[PATCH] powerpc: Add a is_kernel_addr() macro

There's a bunch of code that compares an address with KERNELBASE to see if
it's a "kernel address", ie. >= KERNELBASE. The proper test is actually to
compare with PAGE_OFFSET, since we're going to change KERNELBASE soon.

So replace all of them with an is_kernel_addr() macro that does that.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/powerpc/mm/stab.c b/arch/powerpc/mm/stab.c
index 51e7951414e5..a18dab0d6b12 100644
--- a/arch/powerpc/mm/stab.c
+++ b/arch/powerpc/mm/stab.c
@@ -122,7 +122,7 @@ static int __ste_allocate(unsigned long ea, struct mm_struct *mm)
         unsigned long offset;
 
         /* Kernel or user address? */
-        if (ea >= KERNELBASE) {
+        if (is_kernel_addr(ea)) {
                 vsid = get_kernel_vsid(ea);
         } else {
                 if ((ea >= TASK_SIZE_USER64) || (! mm))
@@ -133,7 +133,7 @@ static int __ste_allocate(unsigned long ea, struct mm_struct *mm)
 
         stab_entry = make_ste(get_paca()->stab_addr, GET_ESID(ea), vsid);
 
-        if (ea < KERNELBASE) {
+        if (!is_kernel_addr(ea)) {
                 offset = __get_cpu_var(stab_cache_ptr);
                 if (offset < NR_STAB_CACHE_ENTRIES)
                         __get_cpu_var(stab_cache[offset++]) = stab_entry;
@@ -190,7 +190,7 @@ void switch_stab(struct task_struct *tsk, struct mm_struct *mm)
                      entry++, ste++) {
                         unsigned long ea;
                         ea = ste->esid_data & ESID_MASK;
-                        if (ea < KERNELBASE) {
+                        if (!is_kernel_addr(ea)) {
                                 ste->esid_data = 0;
                         }
                 }