[PATCH] powerpc: Replace VMALLOCBASE with VMALLOC_START

On ppc64, we independently define VMALLOCBASE and VMALLOC_START to be
the same thing: the start of the vmalloc() area at 0xd000000000000000.
VMALLOC_START is used much more widely, including in generic code, so
this patch gets rid of the extraneous VMALLOCBASE.

This does require moving the definitions of region IDs from page_64.h
to pgtable.h, but they don't clearly belong in the former rather than
the latter, anyway.  While we're moving them, clean up the definitions
of the REGION_IDs:
	- Abolish REGION_SIZE, it was only used once, to define
REGION_MASK anyway
	- Define the specific region ids in terms of the REGION_ID()
macro.
	- Define KERNEL_REGION_ID in terms of PAGE_OFFSET rather than
KERNELBASE.  It amounts to the same thing, but conceptually this is
about the region of the linear mapping (which starts at PAGE_OFFSET)
rather than of the kernel text itself (which is at KERNELBASE).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 5 insertions, 5 deletions

diff --git a/arch/powerpc/kernel/lparmap.c b/arch/powerpc/kernel/lparmap.c
index 8a53d436ad9a..92d947447565 100644
--- a/arch/powerpc/kernel/lparmap.c
+++ b/arch/powerpc/kernel/lparmap.c
@@ -18,8 +18,8 @@ const struct LparMap __attribute__((__section__(".text"))) xLparMap = {
         .xEsids = {
                 { .xKernelEsid = GET_ESID(PAGE_OFFSET),
                   .xKernelVsid = KERNEL_VSID(PAGE_OFFSET), },
-                { .xKernelEsid = GET_ESID(VMALLOCBASE),
-                  .xKernelVsid = KERNEL_VSID(VMALLOCBASE), },
+                { .xKernelEsid = GET_ESID(VMALLOC_START),
+                  .xKernelVsid = KERNEL_VSID(VMALLOC_START), },
         },
 
         .xRanges = {
diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index cc22570856af..ffc8ed4de62d 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -87,8 +87,8 @@ static void slb_flush_and_rebolt(void)
                      /* Slot 2 - kernel stack */
                      "slbmte    %2,%3\n"
                      "isync"
-                     :: "r"(mk_vsid_data(VMALLOCBASE, vflags)),
-                        "r"(mk_esid_data(VMALLOCBASE, 1)),
+                     :: "r"(mk_vsid_data(VMALLOC_START, vflags)),
+                        "r"(mk_esid_data(VMALLOC_START, 1)),
                         "r"(mk_vsid_data(ksp_esid_data, lflags)),
                         "r"(ksp_esid_data)
                      : "memory");
@@ -216,7 +216,7 @@ void slb_initialize(void)
         create_slbe(PAGE_OFFSET, lflags, 0);
 
         /* VMALLOC space has 4K pages always for now */
-        create_slbe(VMALLOCBASE, vflags, 1);
+        create_slbe(VMALLOC_START, vflags, 1);
 
         /* We don't bolt the stack for the time being - we're in boot,
          * so the stack is in the bolted segment.  By the time it goes