb..0218d917f509 100644
--- a/arch/x86/include/asm/sys_ia32.h
+++ b/arch/x86/include/asm/sys_ia32.h
@@ -32,22 +32,11 @@ struct mmap_arg_struct32;
 asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *);
 asmlinkage long sys32_mprotect(unsigned long, size_t, unsigned long);
 
-struct sigaction32;
-struct old_sigaction32;
-asmlinkage long sys32_rt_sigaction(int, struct sigaction32 __user *,
-				   struct sigaction32 __user *, unsigned int);
-asmlinkage long sys32_sigaction(int, struct old_sigaction32 __user *,
-				struct old_sigaction32 __user *);
 asmlinkage long sys32_alarm(unsigned int);
 
 asmlinkage long sys32_waitpid(compat_pid_t, unsigned int __user *, int);
 asmlinkage long sys32_sysfs(int, u32, u32);
 
-asmlinkage long sys32_sched_rr_get_interval(compat_pid_t,
-					    struct compat_timespec __user *);
-asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *, compat_size_t);
-asmlinkage long sys32_rt_sigqueueinfo(int, int, compat_siginfo_t __user *);
-
 asmlinkage long sys32_pread(unsigned int, char __user *, u32, u32, u32);
 asmlinkage long sys32_pwrite(unsigned int, const char __user *, u32, u32, u32);
 
@@ -68,9 +57,8 @@ asmlinkage long sys32_fallocate(int, int, unsigned,
 				unsigned, unsigned, unsigned);
 
 /* 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);
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 58b7e3eac0ae..6cf0a9cc60cd 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -18,13 +18,13 @@
 /* Common in X86_32 and X86_64 */
 /* kernel/ioport.c */
 asmlinkage long sys_ioperm(unsigned long, unsigned long, int);
-long sys_iopl(unsigned int, struct pt_regs *);
+asmlinkage long sys_iopl(unsigned int);
 
 /* kernel/ldt.c */
 asmlinkage int sys_modify_ldt(int, void __user *, unsigned long);
 
 /* kernel/signal.c */
-long sys_rt_sigreturn(struct pt_regs *);
+long sys_rt_sigreturn(void);
 
 /* kernel/tls.c */
 asmlinkage int sys_set_thread_area(struct user_desc __user *);
@@ -34,14 +34,11 @@ asmlinkage int sys_get_thread_area(struct user_desc __user *);
 #ifdef CONFIG_X86_32
 
 /* kernel/signal.c */
-asmlinkage int sys_sigsuspend(int, int, old_sigset_t);
-asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
-			     struct old_sigaction __user *);
-unsigned long sys_sigreturn(struct pt_regs *);
+unsigned long sys_sigreturn(void);
 
 /* kernel/vm86_32.c */
-int sys_vm86old(struct vm86_struct __user *, struct pt_regs *);
-int sys_vm86(unsigned long, unsigned long, struct pt_regs *);
+int sys_vm86old(struct vm86_struct __user *);
+int sys_vm86(unsigned long, unsigned long);
 
 #else /* CONFIG_X86_32 */
 
diff --git a/arch/x86/include/asm/unistd.h b/arch/x86/include/asm/unistd.h
index a0790e07ba65..3d5df1c4447f 100644
--- a/arch/x86/include/asm/unistd.h
+++ b/arch/x86/include/asm/unistd.h
@@ -38,8 +38,6 @@
 # define __ARCH_WANT_SYS_OLD_GETRLIMIT
 # define __ARCH_WANT_SYS_OLD_UNAME
 # define __ARCH_WANT_SYS_PAUSE
-# define __ARCH_WANT_SYS_RT_SIGACTION
-# define __ARCH_WANT_SYS_RT_SIGSUSPEND
 # define __ARCH_WANT_SYS_SGETMASK
 # define __ARCH_WANT_SYS_SIGNAL
 # define __ARCH_WANT_SYS_SIGPENDING
diff --git a/arch/x86/include/uapi/asm/signal.h b/arch/x86/include/uapi/asm/signal.h
index aa7d6ae39e0e..8264f47cf53e 100644
--- a/arch/x86/include/uapi/asm/signal.h
+++ b/arch/x86/include/uapi/asm/signal.h
@@ -95,9 +95,9 @@ typedef unsigned long sigset_t;
 #ifndef __ASSEMBLY__
 
