Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes

16 files changed, 246 insertions, 308 deletions

diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 7c88263256a..923a98959fa 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -17,6 +17,7 @@ config SPARC64
 	select HAVE_LMB
 	select HAVE_ARCH_KGDB
 	select USE_GENERIC_SMP_HELPERS if SMP
+	select HAVE_ARCH_TRACEHOOK
 
 config GENERIC_TIME
 	bool
diff --git a/arch/sparc64/kernel/compat_audit.c b/arch/sparc64/kernel/compat_audit.c
index c1979482aa9..c831b0a4e66 100644
--- a/arch/sparc64/kernel/compat_audit.c
+++ b/arch/sparc64/kernel/compat_audit.c
@@ -1,4 +1,4 @@
-#include <asm-sparc/unistd.h>
+#include <asm/unistd_32.h>
 
 unsigned sparc32_dir_class[] = {
 #include <asm-generic/audit_dir_write.h>
diff --git a/arch/sparc64/kernel/entry.h b/arch/sparc64/kernel/entry.h
index 32fbab62085..fc294a29289 100644
--- a/arch/sparc64/kernel/entry.h
+++ b/arch/sparc64/kernel/entry.h
@@ -22,8 +22,7 @@ extern void do_notify_resume(struct pt_regs *regs,
 			     unsigned long orig_i0,
 			     unsigned long thread_info_flags);
 
-extern asmlinkage void syscall_trace(struct pt_regs *regs,
-				     int syscall_exit_p);
+extern asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p);
 
 extern void bad_trap_tl1(struct pt_regs *regs, long lvl);
 
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index c481673d249..ba43d85e8dd 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -915,12 +915,18 @@ static void __init sun4v_init_mondo_queues(void)
 		alloc_one_mondo(&tb->nonresum_mondo_pa, tb->nonresum_qmask);
 		alloc_one_kbuf(&tb->nonresum_kernel_buf_pa,
 			       tb->nonresum_qmask);
+	}
+}
+
+static void __init init_send_mondo_info(void)
+{
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		struct trap_per_cpu *tb = &trap_block[cpu];
 
 		init_cpu_send_mondo_info(tb);
 	}
-
-	/* Load up the boot cpu's entries.  */
-	sun4v_register_mondo_queues(hard_smp_processor_id());
 }
 
 static struct irqaction timer_irq_action = {
@@ -949,6 +955,13 @@ void __init init_IRQ(void)
 	if (tlb_type == hypervisor)
 		sun4v_init_mondo_queues();
 
+	init_send_mondo_info();
+
+	if (tlb_type == hypervisor) {
+		/* Load up the boot cpu's entries.  */
+		sun4v_register_mondo_queues(hard_smp_processor_id());
+	}
+
 	/* We need to clear any IRQ's pending in the soft interrupt
 	 * registers, a spurious one could be left around from the
 	 * PROM timer which we just disabled.
diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c
index 4fd48ab7dda..f8b50cbf4bf 100644
--- a/arch/sparc64/kernel/of_device.c
+++ b/arch/sparc64/kernel/of_device.c
@@ -56,9 +56,6 @@ struct of_device *of_find_device_by_node(struct device_node *dp)
 EXPORT_SYMBOL(of_find_device_by_node);
 
 #ifdef CONFIG_PCI
-struct bus_type isa_bus_type;
-EXPORT_SYMBOL(isa_bus_type);
-
 struct bus_type ebus_bus_type;
 EXPORT_SYMBOL(ebus_bus_type);
 #endif
@@ -842,8 +839,6 @@ static int __init of_bus_driver_init(void)
 	err = of_bus_type_init(&of_platform_bus_type, "of");
 #ifdef CONFIG_PCI
 	if (!err)
-		err = of_bus_type_init(&isa_bus_type, "isa");
-	if (!err)
 		err = of_bus_type_init(&ebus_bus_type, "ebus");
 #endif
 #ifdef CONFIG_SBUS
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 8a9cd3e165b..7f5debdc5fe 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -52,8 +52,6 @@
 #include <asm/irq_regs.h>
 #include <asm/smp.h>
 
-/* #define VERBOSE_SHOWREGS */
-
 static void sparc64_yield(int cpu)
 {
 	if (tlb_type != hypervisor)
@@ -213,22 +211,8 @@ static void show_regwindow(struct pt_regs *regs)
 		printk("I7: <%pS>\n", (void *) rwk->ins[7]);
 }
 
-#ifdef CONFIG_SMP
-static DEFINE_SPINLOCK(regdump_lock);
-#endif
-
-void __show_regs(struct pt_regs * regs)
+void show_regs(struct pt_regs *regs)
 {
-#ifdef CONFIG_SMP
-	unsigned long flags;
-
-	/* Protect against xcall ipis which might lead to livelock on the lock */
-	__asm__ __volatile__("rdpr      %%pstate, %0\n\t"
-			     "wrpr      %0, %1, %%pstate"
-			     : "=r" (flags)
-			     : "i" (PSTATE_IE));
-	spin_lock(&regdump_lock);
-#endif
 	printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x    %s\n", regs->tstate,
 	       regs->tpc, regs->tnpc, regs->y, print_tainted());
 	printk("TPC: <%pS>\n", (void *) regs->tpc);
@@ -246,64 +230,24 @@ void __show_regs(struct pt_regs * regs)
 	       regs->u_regs[15]);
 	printk("RPC: <%pS>\n", (void *) regs->u_regs[15]);
 	show_regwindow(regs);
-#ifdef CONFIG_SMP
-	spin_unlock(&regdump_lock);
-	__asm__ __volatile__("wrpr	%0, 0, %%pstate"
-			     : : "r" (flags));
-#endif
 }
 
