[PATCH v3 3/6] dma-mapping: Remove dma_check_mask()

[Thiago Jung Bauermann]

sme_active() is an x86-specific function so it's better not to call it from
generic code. Christoph Hellwig mentioned that "There is no reason why we
should have a special debug printk just for one specific reason why there
is a requirement for a large DMA mask.", so just remove dma_check_mask().

Signed-off-by: Thiago Jung Bauermann <bauer...@linux.ibm.com>
---
 kernel/dma/mapping.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 1f628e7ac709..61eeefbfcb36 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -291,12 +291,6 @@ void dma_free_attrs(struct device *dev, size_t size, void 
*cpu_addr,
 }
 EXPORT_SYMBOL(dma_free_attrs);
 
-static inline void dma_check_mask(struct device *dev, u64 mask)
-{
-       if (sme_active() && (mask < (((u64)sme_get_me_mask() << 1) - 1)))
-               dev_warn(dev, "SME is active, device will require DMA bounce 
buffers\n");
-}
-
 int dma_supported(struct device *dev, u64 mask)
 {
        const struct dma_map_ops *ops = get_dma_ops(dev);
@@ -327,7 +321,6 @@ int dma_set_mask(struct device *dev, u64 mask)
                return -EIO;
 
        arch_dma_set_mask(dev, mask);
-       dma_check_mask(dev, mask);
        *dev->dma_mask = mask;
        return 0;
 }
@@ -345,7 +338,6 @@ int dma_set_coherent_mask(struct device *dev, u64 mask)
        if (!dma_supported(dev, mask))
                return -EIO;
 
-       dma_check_mask(dev, mask);
        dev->coherent_dma_mask = mask;
        return 0;
 }