 
-#ifdef __i386__
 # ifndef __KERNEL__
 /* Here we must cater to libcs that poke about in kernel headers.  */
+#ifdef __i386__
 
 struct sigaction {
 	union {
@@ -112,7 +112,6 @@ struct sigaction {
 #define sa_handler	_u._sa_handler
 #define sa_sigaction	_u._sa_sigaction
 
-# endif /* ! __KERNEL__ */
 #else /* __i386__ */
 
 struct sigaction {
@@ -122,11 +121,8 @@ struct sigaction {
 	sigset_t sa_mask;		/* mask last for extensibility */
 };
 
-struct k_sigaction {
-	struct sigaction sa;
-};
-
 #endif /* !__i386__ */
+# endif /* ! __KERNEL__ */
 
 typedef struct sigaltstack {
 	void __user *ss_sp;
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 8831176aa5ef..8f3e2dec1df3 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -699,51 +699,6 @@ END(syscall_badsys)
  */
 	.popsection
 
-/*
- * System calls that need a pt_regs pointer.
- */
-#define PTREGSCALL0(name) \
-ENTRY(ptregs_##name) ;  \
-	leal 4(%esp),%eax; \
-	jmp sys_##name; \
-ENDPROC(ptregs_##name)
-
-#define PTREGSCALL1(name) \
-ENTRY(ptregs_##name) ; \
-	leal 4(%esp),%edx; \
-	movl (PT_EBX+4)(%esp),%eax; \
-	jmp sys_##name; \
-ENDPROC(ptregs_##name)
-
-#define PTREGSCALL2(name) \
-ENTRY(ptregs_##name) ; \
-	leal 4(%esp),%ecx; \
-	movl (PT_ECX+4)(%esp),%edx; \
-	movl (PT_EBX+4)(%esp),%eax; \
-	jmp sys_##name; \
-ENDPROC(ptregs_##name)
-
-#define PTREGSCALL3(name) \
-ENTRY(ptregs_##name) ; \
-	CFI_STARTPROC; \
-	leal 4(%esp),%eax; \
-	pushl_cfi %eax; \
-	movl PT_EDX(%eax),%ecx; \
-	movl PT_ECX(%eax),%edx; \
-	movl PT_EBX(%eax),%eax; \
-	call sys_##name; \
-	addl $4,%esp; \
-	CFI_ADJUST_CFA_OFFSET -4; \
-	ret; \
-	CFI_ENDPROC; \
-ENDPROC(ptregs_##name)
-
-PTREGSCALL1(iopl)
-PTREGSCALL0(sigreturn)
-PTREGSCALL0(rt_sigreturn)
-PTREGSCALL2(vm86)
-PTREGSCALL1(vm86old)
-
 .macro FIXUP_ESPFIX_STACK
 /*
  * Switch back for ESPFIX stack to the normal zerobased stack
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 048f2240f8e6..c1d01e6ca790 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -828,23 +828,6 @@ int_restore_rest:
 	CFI_ENDPROC
 END(system_call)
 
-/*
- * Certain special system calls that need to save a complete full stack frame.
- */
-	.macro PTREGSCALL label,func,arg
-ENTRY(\label)
-	PARTIAL_FRAME 1 8		/* offset 8: return address */
-	subq $REST_SKIP, %rsp
-	CFI_ADJUST_CFA_OFFSET REST_SKIP
-	call save_rest
-	DEFAULT_FRAME 0 8		/* offset 8: return address */
-	leaq 8(%rsp), \arg	/* pt_regs pointer */
-	call \func
-	jmp ptregscall_common
-	CFI_ENDPROC
-END(\label)
-	.endm
-
 	.macro FORK_LIKE func
 ENTRY(stub_\func)
 	CFI_STARTPROC
@@ -861,10 +844,22 @@ ENTRY(stub_\func)
 END(stub_\func)
 	.endm
 
+	.macro FIXED_FRAME label,func
+ENTRY(\label)
+	CFI_STARTPROC
+	PARTIAL_FRAME 0 8		/* offset 8: return address */
+	FIXUP_TOP_OF_STACK %r11, 8-ARGOFFSET
+	call \func
+	RESTORE_TOP_OF_STACK %r11, 8-ARGOFFSET
+	ret
+	CFI_ENDPROC
+END(\label)
+	.endm
+
 	FORK_LIKE  clone
 	FORK_LIKE  fork
 	FORK_LIKE  vfork
-	PTREGSCALL stub_iopl, sys_iopl, %rsi
+	FIXED_FRAME stub_iopl, sys_iopl
 
