Messages in this thread Patch in this message |  | | From | Kishon Vijay Abraham I <> | Subject | [PATCH v2 03/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro | Date | Mon, 6 Jan 2020 15:50:47 +0530 |
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Add a macro for aligning down a pointer. This is useful to get an aligned register address when a device allows only word access and doesn't allow half word or byte access.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> --- include/linux/kernel.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 3adcb39fa6f5..888ad70a80aa 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -34,6 +34,7 @@ #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 PTR_ALIGN_DOWN(p, a) ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a))) #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) /* generic data direction definitions */ -- 2.17.1
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