Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask

Conflicts:
	arch/x86/kernel/io_apic.c
	kernel/rcuclassic.c
	kernel/sched.c
	kernel/time/tick-sched.c

Signed-off-by: Mike Travis <travis@sgi.com>
[ mingo@elte.hu: backmerged typo fix for io_apic.c ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 80 insertions, 74 deletions

diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index ce3e851..b22fdfa 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -2,7 +2,7 @@
  * arch/sh/kernel/signal_64.c
  *
  * Copyright (C) 2000, 2001  Paolo Alberelli
- * Copyright (C) 2003  Paul Mundt
+ * Copyright (C) 2003 - 2008  Paul Mundt
  * Copyright (C) 2004  Richard Curnow
  *
  * This file is subject to the terms and conditions of the GNU General Public
@@ -43,10 +43,38 @@
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
-static void
+static int
 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 		sigset_t *oldset, struct pt_regs * regs);
 
+static inline void
+handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa)
+{
+	/* If we're not from a syscall, bail out */
+	if (regs->syscall_nr < 0)
+		return;
+
+	/* check for system call restart.. */
+	switch (regs->regs[REG_RET]) {
+		case -ERESTART_RESTARTBLOCK:
+		case -ERESTARTNOHAND:
+		no_system_call_restart:
+			regs->regs[REG_RET] = -EINTR;
+			regs->sr |= 1;
+			break;
+
+		case -ERESTARTSYS:
+			if (!(sa->sa_flags & SA_RESTART))
+				goto no_system_call_restart;
+		/* fallthrough */
+		case -ERESTARTNOINTR:
+			/* Decode syscall # */
+			regs->regs[REG_RET] = regs->syscall_nr;
+			regs->pc -= 4;
+			break;
+	}
+}
+
 /*
  * Note that 'init' is a special process: it doesn't get signals it doesn't
  * want to handle. Thus you cannot kill init even with a SIGKILL even by
@@ -80,21 +108,23 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
 		oldset = &current->blocked;
 
 	signr = get_signal_to_deliver(&info, &ka, regs, 0);
-
 	if (signr > 0) {
-		/* Whee!  Actually deliver the signal.  */
-		handle_signal(signr, &info, &ka, oldset, regs);
+		if (regs->sr & 1)
+			handle_syscall_restart(regs, &ka.sa);
 
-		/*
-		 * If a signal was successfully delivered, the saved sigmask
-		 * is in its frame, and we can clear the TIF_RESTORE_SIGMASK
-		 * flag.
-		 */
-		if (test_thread_flag(TIF_RESTORE_SIGMASK))
-			clear_thread_flag(TIF_RESTORE_SIGMASK);
-
-		tracehook_signal_handler(signr, &info, &ka, regs, 0);
-		return 1;
+		/* Whee!  Actually deliver the signal.  */
+		if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
+			/*
+			 * If a signal was successfully delivered, the
+			 * saved sigmask is in its frame, and we can
+			 * clear the TIF_RESTORE_SIGMASK flag.
+			 */
+			if (test_thread_flag(TIF_RESTORE_SIGMASK))
+				clear_thread_flag(TIF_RESTORE_SIGMASK);
+
+			tracehook_signal_handler(signr, &info, &ka, regs, 0);
+			return 1;
+		}
 	}
 
 no_signal:
@@ -129,7 +159,6 @@ no_signal:
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
-
 asmlinkage int
 sys_sigsuspend(old_sigset_t mask,
 	       unsigned long r3, unsigned long r4, unsigned long r5,
@@ -235,20 +264,16 @@ sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
 	return do_sigaltstack(uss, uoss, REF_REG_SP);
 }
 
-
 /*
  * Do a signal return; undo the signal stack.
  */
-
-struct sigframe
-{
+struct sigframe {
 	struct sigcontext sc;
 	unsigned long extramask[_NSIG_WORDS-1];
 	long long retcode[2];
 };
 
