Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux…

…-2.6.git

Makefile

@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 12
-EXTRAVERSION =-rc3
+EXTRAVERSION =-rc4
 NAME=Woozy Numbat
 
 # *DOCUMENTATION*

arch/i386/kernel/acpi/boot.c

@@ -650,7 +650,7 @@ acpi_find_rsdp (void)
 	 */
 	rsdp_phys = acpi_scan_rsdp (0, 0x400);
 	if (!rsdp_phys)
-		rsdp_phys = acpi_scan_rsdp (0xE0000, 0xFFFFF);
+		rsdp_phys = acpi_scan_rsdp (0xE0000, 0x20000);
 
 	return rsdp_phys;
 }

arch/ppc/Kconfig

@@ -77,9 +77,11 @@ config 44x
 	bool "44x"
 
 config POWER3
+	select PPC_FPU
 	bool "POWER3"
 
 config POWER4
+	select PPC_FPU
 	bool "POWER4 and 970 (G5)"
 
 config 8xx

arch/ppc64/Kconfig

@@ -262,6 +262,7 @@ config PPC_RTAS
 config RTAS_PROC
 	bool "Proc interface to RTAS"
 	depends on PPC_RTAS
+	default y
 
 config RTAS_FLASH
 	tristate "Firmware flash interface"

arch/ppc64/kernel/pSeries_smp.c

@@ -326,13 +326,6 @@ static void __devinit smp_xics_setup_cpu(int cpu)
 
 	cpu_clear(cpu, of_spin_map);
 
-	/*
-	 * Put the calling processor into the GIQ.  This is really only
-	 * necessary from a secondary thread as the OF start-cpu interface
-	 * performs this function for us on primary threads.
-	 */
-	rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
-		(1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
 }
 
 static DEFINE_SPINLOCK(timebase_lock);

arch/ppc64/kernel/xics.c

@@ -432,16 +432,25 @@ void xics_cause_IPI(int cpu)
 {
 	ops->qirr_info(cpu, IPI_PRIORITY);
 }
+#endif /* CONFIG_SMP */
 
 void xics_setup_cpu(void)
 {
 	int cpu = smp_processor_id();
 
 	ops->cppr_info(cpu, 0xff);
 	iosync();
-}
 
-#endif /* CONFIG_SMP */
+	/*
+	 * Put the calling processor into the GIQ.  This is really only
+	 * necessary from a secondary thread as the OF start-cpu interface
+	 * performs this function for us on primary threads.
+	 *
+	 * XXX: undo of teardown on kexec needs this too, as may hotplug
+	 */
+	rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+		(1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
+}
 
 void xics_init_IRQ(void)
 {
@@ -563,8 +572,7 @@ void xics_init_IRQ(void)
 	for (; i < NR_IRQS; ++i)
 		get_irq_desc(i)->handler = &xics_pic;
 
-	ops->cppr_info(boot_cpuid, 0xff);
-	iosync();
+	xics_setup_cpu();
 
 	ppc64_boot_msg(0x21, "XICS Done");
 }

arch/um/include/user_util.h

@@ -67,7 +67,6 @@ extern void *um_kmalloc(int size);
 extern int switcheroo(int fd, int prot, void *from, void *to, int size);
 extern void setup_machinename(char *machine_out);
 extern void setup_hostinfo(void);
-extern void add_arg(char *arg);
 extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
 extern void init_new_thread_signals(int altstack);
 extern void do_exec(int old_pid, int new_pid);

arch/um/kernel/Makefile

@@ -23,14 +23,10 @@ obj-$(CONFIG_SYSCALL_DEBUG) += syscall_user.o
 obj-$(CONFIG_MODE_TT) += tt/
 obj-$(CONFIG_MODE_SKAS) += skas/
 
-# This needs be compiled with frame pointers regardless of how the rest of the
-# kernel is built.
-CFLAGS_frame.o := -fno-omit-frame-pointer
-
 user-objs-$(CONFIG_TTY_LOG) += tty_log.o
 
 USER_OBJS := $(user-objs-y) config.o helper.o main.o process.o tempfile.o \
-	time.o tty_log.o umid.o user_util.o frame.o
+	time.o tty_log.o umid.o user_util.o
 
 include arch/um/scripts/Makefile.rules
 

arch/um/kernel/process_kern.c

@@ -115,16 +115,6 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 	return(pid);
 }
 
-void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
-	       struct task_struct *tsk)
-{
-	int cpu = smp_processor_id();
-
-	if (prev != next) 
-		cpu_clear(cpu, prev->cpu_vm_mask);
-	cpu_set(cpu, next->cpu_vm_mask);
-}
-
 void set_current(void *t)
 {
 	struct task_struct *task = t;
@@ -152,7 +142,6 @@ void release_thread(struct task_struct *task)
 
 void exit_thread(void)
 {
-	CHOOSE_MODE(exit_thread_tt(), exit_thread_skas());
 	unprotect_stack((unsigned long) current_thread);
 }
 