-#ifdef VERBOSE_SHOWREGS
-static void idump_from_user (unsigned int *pc)
-{
-	int i;
-	int code;
-	
-	if((((unsigned long) pc) & 3))
-		return;
-	
-	pc -= 3;
-	for(i = -3; i < 6; i++) {
-		get_user(code, pc);
-		printk("%c%08x%c",i?' ':'<',code,i?' ':'>');
-		pc++;
-	}
-	printk("\n");
-}
-#endif
+struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
+static DEFINE_SPINLOCK(global_reg_snapshot_lock);
 
-void show_regs(struct pt_regs *regs)
+static bool kstack_valid(struct thread_info *tp, struct reg_window *rw)
 {
-#ifdef VERBOSE_SHOWREGS
-	extern long etrap, etraptl1;
-#endif
-	__show_regs(regs);
-#if 0
-#ifdef CONFIG_SMP
-	{
-		extern void smp_report_regs(void);
+	unsigned long thread_base, fp;
 
-		smp_report_regs();
-	}
-#endif
-#endif
+	thread_base = (unsigned long) tp;
+	fp = (unsigned long) rw;
 
-#ifdef VERBOSE_SHOWREGS	
-	if (regs->tpc >= &etrap && regs->tpc < &etraptl1 &&
-	    regs->u_regs[14] >= (long)current - PAGE_SIZE &&
-	    regs->u_regs[14] < (long)current + 6 * PAGE_SIZE) {
-		printk ("*********parent**********\n");
-		__show_regs((struct pt_regs *)(regs->u_regs[14] + PTREGS_OFF));
-		idump_from_user(((struct pt_regs *)(regs->u_regs[14] + PTREGS_OFF))->tpc);
-		printk ("*********endpar**********\n");
-	}
-#endif
+	if (fp < (thread_base + sizeof(struct thread_info)) ||
+	    fp >= (thread_base + THREAD_SIZE))
+		return false;
+	return true;
 }
 
-#ifdef CONFIG_MAGIC_SYSRQ
-struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
-static DEFINE_SPINLOCK(global_reg_snapshot_lock);
-
 static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
 			      int this_cpu)
 {
@@ -315,14 +259,22 @@ static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
 	global_reg_snapshot[this_cpu].o7 = regs->u_regs[UREG_I7];
 
 	if (regs->tstate & TSTATE_PRIV) {
+		struct thread_info *tp = current_thread_info();
 		struct reg_window *rw;
 
 		rw = (struct reg_window *)
 			(regs->u_regs[UREG_FP] + STACK_BIAS);
-		global_reg_snapshot[this_cpu].i7 = rw->ins[6];
-	} else
+		if (kstack_valid(tp, rw)) {
+			global_reg_snapshot[this_cpu].i7 = rw->ins[7];
+			rw = (struct reg_window *)
+				(rw->ins[6] + STACK_BIAS);
+			if (kstack_valid(tp, rw))
+				global_reg_snapshot[this_cpu].rpc = rw->ins[7];
+		}
+	} else {
 		global_reg_snapshot[this_cpu].i7 = 0;
-
+		global_reg_snapshot[this_cpu].rpc = 0;
+	}
 	global_reg_snapshot[this_cpu].thread = tp;
 }
 
@@ -341,7 +293,7 @@ static void __global_reg_poll(struct global_reg_snapshot *gp)
 	}
 }
 
-static void sysrq_handle_globreg(int key, struct tty_struct *tty)
+void __trigger_all_cpu_backtrace(void)
 {
 	struct thread_info *tp = current_thread_info();
 	struct pt_regs *regs = get_irq_regs();
@@ -375,13 +327,14 @@ static void sysrq_handle_globreg(int key, struct tty_struct *tty)
 		       ((tp && tp->task) ? tp->task->pid : -1));
 
 		if (gp->tstate & TSTATE_PRIV) {
-			printk("             TPC[%pS] O7[%pS] I7[%pS]\n",
+			printk("             TPC[%pS] O7[%pS] I7[%pS] RPC[%pS]\n",
 			       (void *) gp->tpc,
 			       (void *) gp->o7,
-			       (void *) gp->i7);
+			       (void *) gp->i7,
+			       (void *) gp->rpc);
 		} else {
-			printk("             TPC[%lx] O7[%lx] I7[%lx]\n",
-			       gp->tpc, gp->o7, gp->i7);
+			printk("             TPC[%lx] O7[%lx] I7[%lx] RPC[%lx]\n",
+			       gp->tpc, gp->o7, gp->i7, gp->rpc);
 		}
 	}
 
@@ -390,6 +343,13 @@ static void sysrq_handle_globreg(int key, struct tty_struct *tty)
 	spin_unlock_irqrestore(&global_reg_snapshot_lock, flags);
 }
 
