powerpc: Remove unused paca->pgdir field

The pgdir field in the paca was a leftover from the dynamic VSIDs
patch, and is not used in the current kernel code.  This removes it.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 12 deletions

diff --git a/include/asm-powerpc/mmu_context.h b/include/asm-powerpc/mmu_context.h
index 1b8a25fd48f..8c6b1a6d944 100644
--- a/include/asm-powerpc/mmu_context.h
+++ b/include/asm-powerpc/mmu_context.h
@@ -20,16 +20,9 @@
  * 2 of the License, or (at your option) any later version.
  */
 
-/*
- * Getting into a kernel thread, there is no valid user segment, mark
- * paca->pgdir NULL so that SLB miss on user addresses will fault
- */
 static inline void enter_lazy_tlb(struct mm_struct *mm,
                                   struct task_struct *tsk)
 {
-#ifdef CONFIG_PPC_64K_PAGES
-        get_paca()->pgdir = NULL;
-#endif /* CONFIG_PPC_64K_PAGES */
 }
 
 #define NO_CONTEXT      0
@@ -52,13 +45,8 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
                 cpu_set(smp_processor_id(), next->cpu_vm_mask);
 
         /* No need to flush userspace segments if the mm doesnt change */
-#ifdef CONFIG_PPC_64K_PAGES
-        if (prev == next && get_paca()->pgdir == next->pgd)
-                return;
-#else
         if (prev == next)
                 return;
-#endif /* CONFIG_PPC_64K_PAGES */
 
 #ifdef CONFIG_ALTIVEC
         if (cpu_has_feature(CPU_FTR_ALTIVEC))