@@ -476,12 +465,21 @@ int singlestepping(void * t)
 	return 2;
 }
 
+/*
+ * Only x86 and x86_64 have an arch_align_stack().
+ * All other arches have "#define arch_align_stack(x) (x)"
+ * in their asm/system.h
+ * As this is included in UML from asm-um/system-generic.h,
+ * we can use it to behave as the subarch does.
+ */
+#ifndef arch_align_stack
 unsigned long arch_align_stack(unsigned long sp)
 {
 	if (randomize_va_space)
 		sp -= get_random_int() % 8192;
 	return sp & ~0xf;
 }
+#endif
 
 
 /*

arch/um/kernel/ptrace.c

@@ -19,15 +19,30 @@
 #include "skas_ptrace.h"
 #include "sysdep/ptrace.h"
 
+static inline void set_singlestepping(struct task_struct *child, int on)
+{
+        if (on)
+                child->ptrace |= PT_DTRACE;
+        else
+                child->ptrace &= ~PT_DTRACE;
+        child->thread.singlestep_syscall = 0;
+
+#ifdef SUBARCH_SET_SINGLESTEPPING
+        SUBARCH_SET_SINGLESTEPPING(child, on)
+#endif
+                }
+
 /*
  * Called by kernel/ptrace.c when detaching..
  */
 void ptrace_disable(struct task_struct *child)
 { 
-	child->ptrace &= ~PT_DTRACE;
-	child->thread.singlestep_syscall = 0;
+        set_singlestepping(child,0);
 }
 
+extern int peek_user(struct task_struct * child, long addr, long data);
+extern int poke_user(struct task_struct * child, long addr, long data);
+
 long sys_ptrace(long request, long pid, long addr, long data)
 {
 	struct task_struct *child;
@@ -67,6 +82,10 @@ long sys_ptrace(long request, long pid, long addr, long data)
 		goto out_tsk;
 	}
 
+#ifdef SUBACH_PTRACE_SPECIAL
+        SUBARCH_PTRACE_SPECIAL(child,request,addr,data)
+#endif
+
 	ret = ptrace_check_attach(child, request == PTRACE_KILL);
 	if (ret < 0)
 		goto out_tsk;
@@ -87,28 +106,9 @@ long sys_ptrace(long request, long pid, long addr, long data)
 	}
 
 	/* read the word at location addr in the USER area. */
-	case PTRACE_PEEKUSR: {
-		unsigned long tmp;
-
-		ret = -EIO;
-		if ((addr & 3) || addr < 0) 
-			break;
-
-		tmp = 0;  /* Default return condition */
-		if(addr < MAX_REG_OFFSET){
-			tmp = getreg(child, addr);
-		}
-#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
-		else if((addr >= offsetof(struct user, u_debugreg[0])) &&
-			(addr <= offsetof(struct user, u_debugreg[7]))){
-			addr -= offsetof(struct user, u_debugreg[0]);
-			addr = addr >> 2;
-			tmp = child->thread.arch.debugregs[addr];
-		}
-#endif
-		ret = put_user(tmp, (unsigned long __user *) data);
-		break;
-	}
+        case PTRACE_PEEKUSR:
+                ret = peek_user(child, addr, data);
+                break;
 
 	/* when I and D space are separate, this will have to be fixed. */
 	case PTRACE_POKETEXT: /* write the word at location addr. */
@@ -121,35 +121,16 @@ long sys_ptrace(long request, long pid, long addr, long data)
 		break;
 
 	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
-		ret = -EIO;
-		if ((addr & 3) || addr < 0)
-			break;
-
-		if (addr < MAX_REG_OFFSET) {
-			ret = putreg(child, addr, data);
-			break;
-		}
-#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
-		else if((addr >= offsetof(struct user, u_debugreg[0])) &&
-			(addr <= offsetof(struct user, u_debugreg[7]))){
-			  addr -= offsetof(struct user, u_debugreg[0]);
-			  addr = addr >> 2;
-			  if((addr == 4) || (addr == 5)) break;
-			  child->thread.arch.debugregs[addr] = data;
-			  ret = 0;
-		}
-#endif
-
-		break;
+                ret = poke_user(child, addr, data);
+                break;
 
 	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
 	case PTRACE_CONT: { /* restart after signal. */
 		ret = -EIO;
 		if (!valid_signal(data))
 			break;
 