 ENTRY(ptregscall_common)
 	DEFAULT_FRAME 1 8	/* offset 8: return address */
@@ -886,7 +881,6 @@ ENTRY(stub_execve)
 	SAVE_REST
 	FIXUP_TOP_OF_STACK %r11
 	call sys_execve
-	RESTORE_TOP_OF_STACK %r11
 	movq %rax,RAX(%rsp)
 	RESTORE_REST
 	jmp int_ret_from_sys_call
@@ -902,7 +896,6 @@ ENTRY(stub_rt_sigreturn)
 	addq $8, %rsp
 	PARTIAL_FRAME 0
 	SAVE_REST
-	movq %rsp,%rdi
 	FIXUP_TOP_OF_STACK %r11
 	call sys_rt_sigreturn
 	movq %rax,RAX(%rsp) # fixme, this could be done at the higher layer
@@ -917,7 +910,6 @@ ENTRY(stub_x32_rt_sigreturn)
 	addq $8, %rsp
 	PARTIAL_FRAME 0
 	SAVE_REST
-	movq %rsp,%rdi
 	FIXUP_TOP_OF_STACK %r11
 	call sys32_x32_rt_sigreturn
 	movq %rax,RAX(%rsp) # fixme, this could be done at the higher layer
diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c
index 8c968974253d..4ddaf66ea35f 100644
--- a/arch/x86/kernel/ioport.c
+++ b/arch/x86/kernel/ioport.c
@@ -93,8 +93,9 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
  * on system-call entry - see also fork() and the signal handling
  * code.
  */
-long sys_iopl(unsigned int level, struct pt_regs *regs)
+SYSCALL_DEFINE1(iopl, unsigned int, level)
 {
+	struct pt_regs *regs = current_pt_regs();
 	unsigned int old = (regs->flags >> 12) & 3;
 	struct thread_struct *t = &current->thread;
 
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index d6bf1f34a6e9..69562992e457 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -278,7 +278,7 @@ static const struct {
 };
 
 static int
-__setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
+__setup_frame(int sig, struct ksignal *ksig, sigset_t *set,
 	      struct pt_regs *regs)
 {
 	struct sigframe __user *frame;
@@ -286,7 +286,7 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
 	int err = 0;
 	void __user *fpstate = NULL;
 
-	frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
+	frame = get_sigframe(&ksig->ka, regs, sizeof(*frame), &fpstate);
 
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		return -EFAULT;
@@ -307,8 +307,8 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
 		restorer = VDSO32_SYMBOL(current->mm->context.vdso, sigreturn);
 	else
 		restorer = &frame->retcode;
-	if (ka->sa.sa_flags & SA_RESTORER)
-		restorer = ka->sa.sa_restorer;
+	if (ksig->ka.sa.sa_flags & SA_RESTORER)
+		restorer = ksig->ka.sa.sa_restorer;
 
 	/* Set up to return from userspace.  */
 	err |= __put_user(restorer, &frame->pretcode);
@@ -327,7 +327,7 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
 
 	/* Set up registers for signal handler */
 	regs->sp = (unsigned long)frame;
-	regs->ip = (unsigned long)ka->sa.sa_handler;
+	regs->ip = (unsigned long)ksig->ka.sa.sa_handler;
 	regs->ax = (unsigned long)sig;
 	regs->dx = 0;
 	regs->cx = 0;
@@ -340,7 +340,7 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
 	return 0;
 }
 
-static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+static int __setup_rt_frame(int sig, struct ksignal *ksig,
 			    sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
@@ -348,7 +348,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	int err = 0;
 	void __user *fpstate = NULL;
 
-	frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
+	frame = get_sigframe(&ksig->ka, regs, sizeof(*frame), &fpstate);
 
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		return -EFAULT;
@@ -368,8 +368,8 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 		/* Set up to return from userspace.  */
 		restorer = VDSO32_SYMBOL(current->mm->context.vdso, rt_sigreturn);
-		if (ka->sa.sa_flags & SA_RESTORER)
-			restorer = ka->sa.sa_restorer;
+		if (ksig->ka.sa.sa_flags & SA_RESTORER)
+			restorer = ksig->ka.sa.sa_restorer;
 		put_user_ex(restorer, &frame->pretcode);
 
 		/*
@@ -382,7 +382,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		put_user_ex(*((u64 *)&rt_retcode), (u64 *)frame->retcode);
 	} put_user_catch(err);
 	