+#ifdef CONFIG_MAGIC_SYSRQ
+
+static void sysrq_handle_globreg(int key, struct tty_struct *tty)
+{
+	__trigger_all_cpu_backtrace();
+}
+
 static struct sysrq_key_op sparc_globalreg_op = {
 	.handler	= sysrq_handle_globreg,
 	.help_msg	= "Globalregs",
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index f6c9fc92921..bd578cc4856 100644
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -23,6 +23,7 @@
 #include <linux/audit.h>
 #include <linux/signal.h>
 #include <linux/regset.h>
+#include <linux/tracehook.h>
 #include <linux/compat.h>
 #include <linux/elf.h>
 
@@ -1049,8 +1050,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	return ret;
 }
 
-asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
+asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
 {
+	int ret = 0;
+
 	/* do the secure computing check first */
 	secure_computing(regs->u_regs[UREG_G1]);
 
@@ -1064,27 +1067,14 @@ asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
 		audit_syscall_exit(result, regs->u_regs[UREG_I0]);
 	}
 
-	if (!(current->ptrace & PT_PTRACED))
-		goto out;
-
-	if (!test_thread_flag(TIF_SYSCALL_TRACE))
-		goto out;
-
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				 ? 0x80 : 0));
-
-	/*
-	 * this isn't the same as continuing with a signal, but it will do
-	 * for normal use.  strace only continues with a signal if the
-	 * stopping signal is not SIGTRAP.  -brl
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
+	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
+		if (syscall_exit_p)
+			tracehook_report_syscall_exit(regs, 0);
+		else
+			ret = tracehook_report_syscall_entry(regs);
 	}
 
-out:
-	if (unlikely(current->audit_context) && !syscall_exit_p)
+	if (unlikely(current->audit_context) && !syscall_exit_p && !ret)
 		audit_syscall_entry((test_thread_flag(TIF_32BIT) ?
 				     AUDIT_ARCH_SPARC :
 				     AUDIT_ARCH_SPARC64),
@@ -1093,4 +1083,6 @@ out:
 				    regs->u_regs[UREG_I1],
 				    regs->u_regs[UREG_I2],
 				    regs->u_regs[UREG_I3]);
+
+	return ret;
 }
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index c6fc695fe1f..97a993c1f7f 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -46,7 +46,7 @@ __handle_user_windows:
 		wrpr			%g0, RTRAP_PSTATE_IRQOFF, %pstate
 		ldx			[%g6 + TI_FLAGS], %l0
 
-1:		andcc			%l0, _TIF_SIGPENDING, %g0
+1:		andcc			%l0, _TIF_DO_NOTIFY_RESUME_MASK, %g0
 		be,pt			%xcc, __handle_user_windows_continue
 		 nop
 		mov			%l5, %o1
@@ -86,7 +86,7 @@ __handle_perfctrs:
 		 wrpr			%g0, RTRAP_PSTATE, %pstate
 		wrpr			%g0, RTRAP_PSTATE_IRQOFF, %pstate
 		ldx			[%g6 + TI_FLAGS], %l0
-1:		andcc			%l0, _TIF_SIGPENDING, %g0
+1:		andcc			%l0, _TIF_DO_NOTIFY_RESUME_MASK, %g0
 
 		be,pt			%xcc, __handle_perfctrs_continue
 		 sethi			%hi(TSTATE_PEF), %o0
@@ -195,7 +195,7 @@ __handle_preemption_continue:
 		 andcc			%l1, %o0, %g0
 		andcc			%l0, _TIF_NEED_RESCHED, %g0
 		bne,pn			%xcc, __handle_preemption
-		 andcc			%l0, _TIF_SIGPENDING, %g0
+		 andcc			%l0, _TIF_DO_NOTIFY_RESUME_MASK, %g0
 		bne,pn			%xcc, __handle_signal
 __handle_signal_continue:
 		 ldub			[%g6 + TI_WSAVED], %o2
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index 9667e96fd51..ec82d76dc6f 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -2,7 +2,7 @@
  *  arch/sparc64/kernel/signal.c
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
- *  Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ *  Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net)
  *  Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
  *  Copyright (C) 1997 Eddie C. Dost   (ecd@skynet.be)
  *  Copyright (C) 1997,1998 Jakub Jelinek   (jj@sunsite.mff.cuni.cz)
@@ -17,6 +17,7 @@
 #include <linux/errno.h>
 #include <linux/wait.h>
 #include <linux/ptrace.h>
+#include <linux/tracehook.h>
 #include <linux/unistd.h>
 #include <linux/mm.h>
 #include <linux/tty.h>
@@ -89,7 +90,9 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
 	err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
 	err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
 	err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
-	err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7]));
+
+	/* Skip %g7 as that's the thread register in userspace.  */
+
 	err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
 	err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
 	err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
@@ -574,6 +577,8 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 		 * clear the TS_RESTORE_SIGMASK flag.
 		 */
 		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
+
+		tracehook_signal_handler(signr, &info, &ka, regs, 0);
 		return;
 	}
 	if (restart_syscall &&
@@ -605,4 +610,8 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long
 {
 	if (thread_info_flags & _TIF_SIGPENDING)
 		do_signal(regs, orig_i0);
+	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
+		clear_thread_flag(TIF_NOTIFY_RESUME);
+		tracehook_notify_resume(regs);
+	}
 }
diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c
index 97cdd1bf4a1..ba5b09ad666 100644
--- a/arch/sparc64/kernel/signal32.c
+++ b/arch/sparc64/kernel/signal32.c
@@ -19,6 +19,7 @@
 #include <linux/binfmts.h>
 #include <linux/compat.h>
 #include <linux/bitops.h>
+#include <linux/tracehook.h>
 
