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

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To test whether an address is aligned to PAGE_SIZE.

Change-Id: Id956f67b1a5efc271ab29819e5cd04d4b7cddaa0
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>
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Andrew Morton 2013-07-03 15:02:11 -07:00 committed by followmsi
parent 5fb7660030
commit 1e8f7eaacf
1 changed files with 3 additions and 0 deletions
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include/linux/mm.h
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@ -63,6 +63,9 @@ extern int mmap_rnd_compat_bits __read_mostly;
/* 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