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()
  ...

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

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;

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 */
-};
+#define __ARCH_HAS_SA_RESTORER
 
-struct k_sigaction {
-	struct sigaction sa;
-};
-
-#else /* __i386__ */
-#endif /* !__i386__ */
 #include <asm/sigcontext.h>
 
 #ifdef __i386__

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);

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 */
 

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

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;