diff options
| author | Krzysztof Kozlowski <krzk@kernel.org> | 2017-04-11 20:08:34 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-04-21 20:30:44 +0800 |
| commit | ed067d4a859ff696373324c5061392e013a7561a (patch) | |
| tree | ad38c59cb06b548f56d1bbc38845a39b9091a056 /include/linux/kernel.h | |
| parent | 7e207d8550644c1076ceb070f40abf52701253ec (diff) | |
linux/kernel.h: Add ALIGN_DOWN macro
Few parts of kernel define their own macro for aligning down so provide
a common define for this, with the same usage and assumptions as existing
ALIGN.
Convert also three existing implementations to this one.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 4c26dc3a8295..3d9f8420f973 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -47,6 +47,7 @@ /* @a is a power of 2 value */ #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) +#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a)) #define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask)) #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) |