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linux/kernel.h: Add ALIGN_DOWN macro

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Follow Linux commit ed067d4a859f ("linux/kernel.h: Add ALIGN_DOWN
macro").

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2017-12-21 13:51:46 +09:00 committed by Tom Rini
parent e7dd4f9b0c
commit 75db00eea0
1 changed files with 1 additions and 0 deletions
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include/linux/kernel.h
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@ -38,6 +38,7 @@
#define REPEAT_BYTE(x) ((~0ul / 0xff) * (x)) #define REPEAT_BYTE(x) ((~0ul / 0xff) * (x))
#define ALIGN(x,a) __ALIGN_MASK((x),(typeof(x))(a)-1) #define ALIGN(x,a) __ALIGN_MASK((x),(typeof(x))(a)-1)
#define ALIGN_DOWN(x, a) ALIGN((x) - ((a) - 1), (a))
#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)