-	err |= copy_siginfo_to_user(&frame->info, info);
+	err |= copy_siginfo_to_user(&frame->info, &ksig->info);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
 				regs, set->sig[0]);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
@@ -392,7 +392,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	/* Set up registers for signal handler */
 	regs->sp = (unsigned long)frame;
-	regs->ip = (unsigned long)ka->sa.sa_handler;
+	regs->ip = (unsigned long)ksig->ka.sa.sa_handler;
 	regs->ax = (unsigned long)sig;
 	regs->dx = (unsigned long)&frame->info;
 	regs->cx = (unsigned long)&frame->uc;
@@ -405,20 +405,20 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	return 0;
 }
 #else /* !CONFIG_X86_32 */
-static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+static int __setup_rt_frame(int sig, struct ksignal *ksig,
 			    sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
 	void __user *fp = NULL;
 	int err = 0;
 
-	frame = get_sigframe(ka, regs, sizeof(struct rt_sigframe), &fp);
+	frame = get_sigframe(&ksig->ka, regs, sizeof(struct rt_sigframe), &fp);
 
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		return -EFAULT;
 
-	if (ka->sa.sa_flags & SA_SIGINFO) {
-		if (copy_siginfo_to_user(&frame->info, info))
+	if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
+		if (copy_siginfo_to_user(&frame->info, &ksig->info))
 			return -EFAULT;
 	}
 
@@ -434,8 +434,8 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		/* Set up to return from userspace.  If provided, use a stub
 		   already in userspace.  */
 		/* x86-64 should always use SA_RESTORER. */
-		if (ka->sa.sa_flags & SA_RESTORER) {
-			put_user_ex(ka->sa.sa_restorer, &frame->pretcode);
+		if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+			put_user_ex(ksig->ka.sa.sa_restorer, &frame->pretcode);
 		} else {
 			/* could use a vstub here */
 			err |= -EFAULT;
@@ -457,7 +457,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	   next argument after the signal number on the stack. */
 	regs->si = (unsigned long)&frame->info;
 	regs->dx = (unsigned long)&frame->uc;
-	regs->ip = (unsigned long) ka->sa.sa_handler;
+	regs->ip = (unsigned long) ksig->ka.sa.sa_handler;
 
 	regs->sp = (unsigned long)frame;
 
@@ -469,8 +469,8 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 }
 #endif /* CONFIG_X86_32 */
 
-static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
-			      siginfo_t *info, compat_sigset_t *set,
+static int x32_setup_rt_frame(struct ksignal *ksig,
+			      compat_sigset_t *set,
 			      struct pt_regs *regs)
 {
 #ifdef CONFIG_X86_X32_ABI
@@ -479,13 +479,13 @@ static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
 	int err = 0;
 	void __user *fpstate = NULL;
 
-	frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
+	frame = get_sigframe(&ksig->ka, regs, sizeof(*frame), &fpstate);
 
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		return -EFAULT;
 
-	if (ka->sa.sa_flags & SA_SIGINFO) {
-		if (copy_siginfo_to_user32(&frame->info, info))
+	if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
+		if (copy_siginfo_to_user32(&frame->info, &ksig->info))
 			return -EFAULT;
 	}
 
@@ -499,8 +499,8 @@ static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
 		err |= __compat_save_altstack(&frame->uc.uc_stack, regs->sp);
 		put_user_ex(0, &frame->uc.uc__pad0);
 
-		if (ka->sa.sa_flags & SA_RESTORER) {
-			restorer = ka->sa.sa_restorer;
+		if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+			restorer = ksig->ka.sa.sa_restorer;
 		} else {
 			/* could use a vstub here */
 			restorer = NULL;
@@ -518,10 +518,10 @@ static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
 
 	/* Set up registers for signal handler */
 	regs->sp = (unsigned long) frame;
-	regs->ip = (unsigned long) ka->sa.sa_handler;
+	regs->ip = (unsigned long) ksig->ka.sa.sa_handler;
 
 	/* We use the x32 calling convention here... */
-	regs->di = sig;
+	regs->di = ksig->sig;
 	regs->si = (unsigned long) &frame->info;
 	regs->dx = (unsigned long) &frame->uc;
 
@@ -535,70 +535,13 @@ static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
 	return 0;
 }
 
