[POWERPC] Introduce lowmem_end_addr to distinguish from total_lowmem

total_lowmem represents the amount of low memory, not the physical
address that low memory ends at.  If the start of memory is at 0 it
happens that total_lowmem can be used as both the size and the address
that lowmem ends at (or more specifically one byte beyond the end).

To make the code a bit more clear and deal with the case when the start of
memory isn't at physical 0, we introduce lowmem_end_addr that represents
one byte beyond the last physical address in the lowmem region.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/powerpc/mm/44x_mmu.c b/arch/powerpc/mm/44x_mmu.c
index 04dc08798d3d..953fb919eb06 100644
--- a/arch/powerpc/mm/44x_mmu.c
+++ b/arch/powerpc/mm/44x_mmu.c
@@ -67,7 +67,7 @@ unsigned long __init mmu_mapin_ram(void)
 
         /* Pin in enough TLBs to cover any lowmem not covered by the
          * initial 256M mapping established in head_44x.S */
-        for (addr = PPC_PIN_SIZE; addr < total_lowmem;
+        for (addr = PPC_PIN_SIZE; addr < lowmem_end_addr;
              addr += PPC_PIN_SIZE)
                 ppc44x_pin_tlb(addr + PAGE_OFFSET, addr);