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-rw-r--r--arch/powerpc/mm/mem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 6d5f0fc76666..b6beb86e5300 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -249,7 +249,7 @@ void __init paging_init(void)
#ifdef CONFIG_ZONE_DMA
max_zone_pfns[ZONE_DMA] = min(max_low_pfn,
- ((1UL << ARCH_ZONE_DMA_BITS) - 1) >> PAGE_SHIFT);
+ 1UL << (ARCH_ZONE_DMA_BITS - PAGE_SHIFT));
#endif
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_HIGHMEM