From: Andrew Morton <akpm@linux-foundation.org>
Date: Wed, 19 Jun 2013 00:06:05 +0000 (+1000)
Subject: include/linux/mm.h: add PAGE_ALIGNED() helper
X-Git-Tag: next-20130619~2^2~517
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a11a9cbf0015115850dc14e2a82dabcd67efbdd4;p=karo-tx-linux.git

include/linux/mm.h: add PAGE_ALIGNED() helper

To test whether an address is aligned to PAGE_SIZE.

Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 66d881f1d576..949bd7035895 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -52,6 +52,9 @@ extern unsigned long sysctl_admin_reserve_kbytes;
 /* to align the pointer to the (next) page boundary */
 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
 
+/* test whether an address (unsigned long or pointer) is aligned to PAGE_SIZE */
+#define PAGE_ALIGNED(addr)	IS_ALIGNED((unsigned long)addr, PAGE_SIZE)
+
 /*
  * Linux kernel virtual memory manager primitives.
  * The idea being to have a "virtual" mm in the same way