 #include <asm/uaccess.h>
 #include <asm/ptrace.h>
@@ -794,6 +795,8 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
 		 * clear the TS_RESTORE_SIGMASK flag.
 		 */
 		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
+
+		tracehook_signal_handler(signr, &info, &ka, regs, 0);
 		return;
 	}
 	if (restart_syscall &&
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 7cf72b4bb10..27b81775a4d 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -459,27 +459,35 @@ again:
 	}
 }
 
-static inline void spitfire_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask)
+static void spitfire_xcall_deliver(struct trap_per_cpu *tb, int cnt)
 {
+	u64 *mondo, data0, data1, data2;
+	u16 *cpu_list;
 	u64 pstate;
 	int i;
 
 	__asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
-	for_each_cpu_mask(i, mask)
-		spitfire_xcall_helper(data0, data1, data2, pstate, i);
+	cpu_list = __va(tb->cpu_list_pa);
+	mondo = __va(tb->cpu_mondo_block_pa);
+	data0 = mondo[0];
+	data1 = mondo[1];
+	data2 = mondo[2];
+	for (i = 0; i < cnt; i++)
+		spitfire_xcall_helper(data0, data1, data2, pstate, cpu_list[i]);
 }
 
 /* Cheetah now allows to send the whole 64-bytes of data in the interrupt
  * packet, but we have no use for that.  However we do take advantage of
  * the new pipelining feature (ie. dispatch to multiple cpus simultaneously).
  */
-static void cheetah_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask)
+static void cheetah_xcall_deliver(struct trap_per_cpu *tb, int cnt)
 {
-	u64 pstate, ver, busy_mask;
 	int nack_busy_id, is_jbus, need_more;
+	u64 *mondo, pstate, ver, busy_mask;
+	u16 *cpu_list;
 
-	if (cpus_empty(mask))
-		return;
+	cpu_list = __va(tb->cpu_list_pa);
+	mondo = __va(tb->cpu_mondo_block_pa);
 
 	/* Unfortunately, someone at Sun had the brilliant idea to make the
 	 * busy/nack fields hard-coded by ITID number for this Ultra-III
@@ -502,7 +510,7 @@ retry:
 			     "stxa	%2, [%5] %6\n\t"
 			     "membar	#Sync\n\t"
 			     : /* no outputs */
-			     : "r" (data0), "r" (data1), "r" (data2),
+			     : "r" (mondo[0]), "r" (mondo[1]), "r" (mondo[2]),
 			       "r" (0x40), "r" (0x50), "r" (0x60),
 			       "i" (ASI_INTR_W));
 
@@ -511,11 +519,16 @@ retry:
 	{
 		int i;
 
-		for_each_cpu_mask(i, mask) {
-			u64 target = (i << 14) | 0x70;
+		for (i = 0; i < cnt; i++) {
+			u64 target, nr;
 
+			nr = cpu_list[i];
+			if (nr == 0xffff)
+				continue;
+
+			target = (nr << 14) | 0x70;
 			if (is_jbus) {
-				busy_mask |= (0x1UL << (i * 2));
+				busy_mask |= (0x1UL << (nr * 2));
 			} else {
 				target |= (nack_busy_id << 24);
 				busy_mask |= (0x1UL <<
@@ -549,11 +562,13 @@ retry:
 				__asm__ __volatile__("wrpr %0, 0x0, %%pstate"
 						     : : "r" (pstate));
 				if (unlikely(need_more)) {
-					int i, cnt = 0;
-					for_each_cpu_mask(i, mask) {
-						cpu_clear(i, mask);
-						cnt++;
-						if (cnt == 32)
+					int i, this_cnt = 0;
+					for (i = 0; i < cnt; i++) {
+						if (cpu_list[i] == 0xffff)
+							continue;
+						cpu_list[i] = 0xffff;
+						this_cnt++;
+						if (this_cnt == 32)
 							break;
 					}
 					goto retry;
@@ -584,16 +599,20 @@ retry:
 			/* Clear out the mask bits for cpus which did not
 			 * NACK us.
 			 */
-			for_each_cpu_mask(i, mask) {
-				u64 check_mask;
+			for (i = 0; i < cnt; i++) {
+				u64 check_mask, nr;
+
+				nr = cpu_list[i];
+				if (nr == 0xffff)
+					continue;
 
 				if (is_jbus)
-					check_mask = (0x2UL << (2*i));
+					check_mask = (0x2UL << (2*nr));
 				else
 					check_mask = (0x2UL <<
 						      this_busy_nack);
 				if ((dispatch_stat & check_mask) == 0)
-					cpu_clear(i, mask);
+					cpu_list[i] = 0xffff;
 				this_busy_nack += 2;
 				if (this_busy_nack == 64)
 					break;
@@ -605,47 +624,17 @@ retry:
 }
 
