Revert to 3.8 (no rt, no stable)

This is a merge from rtmerge, which has been similarly reverted.

Conflicts:
	drivers/crypto/caam/caamalg.c
	drivers/misc/Makefile

7 files changed, 44 insertions, 47 deletions

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 66fdd82..3a8489a 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -259,7 +259,7 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
 	if (!arch_irq_disabled_regs(regs))
 		local_irq_enable();
 
-	if (!mm || pagefault_disabled()) {
+	if (in_atomic() || mm == NULL) {
 		if (!user_mode(regs))
 			return SIGSEGV;
 		/* in_atomic() in user mode is really bad,
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 004630b..3a292be 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -194,11 +194,6 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
 		unsigned long vpn  = hpt_vpn(vaddr, vsid, ssize);
 		unsigned long tprot = prot;
 
-		/*
-		 * If we hit a bad address return error.
-		 */
-		if (!vsid)
-			return -1;
 		/* Make kernel text executable */
 		if (overlaps_kernel_text(vaddr, vaddr + step))
 			tprot &= ~HPTE_R_N;
@@ -763,8 +758,6 @@ void __init early_init_mmu(void)
 	/* Initialize stab / SLB management */
 	if (mmu_has_feature(MMU_FTR_SLB))
 		slb_initialize();
-	else
-		stab_initialize(get_paca()->stab_real);
 }
 
 #ifdef CONFIG_SMP
@@ -928,6 +921,11 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap)
 	DBG_LOW("hash_page(ea=%016lx, access=%lx, trap=%lx\n",
 		ea, access, trap);
 
+	if ((ea & ~REGION_MASK) >= PGTABLE_RANGE) {
+		DBG_LOW(" out of pgtable range !\n");
+ 		return 1;
+	}
+
 	/* Get region & vsid */
  	switch (REGION_ID(ea)) {
 	case USER_REGION_ID:
@@ -958,11 +956,6 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap)
 	}
 	DBG_LOW(" mm=%p, mm->pgdir=%p, vsid=%016lx\n", mm, mm->pgd, vsid);
 
-	/* Bad address. */
-	if (!vsid) {
-		DBG_LOW("Bad address!\n");
-		return 1;
-	}
 	/* Get pgdir */
 	pgdir = mm->pgd;
 	if (pgdir == NULL)
@@ -1132,8 +1125,6 @@ void hash_preload(struct mm_struct *mm, unsigned long ea,
 	/* Get VSID */
 	ssize = user_segment_size(ea);
 	vsid = get_vsid(mm->context.id, ea, ssize);
-	if (!vsid)
-		return;
 
 	/* Hash doesn't like irqs */
 	local_irq_save(flags);
@@ -1226,9 +1217,6 @@ static void kernel_map_linear_page(unsigned long vaddr, unsigned long lmi)
 	hash = hpt_hash(vpn, PAGE_SHIFT, mmu_kernel_ssize);
 	hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP);
 
-	/* Don't create HPTE entries for bad address */
-	if (!vsid)
-		return;
 	ret = ppc_md.hpte_insert(hpteg, vpn, __pa(vaddr),
 				 mode, HPTE_V_BOLTED,
 				 mmu_linear_psize, mmu_kernel_ssize);
diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index d1d1b92..40bc5b0 100644
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -29,6 +29,15 @@
 static DEFINE_SPINLOCK(mmu_context_lock);
 static DEFINE_IDA(mmu_context_ida);
 
+/*
+ * 256MB segment
+ * The proto-VSID space has 2^(CONTEX_BITS + USER_ESID_BITS) - 1 segments
+ * available for user mappings. Each segment contains 2^28 bytes. Each
+ * context maps 2^46 bytes (64TB) so we can support 2^19-1 contexts
+ * (19 == 37 + 28 - 46).
+ */
+#define MAX_CONTEXT	((1UL << CONTEXT_BITS) - 1)
+
 int __init_new_context(void)
 {
 	int index;
@@ -47,7 +56,7 @@ again:
 	else if (err)
 		return err;
 
