Merge with /usr/src/ntfs-2.6.git

6 files changed, 31 insertions, 30 deletions

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 080df907f24..4eb36155dc9 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -17,8 +17,8 @@
 
 #include <asm/glue.h>
 #include <asm/vfpmacros.h>
-#include <asm/hardware.h>		@ should be moved into entry-macro.S
-#include <asm/arch/irqs.h>		@ should be moved into entry-macro.S
+#include <asm/hardware.h>		/* should be moved into entry-macro.S */
+#include <asm/arch/irqs.h>		/* should be moved into entry-macro.S */
 #include <asm/arch/entry-macro.S>
 
 #include "entry-header.S"
@@ -505,9 +505,9 @@ ENTRY(__switch_to)
 	mra	r4, r5, acc0
 	stmia   ip, {r4, r5}
 #endif
-#ifdef CONFIG_HAS_TLS_REG
+#if defined(CONFIG_HAS_TLS_REG)
 	mcr	p15, 0, r3, c13, c0, 3		@ set TLS register
-#else
+#elif !defined(CONFIG_TLS_REG_EMUL)
 	mov	r4, #0xffff0fff
 	str	r3, [r4, #-15]			@ TLS val at 0xffff0ff0
 #endif
@@ -690,11 +690,7 @@ __kuser_cmpxchg:				@ 0xffff0fc0
 
 __kuser_get_tls:				@ 0xffff0fe0
 
-#ifndef CONFIG_HAS_TLS_REG
-
-#ifdef CONFIG_SMP  /* sanity check */
-#error "CONFIG_SMP without CONFIG_HAS_TLS_REG is wrong"
-#endif
+#if !defined(CONFIG_HAS_TLS_REG) && !defined(CONFIG_TLS_REG_EMUL)
 
 	ldr	r0, [pc, #(16 - 8)]		@ TLS stored at 0xffff0ff0
 	mov	pc, lr
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 171b3e811c7..4733877296d 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -19,6 +19,7 @@
 #include <asm/procinfo.h>
 #include <asm/ptrace.h>
 #include <asm/constants.h>
+#include <asm/thread_info.h>
 #include <asm/system.h>
 
 #define PROCINFO_MMUFLAGS	8
@@ -131,7 +132,7 @@ __switch_data:
 	.long	processor_id			@ r4
 	.long	__machine_arch_type		@ r5
 	.long	cr_alignment			@ r6
-	.long	init_thread_union+8192		@ sp
+	.long	init_thread_union + THREAD_START_SP @ sp
 
 /*
  * The following fragment of code is executed with the MMU on, and uses
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 26eacd3e5de..8f146a4b475 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -256,8 +256,6 @@ static unsigned long *thread_info_head;
 static unsigned int nr_thread_info;
 
 #define EXTRA_TASK_STRUCT	4
-#define ll_alloc_task_struct() ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
-#define ll_free_task_struct(p) free_pages((unsigned long)(p),1)
 
 struct thread_info *alloc_thread_info(struct task_struct *task)
 {
@@ -274,17 +272,16 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
 	}
 
 	if (!thread)
-		thread = ll_alloc_task_struct();
+		thread = (struct thread_info *)
+			   __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
 
-#ifdef CONFIG_MAGIC_SYSRQ
+#ifdef CONFIG_DEBUG_STACK_USAGE
 	/*
 	 * The stack must be cleared if you want SYSRQ-T to
 	 * give sensible stack usage information
 	 */
-	if (thread) {
-		char *p = (char *)thread;
-		memzero(p+KERNEL_STACK_SIZE, KERNEL_STACK_SIZE);
-	}
+	if (thread)
+		memzero(thread, THREAD_SIZE);
 #endif
 	return thread;
 }
@@ -297,7 +294,7 @@ void free_thread_info(struct thread_info *thread)
 		thread_info_head = p;
 		nr_thread_info += 1;
 	} else
-		ll_free_task_struct(thread);
+		free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
 }
 
 /*
@@ -350,7 +347,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
 	struct thread_info *thread = p->thread_info;
 	struct pt_regs *childregs;
 