-#ifdef CONFIG_X86_32
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(int history0, int history1, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
-	      struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret = 0;
-
-	if (act) {
-		old_sigset_t mask;
-
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)))
-			return -EFAULT;
-
-		get_user_try {
-			get_user_ex(new_ka.sa.sa_handler, &act->sa_handler);
-			get_user_ex(new_ka.sa.sa_flags, &act->sa_flags);
-			get_user_ex(mask, &act->sa_mask);
-			get_user_ex(new_ka.sa.sa_restorer, &act->sa_restorer);
-		} get_user_catch(ret);
-
-		if (ret)
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
-			return -EFAULT;
-
-		put_user_try {
-			put_user_ex(old_ka.sa.sa_handler, &oact->sa_handler);
-			put_user_ex(old_ka.sa.sa_flags, &oact->sa_flags);
-			put_user_ex(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
-			put_user_ex(old_ka.sa.sa_restorer, &oact->sa_restorer);
-		} put_user_catch(ret);
-
-		if (ret)
-			return -EFAULT;
-	}
-
-	return ret;
-}
-#endif /* CONFIG_X86_32 */
-
 /*
  * Do a signal return; undo the signal stack.
  */
 #ifdef CONFIG_X86_32
-unsigned long sys_sigreturn(struct pt_regs *regs)
+unsigned long sys_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	struct sigframe __user *frame;
 	unsigned long ax;
 	sigset_t set;
@@ -625,8 +568,9 @@ badframe:
 }
 #endif /* CONFIG_X86_32 */
 
-long sys_rt_sigreturn(struct pt_regs *regs)
+long sys_rt_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	struct rt_sigframe __user *frame;
 	unsigned long ax;
 	sigset_t set;
@@ -667,30 +611,29 @@ static int signr_convert(int sig)
 }
 
 static int
-setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
-		struct pt_regs *regs)
+setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs)
 {
-	int usig = signr_convert(sig);
+	int usig = signr_convert(ksig->sig);
 	sigset_t *set = sigmask_to_save();
 	compat_sigset_t *cset = (compat_sigset_t *) set;
 
 	/* Set up the stack frame */
 	if (is_ia32_frame()) {
-		if (ka->sa.sa_flags & SA_SIGINFO)
-			return ia32_setup_rt_frame(usig, ka, info, cset, regs);
+		if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+			return ia32_setup_rt_frame(usig, ksig, cset, regs);
 		else
-			return ia32_setup_frame(usig, ka, cset, regs);
+			return ia32_setup_frame(usig, ksig, cset, regs);
 	} else if (is_x32_frame()) {
-		return x32_setup_rt_frame(usig, ka, info, cset, regs);
+		return x32_setup_rt_frame(ksig, cset, regs);
 	} else {
-		return __setup_rt_frame(sig, ka, info, set, regs);
+		return __setup_rt_frame(ksig->sig, ksig, set, regs);
 	}
 }
 
 static void
-handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
-		struct pt_regs *regs)
+handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 {
+	bool failed;
 	/* Are we from a system call? */
 	if (syscall_get_nr(current, regs) >= 0) {
 		/* If so, check system call restarting.. */
@@ -701,7 +644,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 			break;
 
 		case -ERESTARTSYS:
-			if (!(ka->sa.sa_flags & SA_RESTART)) {
+			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
 				regs->ax = -EINTR;
 				break;
 			}
@@ -721,26 +664,21 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 	    likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
 		regs->flags &= ~X86_EFLAGS_TF;
 
-	if (setup_rt_frame(sig, ka, info, regs) < 0) {
-		force_sigsegv(sig, current);
-		return;
+	failed = (setup_rt_frame(ksig, regs) < 0);
+	if (!failed) {
+		/*
+		 * Clear the direction flag as per the ABI for function entry.
+		 */
+		regs->flags &= ~X86_EFLAGS_DF;
+		/*
+		 * Clear TF when entering the signal handler, but
+		 * notify any tracer that was single-stepping it.
+		 * The tracer may want to single-step inside the
+		 * handler too.
+		 */
+		regs->flags &= ~X86_EFLAGS_TF;
 	}
-
-	/*
-	 * Clear the direction flag as per the ABI for function entry.
-	 */
-	regs->flags &= ~X86_EFLAGS_DF;
-
-	/*
-	 * Clear TF when entering the signal handler, but
-	 * notify any tracer that was single-stepping it.
-	 * The tracer may want to single-step inside the
-	 * handler too.
-	 */
-	regs->flags &= ~X86_EFLAGS_TF;
-
-	signal_delivered(sig, info, ka, regs,
-			 test_thread_flag(TIF_SINGLESTEP));
+	signal_setup_done(failed, ksig, test_thread_flag(TIF_SINGLESTEP));
 }
 
