2 files changed, 10 insertions, 0 deletions

diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index 946f4d778f71..3281fb4b12e3 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -23,6 +23,10 @@ struct machine_desc {
 
         unsigned int            nr_irqs;        /* number of IRQs */
 
+#ifdef CONFIG_ZONE_DMA
+        unsigned long           dma_zone_size;  /* size of DMA-able area */
+#endif
+
         unsigned int            video_start;    /* start of video RAM   */
         unsigned int            video_end;      /* end of video RAM     */
 
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index ed11fb08b05a..e0db84d7e384 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -916,6 +916,12 @@ void __init setup_arch(char **cmdline_p)
         cpu_init();
         tcm_init();
 
+#ifdef CONFIG_ZONE_DMA
+        if (mdesc->dma_zone_size) {
+                extern unsigned long arm_dma_zone_size;
+                arm_dma_zone_size = mdesc->dma_zone_size;
+        }
+#endif
 #ifdef CONFIG_MULTI_IRQ_HANDLER
         handle_arch_irq = mdesc->handle_irq;
 #endif