Merge branches 'arch-alpha', 'arch-arm', 'arch-arm64', 'arch-avr32', …

…'arch-blackfin', 'arch-c6x', 'arch-cris', 'arch-frv', 'arch-h8300', 'arch-hexagon', 'arch-ia64', 'arch-m32r', 'arch-m68k', 'arch-microblaze', 'arch-mips', 'arch-mn10300', 'arch-openrisc', 'arch-parisc', 'arch-powerpc', 'arch-s390', 'arch-score', 'arch-sh', 'arch-sparc', 'arch-tile', 'arch-unicore32', 'arch-x86' and 'arch-xtensa'

arch/arm/Kconfig

@@ -56,6 +56,9 @@ config ARM
 	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 	help
 	  The ARM series is a line of low-power-consumption RISC chip designs
 	  licensed by ARM Ltd and targeted at embedded applications and

arch/arm/include/asm/signal.h

@@ -16,13 +16,6 @@ typedef struct {
 	unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
 #define __ARCH_HAS_SA_RESTORER
 
 #include <asm/sigcontext.h>

arch/arm/kernel/calls.S

@@ -195,7 +195,7 @@
 		CALL(sys_getcwd)
 		CALL(sys_capget)
 /* 185 */	CALL(sys_capset)
-		CALL(sys_sigaltstack_wrapper)
+		CALL(sys_sigaltstack)
 		CALL(sys_sendfile)
 		CALL(sys_ni_syscall)		/* getpmsg */
 		CALL(sys_ni_syscall)		/* putpmsg */

arch/arm/kernel/entry-common.S

@@ -514,11 +514,6 @@ sys_rt_sigreturn_wrapper:
 		b	sys_rt_sigreturn
 ENDPROC(sys_rt_sigreturn_wrapper)
 
-sys_sigaltstack_wrapper:
-		ldr	r2, [sp, #S_OFF + S_SP]
-		b	do_sigaltstack
-ENDPROC(sys_sigaltstack_wrapper)
-
 sys_statfs64_wrapper:
 		teq	r1, #88
 		moveq	r1, #84

arch/arm/kernel/signal.c

@@ -45,48 +45,6 @@ const unsigned long sigreturn_codes[7] = {
 	MOV_R7_NR_RT_SIGRETURN, SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN,
 };
 
-/*
- * atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, 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;
-
-	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;
-}
-
 #ifdef CONFIG_CRUNCH
 static int preserve_crunch_context(struct crunch_sigframe __user *frame)
 {
@@ -300,7 +258,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigframe(regs, &frame->sig))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
+	if (restore_altstack(&frame->sig.uc.uc_stack))
 		goto badframe;
 
 	return regs->ARM_r0;
@@ -486,7 +444,6 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	       sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame = get_sigframe(ka, regs, sizeof(*frame));
-	stack_t stack;
 	int err = 0;
 
 	if (!frame)
@@ -497,12 +454,7 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	__put_user_error(0, &frame->sig.uc.uc_flags, err);
 	__put_user_error(NULL, &frame->sig.uc.uc_link, err);
 
-	memset(&stack, 0, sizeof(stack));
-	stack.ss_sp = (void __user *)current->sas_ss_sp;
-	stack.ss_flags = sas_ss_flags(regs->ARM_sp);
-	stack.ss_size = current->sas_ss_size;
-	err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
-
+	err |= __save_altstack(&frame->sig.uc.uc_stack, regs->ARM_sp);
 	err |= setup_sigframe(&frame->sig, regs, set);
 	if (err == 0)
 		err = setup_return(regs, ka, frame->sig.retcode, frame, usig);