 /* Multi-cpu list version.  */
-static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask)
+static void hypervisor_xcall_deliver(struct trap_per_cpu *tb, int cnt)
 {
-	struct trap_per_cpu *tb;
+	int retries, this_cpu, prev_sent, i, saw_cpu_error;
+	unsigned long status;
 	u16 *cpu_list;
-	u64 *mondo;
-	cpumask_t error_mask;
-	unsigned long flags, status;
-	int cnt, retries, this_cpu, prev_sent, i;
-
-	if (cpus_empty(mask))
-		return;
-
-	/* We have to do this whole thing with interrupts fully disabled.
-	 * Otherwise if we send an xcall from interrupt context it will
-	 * corrupt both our mondo block and cpu list state.
-	 *
-	 * One consequence of this is that we cannot use timeout mechanisms
-	 * that depend upon interrupts being delivered locally.  So, for
-	 * example, we cannot sample jiffies and expect it to advance.
-	 *
-	 * Fortunately, udelay() uses %stick/%tick so we can use that.
-	 */
-	local_irq_save(flags);
 
 	this_cpu = smp_processor_id();
-	tb = &trap_block[this_cpu];
-
-	mondo = __va(tb->cpu_mondo_block_pa);
-	mondo[0] = data0;
-	mondo[1] = data1;
-	mondo[2] = data2;
-	wmb();
 
 	cpu_list = __va(tb->cpu_list_pa);
 
-	/* Setup the initial cpu list.  */
-	cnt = 0;
-	for_each_cpu_mask(i, mask)
-		cpu_list[cnt++] = i;
-
-	cpus_clear(error_mask);
+	saw_cpu_error = 0;
 	retries = 0;
 	prev_sent = 0;
 	do {
@@ -690,10 +679,9 @@ static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t
 					continue;
 
 				err = sun4v_cpu_state(cpu);
-				if (err >= 0 &&
-				    err == HV_CPU_STATE_ERROR) {
+				if (err == HV_CPU_STATE_ERROR) {
+					saw_cpu_error = (cpu + 1);
 					cpu_list[i] = 0xffff;
-					cpu_set(cpu, error_mask);
 				}
 			}
 		} else if (unlikely(status != HV_EWOULDBLOCK))
@@ -717,32 +705,24 @@ static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t
 		}
 	} while (1);
 
-	local_irq_restore(flags);
-
-	if (unlikely(!cpus_empty(error_mask)))
+	if (unlikely(saw_cpu_error))
 		goto fatal_mondo_cpu_error;
 
 	return;
 
 fatal_mondo_cpu_error:
 	printk(KERN_CRIT "CPU[%d]: SUN4V mondo cpu error, some target cpus "
-	       "were in error state\n",
-	       this_cpu);
-	printk(KERN_CRIT "CPU[%d]: Error mask [ ", this_cpu);
-	for_each_cpu_mask(i, error_mask)
-		printk("%d ", i);
-	printk("]\n");
+	       "(including %d) were in error state\n",
+	       this_cpu, saw_cpu_error - 1);
 	return;
 
 fatal_mondo_timeout:
-	local_irq_restore(flags);
 	printk(KERN_CRIT "CPU[%d]: SUN4V mondo timeout, no forward "
 	       " progress after %d retries.\n",
 	       this_cpu, retries);
 	goto dump_cpu_list_and_out;
 
 fatal_mondo_error:
-	local_irq_restore(flags);
 	printk(KERN_CRIT "CPU[%d]: Unexpected SUN4V mondo error %lu\n",
 	       this_cpu, status);
 	printk(KERN_CRIT "CPU[%d]: Args were cnt(%d) cpulist_pa(%lx) "
@@ -756,58 +736,93 @@ dump_cpu_list_and_out:
 	printk("]\n");
 }
 
-/* Send cross call to all processors mentioned in MASK
- * except self.
+static void (*xcall_deliver_impl)(struct trap_per_cpu *, int);
+
+static void xcall_deliver(u64 data0, u64 data1, u64 data2, const cpumask_t *mask)
+{
+	struct trap_per_cpu *tb;
+	int this_cpu, i, cnt;
+	unsigned long flags;
+	u16 *cpu_list;
+	u64 *mondo;
+
+	/* We have to do this whole thing with interrupts fully disabled.
+	 * Otherwise if we send an xcall from interrupt context it will
+	 * corrupt both our mondo block and cpu list state.
+	 *
+	 * One consequence of this is that we cannot use timeout mechanisms
+	 * that depend upon interrupts being delivered locally.  So, for
+	 * example, we cannot sample jiffies and expect it to advance.
+	 *
+	 * Fortunately, udelay() uses %stick/%tick so we can use that.
+	 */
+	local_irq_save(flags);
+
+	this_cpu = smp_processor_id();
+	tb = &trap_block[this_cpu];
+
+	mondo = __va(tb->cpu_mondo_block_pa);
+	mondo[0] = data0;
+	mondo[1] = data1;
+	mondo[2] = data2;
+	wmb();
+
+	cpu_list = __va(tb->cpu_list_pa);
+
+	/* Setup the initial cpu list.  */
+	cnt = 0;
+	for_each_cpu_mask_nr(i, *mask) {
+		if (i == this_cpu || !cpu_online(i))
+			continue;
+		cpu_list[cnt++] = i;
+	}
+
+	if (cnt)
+		xcall_deliver_impl(tb, cnt);
+
+	local_irq_restore(flags);
+}
+
+/* Send cross call to all processors mentioned in MASK_P
+ * except self.  Really, there are only two cases currently,
+ * "&cpu_online_map" and "&mm->cpu_vm_mask".
  */
-static void smp_cross_call_masked(unsigned long *func, u32 ctx, u64 data1, u64 data2, cpumask_t mask)
+static void smp_cross_call_masked(unsigned long *func, u32 ctx, u64 data1, u64 data2, const cpumask_t *mask)
 {
 	u64 data0 = (((u64)ctx)<<32 | (((u64)func) & 0xffffffff));
-	int this_cpu = get_cpu();
-
-	cpus_and(mask, mask, cpu_online_map);
-	cpu_clear(this_cpu, mask);
 