 #ifdef CONFIG_X86_32
@@ -757,14 +695,11 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
  */
 static void do_signal(struct pt_regs *regs)
 {
-	struct k_sigaction ka;
-	siginfo_t info;
-	int signr;
+	struct ksignal ksig;
 
-	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-	if (signr > 0) {
+	if (get_signal(&ksig)) {
 		/* Whee! Actually deliver the signal.  */
-		handle_signal(signr, &info, &ka, regs);
+		handle_signal(&ksig, regs);
 		return;
 	}
 
@@ -843,8 +778,9 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
 }
 
 #ifdef CONFIG_X86_X32_ABI
-asmlinkage long sys32_x32_rt_sigreturn(struct pt_regs *regs)
+asmlinkage long sys32_x32_rt_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	struct rt_sigframe_x32 __user *frame;
 	sigset_t set;
 	unsigned long ax;
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index 1dfe69cc78a8..1cf5766dde16 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -202,7 +202,7 @@ out:
 static int do_vm86_irq_handling(int subfunction, int irqnumber);
 static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk);
 
-int sys_vm86old(struct vm86_struct __user *v86, struct pt_regs *regs)
+int sys_vm86old(struct vm86_struct __user *v86)
 {
 	struct kernel_vm86_struct info; /* declare this _on top_,
 					 * this avoids wasting of stack space.
@@ -222,7 +222,7 @@ int sys_vm86old(struct vm86_struct __user *v86, struct pt_regs *regs)
 	if (tmp)
 		goto out;
 	memset(&info.vm86plus, 0, (int)&info.regs32 - (int)&info.vm86plus);
-	info.regs32 = regs;
+	info.regs32 = current_pt_regs();
 	tsk->thread.vm86_info = v86;
 	do_sys_vm86(&info, tsk);
 	ret = 0;	/* we never return here */
@@ -231,7 +231,7 @@ out:
 }
 