-		child->ptrace &= ~PT_DTRACE;
-		child->thread.singlestep_syscall = 0;
+                set_singlestepping(child, 0);
 		if (request == PTRACE_SYSCALL) {
 			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		}
@@ -172,8 +153,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
 		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
 			break;
 
-		child->ptrace &= ~PT_DTRACE;
-		child->thread.singlestep_syscall = 0;
+                set_singlestepping(child, 0);
 		child->exit_code = SIGKILL;
 		wake_up_process(child);
 		break;
@@ -184,8 +164,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
 		if (!valid_signal(data))
 			break;
 		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		child->ptrace |= PT_DTRACE;
-		child->thread.singlestep_syscall = 0;
+                set_singlestepping(child, 1);
 		child->exit_code = data;
 		/* give it a chance to run. */
 		wake_up_process(child);

arch/um/kernel/skas/include/mode_kern-skas.h

@@ -18,7 +18,6 @@ extern int copy_thread_skas(int nr, unsigned long clone_flags,
 			    unsigned long sp, unsigned long stack_top,
 			    struct task_struct *p, struct pt_regs *regs);
 extern void release_thread_skas(struct task_struct *task);
-extern void exit_thread_skas(void);
 extern void initial_thread_cb_skas(void (*proc)(void *), void *arg);
 extern void init_idle_skas(void);
 extern void flush_tlb_kernel_range_skas(unsigned long start,

arch/um/kernel/skas/include/uaccess-skas.h

@@ -18,8 +18,8 @@
 	  ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
 	  ((unsigned long) (addr) + (size) >= (unsigned long)(addr))))
 
-static inline int __deprecated verify_area_skas(int type, const void * addr,
-				   unsigned long size)
+static inline int verify_area_skas(int type, const void * addr,
+                                   unsigned long size)
 {
 	return(access_ok_skas(type, addr, size) ? 0 : -EFAULT);
 }

arch/um/kernel/skas/process.c

@@ -201,6 +201,11 @@ void userspace(union uml_pt_regs *regs)
 		}
 	}
 }
+#define INIT_JMP_NEW_THREAD 0
+#define INIT_JMP_REMOVE_SIGSTACK 1
+#define INIT_JMP_CALLBACK 2
+#define INIT_JMP_HALT 3
+#define INIT_JMP_REBOOT 4
 
 void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
 		void (*handler)(int))
@@ -236,7 +241,7 @@ void thread_wait(void *sw, void *fb)
 	*switch_buf = &buf;
 	fork_buf = fb;
 	if(sigsetjmp(buf, 1) == 0)
-		siglongjmp(*fork_buf, 1);
+		siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK);
 }
 
 void switch_threads(void *me, void *next)
@@ -266,21 +271,25 @@ int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
 
 	*fork_buf_ptr = &initial_jmpbuf;
 	n = sigsetjmp(initial_jmpbuf, 1);
-	if(n == 0)
-		new_thread_proc((void *) stack, new_thread_handler);
-	else if(n == 1)
-		remove_sigstack();
-	else if(n == 2){
+        switch(n){
+        case INIT_JMP_NEW_THREAD:
+                new_thread_proc((void *) stack, new_thread_handler);
+                break;
+        case INIT_JMP_REMOVE_SIGSTACK:
+                remove_sigstack();
+                break;
+        case INIT_JMP_CALLBACK:
 		(*cb_proc)(cb_arg);
 		siglongjmp(*cb_back, 1);
-	}
-	else if(n == 3){
+                break;
+        case INIT_JMP_HALT:
 		kmalloc_ok = 0;
 		return(0);
-	}
-	else if(n == 4){
+        case INIT_JMP_REBOOT:
 		kmalloc_ok = 0;
 		return(1);
+        default:
+                panic("Bad sigsetjmp return in start_idle_thread - %d\n", n);
 	}
 	siglongjmp(**switch_buf, 1);
 }
@@ -305,7 +314,7 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg)
 
 	block_signals();
 	if(sigsetjmp(here, 1) == 0)
-		siglongjmp(initial_jmpbuf, 2);
+		siglongjmp(initial_jmpbuf, INIT_JMP_CALLBACK);
 	unblock_signals();
 
 	cb_proc = NULL;
@@ -316,13 +325,13 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg)
 void halt_skas(void)
 {
 	block_signals();
-	siglongjmp(initial_jmpbuf, 3);
+	siglongjmp(initial_jmpbuf, INIT_JMP_HALT);
 }
 
 void reboot_skas(void)
 {
 	block_signals();
-	siglongjmp(initial_jmpbuf, 4);
+	siglongjmp(initial_jmpbuf, INIT_JMP_REBOOT);
 }
 
 void switch_mm_skas(int mm_fd)