-	if (tlb_type == spitfire)
-		spitfire_xcall_deliver(data0, data1, data2, mask);
-	else if (tlb_type == cheetah || tlb_type == cheetah_plus)
-		cheetah_xcall_deliver(data0, data1, data2, mask);
-	else
-		hypervisor_xcall_deliver(data0, data1, data2, mask);
-	/* NOTE: Caller runs local copy on master. */
+	xcall_deliver(data0, data1, data2, mask);
+}
 
-	put_cpu();
+/* Send cross call to all processors except self. */
+static void smp_cross_call(unsigned long *func, u32 ctx, u64 data1, u64 data2)
+{
+	smp_cross_call_masked(func, ctx, data1, data2, &cpu_online_map);
 }
 
 extern unsigned long xcall_sync_tick;
 
 static void smp_start_sync_tick_client(int cpu)
 {
-	cpumask_t mask = cpumask_of_cpu(cpu);
-
-	smp_cross_call_masked(&xcall_sync_tick,
-			      0, 0, 0, mask);
+	xcall_deliver((u64) &xcall_sync_tick, 0, 0,
+		      &cpumask_of_cpu(cpu));
 }
 
 extern unsigned long xcall_call_function;
 
 void arch_send_call_function_ipi(cpumask_t mask)
 {
-	smp_cross_call_masked(&xcall_call_function, 0, 0, 0, mask);
+	xcall_deliver((u64) &xcall_call_function, 0, 0, &mask);
 }
 
 extern unsigned long xcall_call_function_single;
 
 void arch_send_call_function_single_ipi(int cpu)
 {
-	cpumask_t mask = cpumask_of_cpu(cpu);
-
-	smp_cross_call_masked(&xcall_call_function_single, 0, 0, 0, mask);
+	xcall_deliver((u64) &xcall_call_function_single, 0, 0,
+		      &cpumask_of_cpu(cpu));
 }
 
-/* Send cross call to all processors except self. */
-#define smp_cross_call(func, ctx, data1, data2) \
-	smp_cross_call_masked(func, ctx, data1, data2, cpu_online_map)
-
 void smp_call_function_client(int irq, struct pt_regs *regs)
 {
 	clear_softint(1 << irq);
@@ -843,7 +858,6 @@ void smp_tsb_sync(struct mm_struct *mm)
 extern unsigned long xcall_flush_tlb_mm;
 extern unsigned long xcall_flush_tlb_pending;
 extern unsigned long xcall_flush_tlb_kernel_range;
-extern unsigned long xcall_report_regs;
 #ifdef CONFIG_MAGIC_SYSRQ
 extern unsigned long xcall_fetch_glob_regs;
 #endif
@@ -878,7 +892,6 @@ static inline void __local_flush_dcache_page(struct page *page)
 
 void smp_flush_dcache_page_impl(struct page *page, int cpu)
 {
-	cpumask_t mask = cpumask_of_cpu(cpu);
 	int this_cpu;
 
 	if (tlb_type == hypervisor)
@@ -894,29 +907,24 @@ void smp_flush_dcache_page_impl(struct page *page, int cpu)
 		__local_flush_dcache_page(page);
 	} else if (cpu_online(cpu)) {
 		void *pg_addr = page_address(page);
-		u64 data0;
+		u64 data0 = 0;
 
 		if (tlb_type == spitfire) {
-			data0 =
-				((u64)&xcall_flush_dcache_page_spitfire);
+			data0 = ((u64)&xcall_flush_dcache_page_spitfire);
 			if (page_mapping(page) != NULL)
 				data0 |= ((u64)1 << 32);
-			spitfire_xcall_deliver(data0,
-					       __pa(pg_addr),
-					       (u64) pg_addr,
-					       mask);
 		} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
 #ifdef DCACHE_ALIASING_POSSIBLE
-			data0 =
-				((u64)&xcall_flush_dcache_page_cheetah);
-			cheetah_xcall_deliver(data0,
-					      __pa(pg_addr),
-					      0, mask);
+			data0 =	((u64)&xcall_flush_dcache_page_cheetah);
 #endif
 		}
+		if (data0) {
+			xcall_deliver(data0, __pa(pg_addr),
+				      (u64) pg_addr, &cpumask_of_cpu(cpu));
 #ifdef CONFIG_DEBUG_DCFLUSH
-		atomic_inc(&dcpage_flushes_xcall);
+			atomic_inc(&dcpage_flushes_xcall);
 #endif
+		}
 	}
 
 	put_cpu();
@@ -924,66 +932,41 @@ void smp_flush_dcache_page_impl(struct page *page, int cpu)
 
 void flush_dcache_page_all(struct mm_struct *mm, struct page *page)
 {
-	void *pg_addr = page_address(page);
-	cpumask_t mask = cpu_online_map;
-	u64 data0;
+	void *pg_addr;
 	int this_cpu;
+	u64 data0;
 
 	if (tlb_type == hypervisor)
 		return;
 
 	this_cpu = get_cpu();
 
