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-rw-r--r--arch/powerpc/include/asm/reg_booke.h2
-rw-r--r--arch/powerpc/kernel/process.c22
2 files changed, 1 insertions, 23 deletions
diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h
index 28cdbd9f399c..03c48e819c8e 100644
--- a/arch/powerpc/include/asm/reg_booke.h
+++ b/arch/powerpc/include/asm/reg_booke.h
@@ -31,7 +31,7 @@
#define MSR_ MSR_ME | MSR_CE
#define MSR_KERNEL MSR_ | MSR_64BIT
-#define MSR_USER32 MSR_ | MSR_PR | MSR_EE | MSR_DE
+#define MSR_USER32 MSR_ | MSR_PR | MSR_EE
#define MSR_USER64 MSR_USER32 | MSR_64BIT
#elif defined (CONFIG_40x)
#define MSR_KERNEL (MSR_ME|MSR_RI|MSR_IR|MSR_DR|MSR_CE)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index ad3612af0a04..6457574c0b2f 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -486,28 +486,6 @@ struct task_struct *__switch_to(struct task_struct *prev,
new_thread = &new->thread;
old_thread = &current->thread;
-#if defined(CONFIG_PPC_BOOK3E_64)
- /* XXX Current Book3E code doesn't deal with kernel side DBCR0,
- * we always hold the user values, so we set it now.
- *
- * However, we ensure the kernel MSR:DE is appropriately cleared too
- * to avoid spurrious single step exceptions in the kernel.
- *
- * This will have to change to merge with the ppc32 code at some point,
- * but I don't like much what ppc32 is doing today so there's some
- * thinking needed there
- */
- if ((new_thread->dbcr0 | old_thread->dbcr0) & DBCR0_IDM) {
- u32 dbcr0;
-
- mtmsr(mfmsr() & ~MSR_DE);
- isync();
- dbcr0 = mfspr(SPRN_DBCR0);
- dbcr0 = (dbcr0 & DBCR0_EDM) | new_thread->dbcr0;
- mtspr(SPRN_DBCR0, dbcr0);
- }
-#endif /* CONFIG_PPC64_BOOK3E */
-
#ifdef CONFIG_PPC64
/*
* Collect processor utilization data per process