PTR_ALIGN

The AdvanSys driver wants to align some pointers, and the ALIGN macro
doesn't work for pointers.  Rather than try to make it work, add a new
PTR_ALIGN macro which is typesafe.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index f592df74b3cfb48637e3806e1e048a384582e53c..47160fe378c98f84b5c5295a7f987744f163a956 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -34,6 +34,7 @@ extern const char linux_proc_banner[];
 
 #define ALIGN(x,a)             __ALIGN_MASK(x,(typeof(x))(a)-1)
 #define __ALIGN_MASK(x,mask)   (((x)+(mask))&~(mask))
+#define PTR_ALIGN(p, a)                ((typeof(p))ALIGN((unsigned long)(p), (a)))
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))