4 files changed, 25 insertions, 14 deletions

diff --git a/arch/ppc/kernel/head_44x.S b/arch/ppc/kernel/head_44x.S
index 9b6a8e513657..6c7ae6052464 100644
--- a/arch/ppc/kernel/head_44x.S
+++ b/arch/ppc/kernel/head_44x.S
@@ -330,8 +330,9 @@ interrupt_base:
         /* If we are faulting a kernel address, we have to use the
          * kernel page tables.
          */
-        andis.  r11, r10, 0x8000
-        beq     3f
+        lis     r11, TASK_SIZE@h
+        cmplw   r10, r11
+        blt+    3f
         lis     r11, swapper_pg_dir@h
         ori     r11, r11, swapper_pg_dir@l
 
@@ -464,8 +465,9 @@ interrupt_base:
         /* If we are faulting a kernel address, we have to use the
          * kernel page tables.
          */
-        andis.  r11, r10, 0x8000
-        beq     3f
+        lis     r11, TASK_SIZE@h
+        cmplw   r10, r11
+        blt+    3f
         lis     r11, swapper_pg_dir@h
         ori     r11, r11, swapper_pg_dir@l
 
@@ -533,8 +535,9 @@ interrupt_base:
         /* If we are faulting a kernel address, we have to use the
          * kernel page tables.
          */
-        andis.  r11, r10, 0x8000
-        beq     3f
+        lis     r11, TASK_SIZE@h
+        cmplw   r10, r11
+        blt+    3f
         lis     r11, swapper_pg_dir@h
         ori     r11, r11, swapper_pg_dir@l
 
diff --git a/arch/ppc/kernel/head_fsl_booke.S b/arch/ppc/kernel/head_fsl_booke.S
index f22ddce36135..ce36e88ba627 100644
--- a/arch/ppc/kernel/head_fsl_booke.S
+++ b/arch/ppc/kernel/head_fsl_booke.S
@@ -232,7 +232,8 @@ skpinv:	addi	r6,r6,1				/* Increment */
         tlbwe
 
 /* 7. Jump to KERNELBASE mapping */
-        li      r7,0
+        lis     r7,MSR_KERNEL@h
+        ori     r7,r7,MSR_KERNEL@l
         bl      1f                      /* Find our address */
 1:      mflr    r9
         rlwimi  r6,r9,0,20,31
@@ -293,6 +294,18 @@ skpinv:	addi	r6,r6,1				/* Increment */
         mtspr   SPRN_HID0, r2
 #endif
 
+#if !defined(CONFIG_BDI_SWITCH)
+        /*
+         * The Abatron BDI JTAG debugger does not tolerate others
+         * mucking with the debug registers.
+         */
+        lis     r2,DBCR0_IDM@h
+        mtspr   SPRN_DBCR0,r2
+        /* clear any residual debug events */
+        li      r2,-1
+        mtspr   SPRN_DBSR,r2
+#endif
+
         /*
          * This is where the main kernel code starts.
          */
diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index 309797d7f96d..5c20266e3b1f 100644
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -499,7 +499,7 @@ static int __init set_preferred_console(void)
 {
         struct device_node *prom_stdout;
         char *name;
-        int offset;
+        int offset = 0;
 
         if (of_stdout_device == NULL)
                 return -ENODEV;
diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
index f8e7e324a173..c65731e8bc65 100644
--- a/arch/ppc/kernel/traps.c
+++ b/arch/ppc/kernel/traps.c
@@ -408,12 +408,7 @@ static int emulate_string_inst(struct pt_regs *regs, u32 instword)
 
         /* Early out if we are an invalid form of lswx */
         if ((instword & INST_STRING_MASK) == INST_LSWX)
-                if ((rA >= rT) || (NB_RB >= rT) || (rT == rA) || (rT == NB_RB))
-                        return -EINVAL;
-
-        /* Early out if we are an invalid form of lswi */
-        if ((instword & INST_STRING_MASK) == INST_LSWI)
-                if ((rA >= rT) || (rT == rA))
+                if ((rT == rA) || (rT == NB_RB))
                         return -EINVAL;
 
         EA = (rA == 0) ? 0 : regs->gpr[rA];