[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/slb.c b/arch/powerpc/mm/slb.c
index 60e852f2f8e5..a47b273600ec 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -134,14 +134,14 @@ void switch_slb(struct task_struct *tsk, struct mm_struct *mm)
         else
                 unmapped_base = TASK_UNMAPPED_BASE_USER64;
 
-        if (pc >= KERNELBASE)
+        if (is_kernel_addr(pc))
                 return;
         slb_allocate(pc);
 
         if (GET_ESID(pc) == GET_ESID(stack))
                 return;
 
-        if (stack >= KERNELBASE)
+        if (is_kernel_addr(stack))
                 return;
         slb_allocate(stack);
 
@@ -149,7 +149,7 @@ void switch_slb(struct task_struct *tsk, struct mm_struct *mm)
             || (GET_ESID(stack) == GET_ESID(unmapped_base)))
                 return;
 
-        if (unmapped_base >= KERNELBASE)
+        if (is_kernel_addr(unmapped_base))
                 return;
         slb_allocate(unmapped_base);
 }