-	cpu_clear(this_cpu, mask);
-
 #ifdef CONFIG_DEBUG_DCFLUSH
 	atomic_inc(&dcpage_flushes);
 #endif
-	if (cpus_empty(mask))
-		goto flush_self;
+	data0 = 0;
+	pg_addr = page_address(page);
 	if (tlb_type == spitfire) {
 		data0 = ((u64)&xcall_flush_dcache_page_spitfire);
 		if (page_mapping(page) != NULL)
 			data0 |= ((u64)1 << 32);
-		spitfire_xcall_deliver(data0,
-				       __pa(pg_addr),
-				       (u64) pg_addr,
-				       mask);
 	} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
 #ifdef DCACHE_ALIASING_POSSIBLE
 		data0 = ((u64)&xcall_flush_dcache_page_cheetah);
-		cheetah_xcall_deliver(data0,
-				      __pa(pg_addr),
-				      0, mask);
 #endif
 	}
+	if (data0) {
+		xcall_deliver(data0, __pa(pg_addr),
+			      (u64) pg_addr, &cpu_online_map);
 #ifdef CONFIG_DEBUG_DCFLUSH
-	atomic_inc(&dcpage_flushes_xcall);
+		atomic_inc(&dcpage_flushes_xcall);
 #endif
- flush_self:
+	}
 	__local_flush_dcache_page(page);
 
 	put_cpu();
 }
 
-static void __smp_receive_signal_mask(cpumask_t mask)
-{
-	smp_cross_call_masked(&xcall_receive_signal, 0, 0, 0, mask);
-}
-
-void smp_receive_signal(int cpu)
-{
-	cpumask_t mask = cpumask_of_cpu(cpu);
-
-	if (cpu_online(cpu))
-		__smp_receive_signal_mask(mask);
-}
-
-void smp_receive_signal_client(int irq, struct pt_regs *regs)
-{
-	clear_softint(1 << irq);
-}
-
 void smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
 {
 	struct mm_struct *mm;
@@ -1022,11 +1005,6 @@ void kgdb_roundup_cpus(unsigned long flags)
 }
 #endif
 
-void smp_report_regs(void)
-{
-	smp_cross_call(&xcall_report_regs, 0, 0, 0);
-}
-
 #ifdef CONFIG_MAGIC_SYSRQ
 void smp_fetch_global_regs(void)
 {
@@ -1089,7 +1067,7 @@ void smp_flush_tlb_mm(struct mm_struct *mm)
 
 	smp_cross_call_masked(&xcall_flush_tlb_mm,
 			      ctx, 0, 0,
-			      mm->cpu_vm_mask);
+			      &mm->cpu_vm_mask);
 
 local_flush_and_out:
 	__flush_tlb_mm(ctx, SECONDARY_CONTEXT);
@@ -1107,7 +1085,7 @@ void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long
 	else
 		smp_cross_call_masked(&xcall_flush_tlb_pending,
 				      ctx, nr, (unsigned long) vaddrs,
-				      mm->cpu_vm_mask);
+				      &mm->cpu_vm_mask);
 
 	__flush_tlb_pending(ctx, nr, vaddrs);
 
@@ -1208,6 +1186,16 @@ void __devinit smp_prepare_boot_cpu(void)
 {
 }
 
+void __init smp_setup_processor_id(void)
+{
+	if (tlb_type == spitfire)
+		xcall_deliver_impl = spitfire_xcall_deliver;
+	else if (tlb_type == cheetah || tlb_type == cheetah_plus)
+		xcall_deliver_impl = cheetah_xcall_deliver;
+	else
+		xcall_deliver_impl = hypervisor_xcall_deliver;
+}
+
 void __devinit smp_fill_in_sib_core_maps(void)
 {
 	unsigned int i;
@@ -1376,7 +1364,13 @@ void __init smp_cpus_done(unsigned int max_cpus)
 
 void smp_send_reschedule(int cpu)
 {
-	smp_receive_signal(cpu);
+	xcall_deliver((u64) &xcall_receive_signal, 0, 0,
+		      &cpumask_of_cpu(cpu));
+}
+
+void smp_receive_signal_client(int irq, struct pt_regs *regs)
+{
+	clear_softint(1 << irq);
 }
 
 /* This is a nop because we capture all other cpus
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 504e678ee12..0804f71df6c 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -68,7 +68,6 @@ extern void *__memscan_zero(void *, size_t);
 extern void *__memscan_generic(void *, int, size_t);
 extern int __memcmp(const void *, const void *, __kernel_size_t);
 extern __kernel_size_t strlen(const char *);
-extern void show_regs(struct pt_regs *);
 extern void syscall_trace(struct pt_regs *, int);
 extern void sys_sigsuspend(void);
 extern int compat_sys_ioctl(unsigned int fd, unsigned int cmd, u32 arg);
diff --git a/arch/sparc64/kernel/syscalls.S b/arch/sparc64/kernel/syscalls.S
index db19ed67acf..a2f24270ed8 100644
--- a/arch/sparc64/kernel/syscalls.S
+++ b/arch/sparc64/kernel/syscalls.S
@@ -162,6 +162,8 @@ linux_syscall_trace32:
 	add	%sp, PTREGS_OFF, %o0
 	call	syscall_trace
 	 clr	%o1
+	brnz,pn	%o0, 3f
+	 mov	-ENOSYS, %o0
 	srl	%i0, 0, %o0
 	srl	%i4, 0, %o4
 	srl	%i1, 0, %o1
@@ -173,6 +175,8 @@ linux_syscall_trace:
 	add	%sp, PTREGS_OFF, %o0
 	call	syscall_trace
 	 clr	%o1
+	brnz,pn	%o0, 3f
+	 mov	-ENOSYS, %o0
 	mov	%i0, %o0
 	mov	%i1, %o1
 	mov	%i2, %o2
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index bd30ecba563..404e8561e2d 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -1777,7 +1777,7 @@ static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
 	       pfx,
 	       ent->err_raddr, ent->err_size, ent->err_cpu);
 
