x86,um: switch to generic old sigsuspend()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/um/kernel/signal.c

@@ -122,13 +122,3 @@ int do_signal(void)
 {
 	return kern_do_signal(&current->thread.regs);
 }
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}

arch/x86/Kconfig

@@ -116,6 +116,7 @@ config X86
 	select GENERIC_SIGALTSTACK
 	select GENERIC_COMPAT_RT_SIGQUEUEINFO
 	select GENERIC_COMPAT_RT_SIGPENDING
+	select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION
 
 config INSTRUCTION_DECODER
 	def_bool y

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.
  */

arch/x86/include/asm/sys_ia32.h

@@ -66,7 +66,6 @@ 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(void);
 asmlinkage long sys32_rt_sigreturn(void);
 

arch/x86/include/asm/syscalls.h

@@ -34,7 +34,6 @@ 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(void);

arch/x86/kernel/signal.c

@@ -536,17 +536,6 @@ static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
 }
 
 #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)

arch/x86/syscalls/syscall_32.tbl

@@ -78,7 +78,7 @@
 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

arch/x86/um/Kconfig

@@ -25,6 +25,7 @@ config X86_32
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
+	select OLD_SIGSUSPEND3
 
 config X86_64
 	def_bool 64BIT