-	if (index > MAX_USER_CONTEXT) {
+	if (index > MAX_CONTEXT) {
 		spin_lock(&mmu_context_lock);
 		ida_remove(&mmu_context_ida, index);
 		spin_unlock(&mmu_context_lock);
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 6a252c4..bba87ca 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -201,7 +201,7 @@ int __node_distance(int a, int b)
 	int distance = LOCAL_DISTANCE;
 
 	if (!form1_affinity)
-		return ((a == b) ? LOCAL_DISTANCE : REMOTE_DISTANCE);
+		return distance;
 
 	for (i = 0; i < distance_ref_points_depth; i++) {
 		if (distance_lookup_table[a][i] == distance_lookup_table[b][i])
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 654258f..e212a27 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -61,7 +61,7 @@
 #endif
 
 #ifdef CONFIG_PPC_STD_MMU_64
-#if TASK_SIZE_USER64 > (1UL << (ESID_BITS + SID_SHIFT))
+#if TASK_SIZE_USER64 > (1UL << (USER_ESID_BITS + SID_SHIFT))
 #error TASK_SIZE_USER64 exceeds user VSID range
 #endif
 #endif
diff --git a/arch/powerpc/mm/slb_low.S b/arch/powerpc/mm/slb_low.S
index 17aa6df..1a16ca2 100644
--- a/arch/powerpc/mm/slb_low.S
+++ b/arch/powerpc/mm/slb_low.S
@@ -31,15 +31,10 @@
  * No other registers are examined or changed.
  */
 _GLOBAL(slb_allocate_realmode)
-	/*
-	 * check for bad kernel/user address
-	 * (ea & ~REGION_MASK) >= PGTABLE_RANGE
-	 */
-	rldicr. r9,r3,4,(63 - 46 - 4)
-	bne-	8f
+	/* r3 = faulting address */
 
 	srdi	r9,r3,60		/* get region */
-	srdi	r10,r3,SID_SHIFT	/* get esid */
+	srdi	r10,r3,28		/* get esid */
 	cmpldi	cr7,r9,0xc		/* cmp PAGE_OFFSET for later use */
 
 	/* r3 = address, r10 = esid, cr7 = <> PAGE_OFFSET */
@@ -61,14 +56,12 @@ _GLOBAL(slb_allocate_realmode)
 	 */
 _GLOBAL(slb_miss_kernel_load_linear)
 	li	r11,0
+	li	r9,0x1
 	/*
-	 * context = (MAX_USER_CONTEXT) + ((ea >> 60) - 0xc) + 1
-	 * r9 = region id.
+	 * for 1T we shift 12 bits more.  slb_finish_load_1T will do
+	 * the necessary adjustment
 	 */
-	addis	r9,r9,(MAX_USER_CONTEXT - 0xc + 1)@ha
-	addi	r9,r9,(MAX_USER_CONTEXT - 0xc + 1)@l
-
-
+	rldimi  r10,r9,(CONTEXT_BITS + USER_ESID_BITS),0
 BEGIN_FTR_SECTION
 	b	slb_finish_load
 END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT)
@@ -98,19 +91,24 @@ _GLOBAL(slb_miss_kernel_load_vmemmap)
 	_GLOBAL(slb_miss_kernel_load_io)
 	li	r11,0
 6:
+	li	r9,0x1
 	/*
-	 * context = (MAX_USER_CONTEXT) + ((ea >> 60) - 0xc) + 1
-	 * r9 = region id.
+	 * for 1T we shift 12 bits more.  slb_finish_load_1T will do
+	 * the necessary adjustment
 	 */
-	addis	r9,r9,(MAX_USER_CONTEXT - 0xc + 1)@ha
-	addi	r9,r9,(MAX_USER_CONTEXT - 0xc + 1)@l
-
+	rldimi  r10,r9,(CONTEXT_BITS + USER_ESID_BITS),0
 BEGIN_FTR_SECTION
 	b	slb_finish_load
 END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT)
 	b	slb_finish_load_1T
 