arch/arm64/Kconfig

@@ -6,10 +6,15 @@ config ARM64
 	select CLONE_BACKWARDS
 	select COMMON_CLK
 	select GENERIC_CLOCKEVENTS
+	select GENERIC_COMPAT_RT_SIGACTION
+	select GENERIC_COMPAT_RT_SIGPENDING
+	select GENERIC_COMPAT_RT_SIGPROCMASK
+	select GENERIC_COMPAT_RT_SIGQUEUEINFO
 	select GENERIC_HARDIRQS_NO_DEPRECATED
 	select GENERIC_IOMAP
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
+	select GENERIC_SIGALTSTACK
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_TIME_VSYSCALL
 	select HARDIRQS_SW_RESEND
@@ -204,6 +209,8 @@ config COMPAT
 	depends on !ARM64_64K_PAGES
 	select COMPAT_BINFMT_ELF
 	select HAVE_UID16
+	select OLD_SIGSUSPEND3
+	select COMPAT_OLD_SIGACTION
 	help
 	  This option enables support for a 32-bit EL0 running under a 64-bit
 	  kernel at EL1. AArch32-specific components such as system calls,

arch/arm64/include/asm/syscalls.h

@@ -24,8 +24,6 @@
  * System call wrappers implemented in kernel/entry.S.
  */
 asmlinkage long sys_rt_sigreturn_wrapper(void);
-asmlinkage long sys_sigaltstack_wrapper(const stack_t __user *uss,
-					stack_t __user *uoss);
 
 #include <asm-generic/syscalls.h>
 

arch/arm64/include/asm/unistd32.h

@@ -93,7 +93,7 @@ __SYSCALL(68,  sys_ni_syscall)			/* 68 was sys_sgetmask */
 __SYSCALL(69,  sys_ni_syscall)			/* 69 was sys_ssetmask */
 __SYSCALL(70,  sys_setreuid16)
 __SYSCALL(71,  sys_setregid16)
-__SYSCALL(72,  compat_sys_sigsuspend)
+__SYSCALL(72,  sys_sigsuspend)
 __SYSCALL(73,  compat_sys_sigpending)
 __SYSCALL(74,  sys_sethostname)
 __SYSCALL(75,  compat_sys_setrlimit)
@@ -207,7 +207,7 @@ __SYSCALL(182, sys_chown16)
 __SYSCALL(183, sys_getcwd)
 __SYSCALL(184, sys_capget)
 __SYSCALL(185, sys_capset)
-__SYSCALL(186, compat_sys_sigaltstack_wrapper)
+__SYSCALL(186, compat_sys_sigaltstack)
 __SYSCALL(187, compat_sys_sendfile)
 __SYSCALL(188, sys_ni_syscall)			/* 188 reserved */
 __SYSCALL(189, sys_ni_syscall)			/* 189 reserved */

arch/arm64/kernel/entry.S

@@ -677,10 +677,5 @@ ENTRY(sys_rt_sigreturn_wrapper)
 	b	sys_rt_sigreturn
 ENDPROC(sys_rt_sigreturn_wrapper)
 
-ENTRY(sys_sigaltstack_wrapper)
-	ldr	x2, [sp, #S_SP]
-	b	sys_sigaltstack
-ENDPROC(sys_sigaltstack_wrapper)
-
 ENTRY(handle_arch_irq)
 	.quad	0

arch/arm64/kernel/signal.c

@@ -149,8 +149,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigframe(regs, frame))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack,
-			   NULL, regs->sp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return regs->regs[0];
@@ -164,12 +163,6 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 	return 0;
 }
 
-asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-				unsigned long sp)
-{
-	return do_sigaltstack(uss, uoss, sp);
-}
-
 static int setup_sigframe(struct rt_sigframe __user *sf,
 			  struct pt_regs *regs, sigset_t *set)
 {
@@ -250,7 +243,6 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 			  sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
-	stack_t stack;
 	int err = 0;
 
 	frame = get_sigframe(ka, regs);
@@ -260,12 +252,7 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	__put_user_error(0, &frame->uc.uc_flags, err);
 	__put_user_error(NULL, &frame->uc.uc_link, err);
 
-	memset(&stack, 0, sizeof(stack));
-	stack.ss_sp = (void __user *)current->sas_ss_sp;
-	stack.ss_flags = sas_ss_flags(regs->sp);
-	stack.ss_size = current->sas_ss_size;
-	err |= __copy_to_user(&frame->uc.uc_stack, &stack, sizeof(stack));
-
+	err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
 	err |= setup_sigframe(frame, regs, set);
 	if (err == 0) {
 		setup_return(regs, ka, frame, usig);