[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>

2 files changed, 2 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index bcdc209dca85..369e1a6cdd40 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1994,7 +1994,7 @@ static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
         if (r3 && r4 && r4 != 0xdeadbeef) {
                 unsigned long val;
 
-                RELOC(prom_initrd_start) = (r3 >= KERNELBASE) ? __pa(r3) : r3;
+                RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3;
                 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
 
                 val = RELOC(prom_initrd_start);
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index a6d8aebf2bc6..d5c52fae023a 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -319,7 +319,7 @@ void __init check_for_initrd(void)
         /* If we were passed an initrd, set the ROOT_DEV properly if the values
          * look sensible. If not, clear initrd reference.
          */
-        if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
+        if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
             initrd_end > initrd_start)
                 ROOT_DEV = Root_RAM0;
         else