powerpc/mm/hash: Rename KERNEL_REGION_ID to LINEAR_MAP_REGION_ID

The region actually point to linear map. Rename the #define to
clarify thati.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/book3s/64/hash.h

@@ -89,7 +89,7 @@
  * Region IDs
  */
 #define USER_REGION_ID		0
-#define KERNEL_REGION_ID	1
+#define LINEAR_MAP_REGION_ID	1
 #define VMALLOC_REGION_ID	NON_LINEAR_REGION_ID(H_VMALLOC_START)
 #define IO_REGION_ID		NON_LINEAR_REGION_ID(H_KERN_IO_START)
 #define VMEMMAP_REGION_ID	NON_LINEAR_REGION_ID(H_VMEMMAP_START)
@@ -120,7 +120,7 @@ static inline int get_region_id(unsigned long ea)
 		return USER_REGION_ID;
 
 	if (ea < H_KERN_VIRT_START)
-		return KERNEL_REGION_ID;
+		return LINEAR_MAP_REGION_ID;
 
 	VM_BUG_ON(id != 0xc);
 	BUILD_BUG_ON(NON_LINEAR_REGION_ID(H_VMALLOC_START) != 2);

arch/powerpc/include/asm/book3s/64/mmu-hash.h

@@ -817,7 +817,7 @@ static inline unsigned long get_kernel_context(unsigned long ea)
 	 * Depending on Kernel config, kernel region can have one context
 	 * or more.
 	 */
-	if (region_id == KERNEL_REGION_ID) {
+	if (region_id == LINEAR_MAP_REGION_ID) {
 		/*
 		 * We already verified ea to be not beyond the addr limit.
 		 */

arch/powerpc/mm/copro_fault.c

@@ -129,8 +129,8 @@ int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb)
 		vsid = get_kernel_vsid(ea, mmu_kernel_ssize);
 		vsidkey = SLB_VSID_KERNEL;
 		break;
-	case KERNEL_REGION_ID:
-		pr_devel("%s: 0x%llx -- KERNEL_REGION_ID\n", __func__, ea);
+	case LINEAR_MAP_REGION_ID:
+		pr_devel("%s: 0x%llx -- LINEAR_MAP_REGION_ID\n", __func__, ea);
 		psize = mmu_linear_psize;
 		ssize = mmu_kernel_ssize;
 		vsid = get_kernel_vsid(ea, mmu_kernel_ssize);

arch/powerpc/mm/slb.c

@@ -691,7 +691,7 @@ static long slb_allocate_kernel(unsigned long ea, unsigned long id)
 	unsigned long flags;
 	int ssize;
 
-	if (id == KERNEL_REGION_ID) {
+	if (id == LINEAR_MAP_REGION_ID) {
 
 		/* We only support upto MAX_PHYSMEM_BITS */
 		if ((ea & EA_MASK) > (1UL << MAX_PHYSMEM_BITS))
@@ -790,7 +790,7 @@ long do_slb_fault(struct pt_regs *regs, unsigned long ea)
 	 * first class kernel code. But for performance it's probably nicer
 	 * if they go via fast_exception_return too.
 	 */
-	if (id >= KERNEL_REGION_ID) {
+	if (id >= LINEAR_MAP_REGION_ID) {
 		long err;
 #ifdef CONFIG_DEBUG_VM
 		/* Catch recursive kernel SLB faults. */

arch/powerpc/platforms/cell/spu_base.c

@@ -224,7 +224,7 @@ static void __spu_kernel_slb(void *addr, struct copro_slb *slb)
 	unsigned long ea = (unsigned long)addr;
 	u64 llp;
 
-	if (get_region_id(ea) == KERNEL_REGION_ID)
+	if (get_region_id(ea) == LINEAR_MAP_REGION_ID)
 		llp = mmu_psize_defs[mmu_linear_psize].sllp;
 	else
 		llp = mmu_psize_defs[mmu_virtual_psize].sllp;