linux/kernel.h: Add PTR_ALIGN_DOWN macro

[sfrench/cifs-2.6.git] / include / linux / kernel.h

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 82d91547d122d50ef1f0afedb566b80aca2b3863..7339a00c895eb86f1772db573e9ad303d25a7617 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -34,6 +34,7 @@
 #define ALIGN_DOWN(x, a)       __ALIGN_KERNEL((x) - ((a) - 1), (a))
 #define __ALIGN_MASK(x, mask)  __ALIGN_KERNEL_MASK((x), (mask))
 #define PTR_ALIGN(p, a)                ((typeof(p))ALIGN((unsigned long)(p), (a)))
+#define PTR_ALIGN_DOWN(p, a)   ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a)))
 #define IS_ALIGNED(x, a)               (((x) & ((typeof(x))(a) - 1)) == 0)
 
 /* generic data direction definitions */