compat: backport dma_set_coherent_mask

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/include/linux/compat-2.6.34.h b/include/linux/compat-2.6.34.h
index b1c15a71ce932d0ef6e3e49ad4df3f0258be66a5..336c61b261695fc5014917e80c3f50c576dc3c0d 100644 (file)
--- a/include/linux/compat-2.6.34.h
+++ b/include/linux/compat-2.6.34.h
@@ -216,6 +216,14 @@ do {                                                       \
 #define dma_unmap_len_set(PTR, LEN_NAME, VAL)    do { } while (0)
 #endif
 
+static inline int dma_set_coherent_mask(struct device *dev, u64 mask)
+{
+       if (!dma_supported(dev, mask))
+               return -EIO;
+       dev->coherent_dma_mask = mask;
+       return 0;
+}
+
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)) */
 
 #endif /* LINUX_26_34_COMPAT_H */