Commit 335e52c2 authored by David Gow's avatar David Gow Committed by Richard Weinberger

mm: Add PAGE_ALIGN_DOWN macro

This is just the same as PAGE_ALIGN(), but rounds the address down, not
up.
Suggested-by: default avatarDmitry Vyukov <dvyukov@google.com>
Signed-off-by: default avatarDavid Gow <davidgow@google.com>
Acked-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent 9e70cbd1
......@@ -221,6 +221,9 @@ int overcommit_policy_handler(struct ctl_table *, int, void *, size_t *,
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
/* to align the pointer to the (prev) page boundary */
#define PAGE_ALIGN_DOWN(addr) ALIGN_DOWN(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)
......
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