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authorAndrew Morton <akpm@linux-foundation.org>2013-07-03 15:02:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:07:30 -0700
commit0fa73b86ef0797ca4fde5334117ca0b330f08030 (patch)
treee3c9a84f928a23b6613f177837fcfd6beb8e41f2 /include/linux/mm.h
parentd702909f0aa14fe678d74d7f974aa66bfb211d0b (diff)
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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> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h3
1 files changed, 3 insertions, 0 deletions
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