 
-int sys_vm86(unsigned long cmd, unsigned long arg, struct pt_regs *regs)
+int sys_vm86(unsigned long cmd, unsigned long arg)
 {
 	struct kernel_vm86_struct info; /* declare this _on top_,
 					 * this avoids wasting of stack space.
@@ -272,7 +272,7 @@ int sys_vm86(unsigned long cmd, unsigned long arg, struct pt_regs *regs)
 	ret = -EFAULT;
 	if (tmp)
 		goto out;
-	info.regs32 = regs;
+	info.regs32 = current_pt_regs();
 	info.vm86plus.is_vm86pus = 1;
 	tsk->thread.vm86_info = (struct vm86_struct __user *)v86;
 	do_sys_vm86(&info, tsk);
diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index 28e3fa9056ea..f2fe78ff22cc 100644
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -73,12 +73,12 @@
 64	i386	getppid			sys_getppid
 65	i386	getpgrp			sys_getpgrp
 66	i386	setsid			sys_setsid
-67	i386	sigaction		sys_sigaction			sys32_sigaction
+67	i386	sigaction		sys_sigaction			compat_sys_sigaction
 68	i386	sgetmask		sys_sgetmask
 69	i386	ssetmask		sys_ssetmask
 70	i386	setreuid		sys_setreuid16
 71	i386	setregid		sys_setregid16
-72	i386	sigsuspend		sys_sigsuspend			sys32_sigsuspend
+72	i386	sigsuspend		sys_sigsuspend			sys_sigsuspend
 73	i386	sigpending		sys_sigpending			compat_sys_sigpending
 74	i386	sethostname		sys_sethostname
 75	i386	setrlimit		sys_setrlimit			compat_sys_setrlimit
@@ -116,16 +116,16 @@
 107	i386	lstat			sys_newlstat			compat_sys_newlstat
 108	i386	fstat			sys_newfstat			compat_sys_newfstat
 109	i386	olduname		sys_uname
-110	i386	iopl			ptregs_iopl			stub32_iopl
+110	i386	iopl			sys_iopl
 111	i386	vhangup			sys_vhangup
 112	i386	idle
-113	i386	vm86old			ptregs_vm86old			sys32_vm86_warning
+113	i386	vm86old			sys_vm86old			sys32_vm86_warning
 114	i386	wait4			sys_wait4			compat_sys_wait4
 115	i386	swapoff			sys_swapoff
 116	i386	sysinfo			sys_sysinfo			compat_sys_sysinfo
 117	i386	ipc			sys_ipc				sys32_ipc
 118	i386	fsync			sys_fsync
-119	i386	sigreturn		ptregs_sigreturn		stub32_sigreturn
+119	i386	sigreturn		sys_sigreturn			stub32_sigreturn
 120	i386	clone			sys_clone			stub32_clone
 121	i386	setdomainname		sys_setdomainname
 122	i386	uname			sys_newuname
@@ -167,24 +167,24 @@
 158	i386	sched_yield		sys_sched_yield
 159	i386	sched_get_priority_max	sys_sched_get_priority_max
 160	i386	sched_get_priority_min	sys_sched_get_priority_min
-161	i386	sched_rr_get_interval	sys_sched_rr_get_interval	sys32_sched_rr_get_interval
+161	i386	sched_rr_get_interval	sys_sched_rr_get_interval	compat_sys_sched_rr_get_interval
 162	i386	nanosleep		sys_nanosleep			compat_sys_nanosleep
 163	i386	mremap			sys_mremap
 164	i386	setresuid		sys_setresuid16
 165	i386	getresuid		sys_getresuid16
-166	i386	vm86			ptregs_vm86			sys32_vm86_warning
+166	i386	vm86			sys_vm86			sys32_vm86_warning
 167	i386	query_module
 168	i386	poll			sys_poll
 169	i386	nfsservctl
 170	i386	setresgid		sys_setresgid16
 171	i386	getresgid		sys_getresgid16
 172	i386	prctl			sys_prctl
-173	i386	rt_sigreturn		ptregs_rt_sigreturn		stub32_rt_sigreturn
-174	i386	rt_sigaction		sys_rt_sigaction		sys32_rt_sigaction
+173	i386	rt_sigreturn		sys_rt_sigreturn		stub32_rt_sigreturn
+174	i386	rt_sigaction		sys_rt_sigaction		compat_sys_rt_sigaction
 175	i386	rt_sigprocmask		sys_rt_sigprocmask
-176	i386	rt_sigpending		sys_rt_sigpending		sys32_rt_sigpending
+176	i386	rt_sigpending		sys_rt_sigpending		compat_sys_rt_sigpending
 177	i386	rt_sigtimedwait		sys_rt_sigtimedwait		compat_sys_rt_sigtimedwait
-178	i386	rt_sigqueueinfo		sys_rt_sigqueueinfo		sys32_rt_sigqueueinfo
+178	i386	rt_sigqueueinfo		sys_rt_sigqueueinfo		compat_sys_rt_sigqueueinfo
 179	i386	rt_sigsuspend		sys_rt_sigsuspend
 180	i386	pread64			sys_pread64			sys32_pread
 181	i386	pwrite64		sys_pwrite64			sys32_pwrite
diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
index dc97328bd90a..38ae65dfd14f 100644
--- a/arch/x86/syscalls/syscall_64.tbl
+++ b/arch/x86/syscalls/syscall_64.tbl
@@ -325,7 +325,7 @@
 # x32-specific system call numbers start at 512 to avoid cache impact
 # for native 64-bit operation.
 #
-512	x32	rt_sigaction		sys32_rt_sigaction
+512	x32	rt_sigaction		compat_sys_rt_sigaction
 513	x32	rt_sigreturn		stub_x32_rt_sigreturn
 514	x32	ioctl			compat_sys_ioctl
 515	x32	readv			compat_sys_readv
@@ -335,9 +335,9 @@
 519	x32	recvmsg			compat_sys_recvmsg
 520	x32	execve			stub_x32_execve
 521	x32	ptrace			compat_sys_ptrace
-522	x32	rt_sigpending		sys32_rt_sigpending
+522	x32	rt_sigpending		compat_sys_rt_sigpending
 523	x32	rt_sigtimedwait		compat_sys_rt_sigtimedwait
-524	x32	rt_sigqueueinfo		sys32_rt_sigqueueinfo
+524	x32	rt_sigqueueinfo		compat_sys_rt_sigqueueinfo
 525	x32	sigaltstack		compat_sys_sigaltstack
 526	x32	timer_create		compat_sys_timer_create
 527	x32	mq_notify		compat_sys_mq_notify
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index 21a13ce1d751..14ef8d1dbc33 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -13,7 +13,6 @@ endmenu
 config UML_X86
 	def_bool y
 	select GENERIC_FIND_FIRST_BIT
-	select GENERIC_SIGALTSTACK
 