-	__show_regs(regs);
+	show_regs(regs);
 
 	if ((cnt = atomic_read(ocnt)) != 0) {
 		atomic_set(ocnt, 0);
@@ -2177,7 +2177,6 @@ static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
 void die_if_kernel(char *str, struct pt_regs *regs)
 {
 	static int die_counter;
-	extern void smp_report_regs(void);
 	int count = 0;
 	
 	/* Amuse the user. */
@@ -2190,7 +2189,7 @@ void die_if_kernel(char *str, struct pt_regs *regs)
 	printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
 	notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
 	__asm__ __volatile__("flushw");
-	__show_regs(regs);
+	show_regs(regs);
 	add_taint(TAINT_DIE);
 	if (regs->tstate & TSTATE_PRIV) {
 		struct reg_window *rw = (struct reg_window *)
@@ -2215,11 +2214,6 @@ void die_if_kernel(char *str, struct pt_regs *regs)
 		}
 		user_instruction_dump ((unsigned int __user *) regs->tpc);
 	}
-#if 0
-#ifdef CONFIG_SMP
-	smp_report_regs();
-#endif
-#endif                                                	
 	if (regs->tstate & TSTATE_PRIV)
 		do_exit(SIGKILL);
 	do_exit(SIGSEGV);
diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c
index 3547937b17a..587f8efb2e0 100644
--- a/arch/sparc64/mm/tsb.c
+++ b/arch/sparc64/mm/tsb.c
@@ -1,9 +1,10 @@
 /* arch/sparc64/mm/tsb.c
  *
- * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
+ * Copyright (C) 2006, 2008 David S. Miller <davem@davemloft.net>
  */
 
 #include <linux/kernel.h>
+#include <linux/preempt.h>
 #include <asm/system.h>
 #include <asm/page.h>
 #include <asm/tlbflush.h>
@@ -415,7 +416,9 @@ retry_tsb_alloc:
 		tsb_context_switch(mm);
 
 		/* Now force other processors to do the same.  */
+		preempt_disable();
 		smp_tsb_sync(mm);
+		preempt_enable();
 
 		/* Now it is safe to free the old tsb.  */
 		kmem_cache_free(tsb_caches[old_cache_index], old_tsb);
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S
index 4c8ca131ffa..ff1dc44d363 100644
--- a/arch/sparc64/mm/ultra.S
+++ b/arch/sparc64/mm/ultra.S
@@ -480,41 +480,6 @@ xcall_sync_tick:
 	b		rtrap_xcall
 	 ldx		[%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
 
-	/* NOTE: This is SPECIAL!!  We do etrap/rtrap however
-	 *       we choose to deal with the "BH's run with
-	 *       %pil==15" problem (described in asm/pil.h)
-	 *       by just invoking rtrap directly past where
-	 *       BH's are checked for.
-	 *
-	 *       We do it like this because we do not want %pil==15
-	 *       lockups to prevent regs being reported.
-	 */
-	.globl		xcall_report_regs
-xcall_report_regs:
-
-661:	rdpr		%pstate, %g2
-	wrpr		%g2, PSTATE_IG | PSTATE_AG, %pstate
-	.section	.sun4v_2insn_patch, "ax"
-	.word		661b
-	nop
-	nop
-	.previous
-
-	rdpr		%pil, %g2
-	wrpr		%g0, 15, %pil
-	sethi		%hi(109f), %g7
-	b,pt		%xcc, etrap_irq
-109:	 or		%g7, %lo(109b), %g7
-#ifdef CONFIG_TRACE_IRQFLAGS
-	call		trace_hardirqs_off
-	 nop
-#endif
-	call		__show_regs
-	 add		%sp, PTREGS_OFF, %o0
-	/* Has to be a non-v9 branch due to the large distance. */
-	b		rtrap_xcall
-	 ldx		[%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
-
 #ifdef CONFIG_MAGIC_SYSRQ
 	.globl		xcall_fetch_glob_regs
 xcall_fetch_glob_regs:
@@ -531,6 +496,13 @@ xcall_fetch_glob_regs:
 	stx		%g7, [%g1 + GR_SNAP_TNPC]
 	stx		%o7, [%g1 + GR_SNAP_O7]
 	stx		%i7, [%g1 + GR_SNAP_I7]
+	/* Don't try this at home kids... */
+	rdpr		%cwp, %g2
+	sub		%g2, 1, %g7
+	wrpr		%g7, %cwp
+	mov		%i7, %g7
+	wrpr		%g2, %cwp
+	stx		%g7, [%g1 + GR_SNAP_RPC]
 	sethi		%hi(trap_block), %g7
 	or		%g7, %lo(trap_block), %g7
 	sllx		%g2, TRAP_BLOCK_SZ_SHIFT, %g2