-	childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_SIZE - 8)) - 1;
+	childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_START_SP)) - 1;
 	*childregs = *regs;
 	childregs->ARM_r0 = 0;
 	childregs->ARM_sp = stack_start;
@@ -447,15 +444,17 @@ EXPORT_SYMBOL(kernel_thread);
 unsigned long get_wchan(struct task_struct *p)
 {
 	unsigned long fp, lr;
-	unsigned long stack_page;
+	unsigned long stack_start, stack_end;
 	int count = 0;
 	if (!p || p == current || p->state == TASK_RUNNING)
 		return 0;
 
-	stack_page = 4096 + (unsigned long)p->thread_info;
+	stack_start = (unsigned long)(p->thread_info + 1);
+	stack_end = ((unsigned long)p->thread_info) + THREAD_SIZE;
+
 	fp = thread_saved_fp(p);
 	do {
-		if (fp < stack_page || fp > 4092+stack_page)
+		if (fp < stack_start || fp > stack_end)
 			return 0;
 		lr = pc_pointer (((unsigned long *)fp)[-1]);
 		if (!in_sched_functions(lr))
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index ef32577da30..f897ce2ccf0 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -302,7 +302,7 @@ long execve(const char *filename, char **argv, char **envp)
 		"b	ret_to_user"
 		:
 		: "r" (current_thread_info()),
-		  "Ir" (THREAD_SIZE - 8 - sizeof(regs)),
+		  "Ir" (THREAD_START_SP - sizeof(regs)),
 		  "r" (&regs),
 		  "Ir" (sizeof(regs))
 		: "r0", "r1", "r2", "r3", "ip", "memory");
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 3a001fe5540..14df16b983f 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -218,7 +218,8 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
 		tsk->comm, tsk->pid, tsk->thread_info + 1);
 
 	if (!user_mode(regs) || in_interrupt()) {
-		dump_mem("Stack: ", regs->ARM_sp, 8192+(unsigned long)tsk->thread_info);
+		dump_mem("Stack: ", regs->ARM_sp,
+			 THREAD_SIZE + (unsigned long)tsk->thread_info);
 		dump_backtrace(regs, tsk);
 		dump_instr(regs);
 	}
@@ -450,9 +451,9 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 
 	case NR(set_tls):
 		thread->tp_value = regs->ARM_r0;
-#ifdef CONFIG_HAS_TLS_REG
+#if defined(CONFIG_HAS_TLS_REG)
 		asm ("mcr p15, 0, %0, c13, c0, 3" : : "r" (regs->ARM_r0) );
-#else
+#elif !defined(CONFIG_TLS_REG_EMUL)
 		/*
 		 * User space must never try to access this directly.
 		 * Expect your app to break eventually if you do so.
@@ -497,11 +498,14 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 	return 0;
 }
 
-#if defined(CONFIG_CPU_32v6) && !defined(CONFIG_HAS_TLS_REG)
+#ifdef CONFIG_TLS_REG_EMUL
 
 /*
  * We might be running on an ARMv6+ processor which should have the TLS
- * register, but for some reason we can't use it and have to emulate it.
+ * register but for some reason we can't use it, or maybe an SMP system
+ * using a pre-ARMv6 processor (there are apparently a few prototypes like
+ * that in existence) and therefore access to that register must be
+ * emulated.
  */
 
 static int get_tp_trap(struct pt_regs *regs, unsigned int instr)
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index a39c6a42d68..ad2d66c93a5 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -5,6 +5,7 @@
 
 #include <asm-generic/vmlinux.lds.h>
 #include <linux/config.h>
+#include <asm/thread_info.h>
 	
 OUTPUT_ARCH(arm)
 ENTRY(stext)
@@ -103,7 +104,7 @@ SECTIONS
 	__data_loc = ALIGN(4);		/* location in binary */
 	. = DATAADDR;
 #else
-	. = ALIGN(8192);
+	. = ALIGN(THREAD_SIZE);
 	__data_loc = .;
 #endif