 config 64BIT
 	bool "64-bit kernel" if SUBARCH = "x86"
@@ -25,6 +24,8 @@ config X86_32
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 
 config X86_64
 	def_bool 64BIT
diff --git a/arch/x86/um/Makefile b/arch/x86/um/Makefile
index 5d065b2222d3..eafa324eb7a5 100644
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -10,7 +10,7 @@ endif
 
 obj-y = bug.o bugs_$(BITS).o delay.o fault.o ksyms.o ldt.o \
 	ptrace_$(BITS).o ptrace_user.o setjmp_$(BITS).o signal.o \
-	stub_$(BITS).o stub_segv.o syscalls_$(BITS).o \
+	stub_$(BITS).o stub_segv.o \
 	sys_call_table_$(BITS).o sysrq_$(BITS).o tls_$(BITS).o \
 	mem_$(BITS).o subarch.o os-$(OS)/
 
@@ -25,7 +25,7 @@ subarch-$(CONFIG_HIGHMEM) += ../mm/highmem_32.o
 
 else
 
-obj-y += vdso/
+obj-y += syscalls_64.o vdso/
 
 subarch-y = ../lib/csum-partial_64.o ../lib/memcpy_64.o ../lib/thunk_64.o \
 		../lib/rwsem.o
diff --git a/arch/x86/um/shared/sysdep/syscalls_32.h b/arch/x86/um/shared/sysdep/syscalls_32.h
index 8436079be914..68fd2cf526fd 100644
--- a/arch/x86/um/shared/sysdep/syscalls_32.h
+++ b/arch/x86/um/shared/sysdep/syscalls_32.h
@@ -8,11 +8,6 @@
 
 typedef long syscall_handler_t(struct pt_regs);
 
-/* Not declared on x86, incompatible declarations on x86_64, so these have
- * to go here rather than in sys_call_table.c
- */
-extern syscall_handler_t sys_rt_sigaction;
-
 extern syscall_handler_t *sys_call_table[];
 
 #define EXECUTE_SYSCALL(syscall, regs) \
diff --git a/arch/x86/um/signal.c b/arch/x86/um/signal.c
index 71cef48ea5cd..ae7319db18ee 100644
--- a/arch/x86/um/signal.c
+++ b/arch/x86/um/signal.c
@@ -464,7 +464,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
 	return 0;
 }
 
-long sys_sigreturn(struct pt_regs *regs)
+long sys_sigreturn(void)
 {
 	unsigned long sp = PT_REGS_SP(&current->thread.regs);
 	struct sigframe __user *frame = (struct sigframe __user *)(sp - 8);
@@ -577,7 +577,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
 }
 #endif
 
-long sys_rt_sigreturn(struct pt_regs *regs)
+long sys_rt_sigreturn(void)
 {
 	unsigned long sp = PT_REGS_SP(&current->thread.regs);
 	struct rt_sigframe __user *frame =
@@ -601,14 +601,3 @@ long sys_rt_sigreturn(struct pt_regs *regs)
 	force_sig(SIGSEGV, current);
 	return 0;
 }
-
-#ifdef CONFIG_X86_32
-long ptregs_sigreturn(void)
-{
-	return sys_sigreturn(NULL);
-}
-long ptregs_rt_sigreturn(void)
-{
-	return sys_rt_sigreturn(NULL);
-}
-#endif
diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c
index a0c3b0d1a122..531d4269e2e3 100644
--- a/arch/x86/um/sys_call_table_32.c
+++ b/arch/x86/um/sys_call_table_32.c
@@ -24,10 +24,6 @@
 
 #define old_mmap sys_old_mmap
 
-#define ptregs_iopl sys_iopl
-#define ptregs_vm86old sys_vm86old
-#define ptregs_vm86 sys_vm86
-
 #define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void sym(void) ;
 #include <asm/syscalls_32.h>
 
diff --git a/arch/x86/um/syscalls_32.c b/arch/x86/um/syscalls_32.c
deleted file mode 100644
index e8bcea99acdb..000000000000
--- a/arch/x86/um/syscalls_32.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/* 
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include <linux/syscalls.h>
-#include <sysdep/syscalls.h>
-
-long sys_sigaction(int sig, const struct old_sigaction __user *act,
-			 struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}