ARM: Use GFP_DMA only for masks _less_ than 32-bit

We were using GFP_DMA for masks other than 0xffffffff, which is
wrong when some masks are initialized to 0xffffffffffffffff.
This caused such masks to obtain memory from the precious DMA
pool.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index b30925f..b9590a7 100644 (file)
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -205,7 +205,7 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
 
        order = get_order(size);
 
-       if (mask != 0xffffffff)
+       if (mask < 0xffffffffULL)
                gfp |= GFP_DMA;
 
        page = alloc_pages(gfp, order);
@@ -289,7 +289,7 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
        if (!mask)
                goto error;
 
-       if (mask != 0xffffffff)
+       if (mask < 0xffffffffULL)
                gfp |= GFP_DMA;
        virt = kmalloc(size, gfp);
        if (!virt)