-0:
+0:	/* user address: proto-VSID = context << 15 | ESID. First check
+	 * if the address is within the boundaries of the user region
+	 */
+	srdi.	r9,r10,USER_ESID_BITS
+	bne-	8f			/* invalid ea bits set */
+
+
 	/* when using slices, we extract the psize off the slice bitmaps
 	 * and then we need to get the sllp encoding off the mmu_psize_defs
 	 * array.
@@ -166,13 +164,15 @@ END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT)
 	ld	r9,PACACONTEXTID(r13)
 BEGIN_FTR_SECTION
 	cmpldi	r10,0x1000
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_1T_SEGMENT)
+	rldimi	r10,r9,USER_ESID_BITS,0
+BEGIN_FTR_SECTION
 	bge	slb_finish_load_1T
 END_MMU_FTR_SECTION_IFSET(MMU_FTR_1T_SEGMENT)
 	b	slb_finish_load
 
 8:	/* invalid EA */
 	li	r10,0			/* BAD_VSID */
-	li	r9,0			/* BAD_VSID */
 	li	r11,SLB_VSID_USER	/* flags don't much matter */
 	b	slb_finish_load
 
@@ -221,6 +221,8 @@ _GLOBAL(slb_allocate_user)
 
 	/* get context to calculate proto-VSID */
 	ld	r9,PACACONTEXTID(r13)
+	rldimi	r10,r9,USER_ESID_BITS,0
+
 	/* fall through slb_finish_load */
 
 #endif /* __DISABLED__ */
@@ -229,10 +231,9 @@ _GLOBAL(slb_allocate_user)
 /*
  * Finish loading of an SLB entry and return
  *
- * r3 = EA, r9 = context, r10 = ESID, r11 = flags, clobbers r9, cr7 = <> PAGE_OFFSET
+ * r3 = EA, r10 = proto-VSID, r11 = flags, clobbers r9, cr7 = <> PAGE_OFFSET
  */
 slb_finish_load:
-	rldimi  r10,r9,ESID_BITS,0
 	ASM_VSID_SCRAMBLE(r10,r9,256M)
 	/*
 	 * bits above VSID_BITS_256M need to be ignored from r10
@@ -297,11 +298,10 @@ _GLOBAL(slb_compare_rr_to_size)
 /*
  * Finish loading of a 1T SLB entry (for the kernel linear mapping) and return.
  *
- * r3 = EA, r9 = context, r10 = ESID(256MB), r11 = flags, clobbers r9
+ * r3 = EA, r10 = proto-VSID, r11 = flags, clobbers r9
  */
 slb_finish_load_1T:
-	srdi	r10,r10,(SID_SHIFT_1T - SID_SHIFT)	/* get 1T ESID */
-	rldimi  r10,r9,ESID_BITS_1T,0
+	srdi	r10,r10,40-28		/* get 1T ESID */
 	ASM_VSID_SCRAMBLE(r10,r9,1T)
 	/*
 	 * bits above VSID_BITS_1T need to be ignored from r10
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index 023ec8a..0d82ef5 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -82,11 +82,11 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
 	if (!is_kernel_addr(addr)) {
 		ssize = user_segment_size(addr);
 		vsid = get_vsid(mm->context.id, addr, ssize);
+		WARN_ON(vsid == 0);
 	} else {
 		vsid = get_kernel_vsid(addr, mmu_kernel_ssize);
 		ssize = mmu_kernel_ssize;
 	}
-	WARN_ON(vsid == 0);
 	vpn = hpt_vpn(addr, vsid, ssize);
 	rpte = __real_pte(__pte(pte), ptep);