Add DMA_BIT_MASK() for older kernels

[~emulex/for-vlad/old/compat.git] / include / linux / compat-2.6.24.h

diff --git a/include/linux/compat-2.6.24.h b/include/linux/compat-2.6.24.h
index f3eaec3..ac9489f 100644 (file)
--- a/include/linux/compat-2.6.24.h
+++ b/include/linux/compat-2.6.24.h
@@ -18,6 +18,8 @@
 #define KEY_WLAN       238
 #define KEY_UWB                239
 
+#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
+
 /* Added on 2.6.24 in include/linux/types.h by Al viro on commit 142956af */
 typedef unsigned long               uintptr_t;