4 files changed, 15 insertions, 12 deletions

diff --git a/arch/ppc64/kernel/entry.S b/arch/ppc64/kernel/entry.S
index b61572eb2a71..bf99b4a92f20 100644
--- a/arch/ppc64/kernel/entry.S
+++ b/arch/ppc64/kernel/entry.S
@@ -400,15 +400,14 @@ BEGIN_FTR_SECTION
         cmpd    cr1,r6,r9       /* or is new ESID the same as current ESID? */
         cror    eq,4*cr1+eq,eq
         beq     2f              /* if yes, don't slbie it */
-        oris    r0,r6,0x0800    /* set C (class) bit */
 
         /* Bolt in the new stack SLB entry */
         ld      r7,KSP_VSID(r4) /* Get new stack's VSID */
-        oris    r6,r6,(SLB_ESID_V)@h
-        ori     r6,r6,(SLB_NUM_BOLTED-1)@l
-        slbie   r0
-        slbie   r0              /* Workaround POWER5 < DD2.1 issue */
-        slbmte  r7,r6
+        oris    r0,r6,(SLB_ESID_V)@h
+        ori     r0,r0,(SLB_NUM_BOLTED-1)@l
+        slbie   r6
+        slbie   r6              /* Workaround POWER5 < DD2.1 issue */
+        slbmte  r7,r0
         isync
 
 2:
diff --git a/arch/ppc64/mm/hugetlbpage.c b/arch/ppc64/mm/hugetlbpage.c
index e7833c80eb68..338771ec70d7 100644
--- a/arch/ppc64/mm/hugetlbpage.c
+++ b/arch/ppc64/mm/hugetlbpage.c
@@ -144,7 +144,8 @@ static void flush_low_segments(void *parm)
         for (i = 0; i < NUM_LOW_AREAS; i++) {
                 if (! (areas & (1U << i)))
                         continue;
-                asm volatile("slbie %0" : : "r" (i << SID_SHIFT));
+                asm volatile("slbie %0"
+                             : : "r" ((i << SID_SHIFT) | SLBIE_C));
         }
 
         asm volatile("isync" : : : "memory");
@@ -164,7 +165,8 @@ static void flush_high_segments(void *parm)
                         continue;
                 for (j = 0; j < (1UL << (HTLB_AREA_SHIFT-SID_SHIFT)); j++)
                         asm volatile("slbie %0"
-                                     :: "r" ((i << HTLB_AREA_SHIFT) + (j << SID_SHIFT)));
+                                     :: "r" (((i << HTLB_AREA_SHIFT)
+                                             + (j << SID_SHIFT)) | SLBIE_C));
         }
 
         asm volatile("isync" : : : "memory");
diff --git a/arch/ppc64/mm/slb.c b/arch/ppc64/mm/slb.c
index 244150a0bc18..0473953f6a37 100644
--- a/arch/ppc64/mm/slb.c
+++ b/arch/ppc64/mm/slb.c
@@ -87,8 +87,8 @@ void switch_slb(struct task_struct *tsk, struct mm_struct *mm)
                 int i;
                 asm volatile("isync" : : : "memory");
                 for (i = 0; i < offset; i++) {
-                        esid_data = (unsigned long)get_paca()->slb_cache[i]
-                                << SID_SHIFT;
+                        esid_data = ((unsigned long)get_paca()->slb_cache[i]
+                                << SID_SHIFT) | SLBIE_C;
                         asm volatile("slbie %0" : : "r" (esid_data));
                 }
                 asm volatile("isync" : : : "memory");
diff --git a/include/asm-ppc64/mmu.h b/include/asm-ppc64/mmu.h
index ad36bb28de29..7bc42eb087ad 100644
--- a/include/asm-ppc64/mmu.h
+++ b/include/asm-ppc64/mmu.h
@@ -54,8 +54,10 @@ extern char initial_stab[];
 #define SLB_VSID_C              ASM_CONST(0x0000000000000080) /* class */
 #define SLB_VSID_LS             ASM_CONST(0x0000000000000070) /* size of largepage */
  
-#define SLB_VSID_KERNEL         (SLB_VSID_KP|SLB_VSID_C)
-#define SLB_VSID_USER           (SLB_VSID_KP|SLB_VSID_KS)
+#define SLB_VSID_KERNEL         (SLB_VSID_KP)
+#define SLB_VSID_USER           (SLB_VSID_KP|SLB_VSID_KS|SLB_VSID_C)
+
+#define SLBIE_C                 (0x08000000)
 
 /*
  * Hash table