-struct rt_sigframe
-{
+struct rt_sigframe {
 	struct siginfo __user *pinfo;
 	void *puc;
 	struct siginfo info;
@@ -450,7 +475,6 @@ badframe:
 /*
  * Set up a signal frame.
  */
-
 static int
 setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
 		 unsigned long mask)
@@ -504,8 +528,8 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
 void sa_default_restorer(void);		/* See comments below */
 void sa_default_rt_restorer(void);	/* See comments below */
 
-static void setup_frame(int sig, struct k_sigaction *ka,
-			sigset_t *set, struct pt_regs *regs)
+static int setup_frame(int sig, struct k_sigaction *ka,
+		       sigset_t *set, struct pt_regs *regs)
 {
 	struct sigframe __user *frame;
 	int err = 0;
@@ -596,23 +620,21 @@ static void setup_frame(int sig, struct k_sigaction *ka,
 
 	set_fs(USER_DS);
 
-#if DEBUG_SIG
 	/* Broken %016Lx */
-	printk("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n",
-		signal,
-		current->comm, current->pid, frame,
-		regs->pc >> 32, regs->pc & 0xffffffff,
-		DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff);
-#endif
+	pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n",
+		 signal, current->comm, current->pid, frame,
+		 regs->pc >> 32, regs->pc & 0xffffffff,
+		 DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff);
 
-	return;
+	return 0;
 
 give_sigsegv:
 	force_sigsegv(sig, current);
+	return -EFAULT;
 }
 
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
-			   sigset_t *set, struct pt_regs *regs)
+static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+			  sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
 	int err = 0;
@@ -702,62 +724,46 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	set_fs(USER_DS);
 
-#if DEBUG_SIG
-	/* Broken %016Lx */
-	printk("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n",
-		signal,
-		current->comm, current->pid, frame,
-		regs->pc >> 32, regs->pc & 0xffffffff,
-		DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff);
-#endif
+	pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n",
+		 signal, current->comm, current->pid, frame,
+		 regs->pc >> 32, regs->pc & 0xffffffff,
+		 DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff);
 
-	return;
+	return 0;
 
 give_sigsegv:
 	force_sigsegv(sig, current);
+	return -EFAULT;
 }
 
 /*
  * OK, we're invoking a handler
  */
-
-static void
+static int
 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 		sigset_t *oldset, struct pt_regs * regs)
 {
-	/* Are we from a system call? */
-	if (regs->syscall_nr >= 0) {
-		/* If so, check system call restarting.. */
-		switch (regs->regs[REG_RET]) {
-			case -ERESTART_RESTARTBLOCK:
-			case -ERESTARTNOHAND:
-			no_system_call_restart:
-				regs->regs[REG_RET] = -EINTR;
-				break;
-
-			case -ERESTARTSYS:
-				if (!(ka->sa.sa_flags & SA_RESTART))
-					goto no_system_call_restart;
-			/* fallthrough */
-			case -ERESTARTNOINTR:
-				/* Decode syscall # */
-				regs->regs[REG_RET] = regs->syscall_nr;
-				regs->pc -= 4;
-		}
-	}
+	int ret;
 
 	/* Set up the stack frame */
 	if (ka->sa.sa_flags & SA_SIGINFO)
-		setup_rt_frame(sig, ka, info, oldset, regs);
+		ret = setup_rt_frame(sig, ka, info, oldset, regs);
 	else
-		setup_frame(sig, ka, oldset, regs);
+		ret = setup_frame(sig, ka, oldset, regs);
+
+	if (ka->sa.sa_flags & SA_ONESHOT)
+		ka->sa.sa_handler = SIG_DFL;
+
+	if (ret == 0) {
+		spin_lock_irq(&current->sighand->siglock);
+		sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
+		if (!(ka->sa.sa_flags & SA_NODEFER))
+			sigaddset(&current->blocked,sig);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
 
-	spin_lock_irq(&current->sighand->siglock);
-	sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-	if (!(ka->sa.sa_flags & SA_NODEFER))
-		sigaddset(&current->blocked,sig);
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	return ret;
 }
 
 asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)