Merge tag 'v3.10-rc1' into stable/for-linus-3.10

Linux 3.10-rc1

* tag 'v3.10-rc1': (12273 commits)
  Linux 3.10-rc1
  [SCSI] qla2xxx: Update firmware link in Kconfig file.
  [SCSI] iscsi class, qla4xxx: fix sess/conn refcounting when find fns are used
  [SCSI] sas: unify the pointlessly separated enums sas_dev_type and sas_device_type
  [SCSI] pm80xx: thermal, sas controller config and error handling update
  [SCSI] pm80xx: NCQ error handling changes
  [SCSI] pm80xx: WWN Modification for PM8081/88/89 controllers
  [SCSI] pm80xx: Changed module name and debug messages update
  [SCSI] pm80xx: Firmware flash memory free fix, with addition of new memory region for it
  [SCSI] pm80xx: SPC new firmware changes for device id 0x8081 alone
  [SCSI] pm80xx: Added SPCv/ve specific hardware functionalities and relevant changes in common files
  [SCSI] pm80xx: MSI-X implementation for using 64 interrupts
  [SCSI] pm80xx: Updated common functions common for SPC and SPCv/ve
  [SCSI] pm80xx: Multiple inbound/outbound queue configuration
  [SCSI] pm80xx: Added SPCv/ve specific ids, variables and modify for SPC
  [SCSI] lpfc: fix up Kconfig dependencies
  [SCSI] Handle MLQUEUE busy response in scsi_send_eh_cmnd
  dm cache: set config value
  dm cache: move config fns
  dm thin: generate event when metadata threshold passed
  ...

1 files changed, 20 insertions, 11 deletions

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index f9b30c68ba4..3b14d320e69 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -180,9 +180,10 @@ static int set_user_msr(struct task_struct *task, unsigned long msr)
 }
 
 #ifdef CONFIG_PPC64
-static unsigned long get_user_dscr(struct task_struct *task)
+static int get_user_dscr(struct task_struct *task, unsigned long *data)
 {
-	return task->thread.dscr;
+	*data = task->thread.dscr;
+	return 0;
 }
 
 static int set_user_dscr(struct task_struct *task, unsigned long dscr)
@@ -192,7 +193,7 @@ static int set_user_dscr(struct task_struct *task, unsigned long dscr)
 	return 0;
 }
 #else
-static unsigned long get_user_dscr(struct task_struct *task)
+static int get_user_dscr(struct task_struct *task, unsigned long *data)
 {
 	return -EIO;
 }
@@ -216,19 +217,23 @@ static int set_user_trap(struct task_struct *task, unsigned long trap)
 /*
  * Get contents of register REGNO in task TASK.
  */
-unsigned long ptrace_get_reg(struct task_struct *task, int regno)
+int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data)
 {
-	if (task->thread.regs == NULL)
+	if ((task->thread.regs == NULL) || !data)
 		return -EIO;
 
-	if (regno == PT_MSR)
-		return get_user_msr(task);
+	if (regno == PT_MSR) {
+		*data = get_user_msr(task);
+		return 0;
+	}
 
 	if (regno == PT_DSCR)
-		return get_user_dscr(task);
+		return get_user_dscr(task, data);
 
-	if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long)))
-		return ((unsigned long *)task->thread.regs)[regno];
+	if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long))) {
+		*data = ((unsigned long *)task->thread.regs)[regno];
+		return 0;
+	}
 
 	return -EIO;
 }
@@ -1560,7 +1565,9 @@ long arch_ptrace(struct task_struct *child, long request,
 
 		CHECK_FULL_REGS(child->thread.regs);
 		if (index < PT_FPR0) {
-			tmp = ptrace_get_reg(child, (int) index);
+			ret = ptrace_get_reg(child, (int) index, &tmp);
+			if (ret)
+				break;
 		} else {
 			unsigned int fpidx = index - PT_FPR0;
 
@@ -1637,6 +1644,8 @@ long arch_ptrace(struct task_struct *child, long request,
 		dbginfo.sizeof_condition = 0;
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
 		dbginfo.features = PPC_DEBUG_FEATURE_DATA_BP_RANGE;
+		if (cpu_has_feature(CPU_FTR_DAWR))
+			dbginfo.features |= PPC_DEBUG_FEATURE_DATA_BP_DAWR;
 #else
 		dbginfo.features = 0;
 #endif /* CONFIG_HAVE_HW_BREAKPOINT */