diff options
| author | Kishon Vijay Abraham I <kishon@ti.com> | 2020-07-22 16:33:05 +0530 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-07-27 15:46:16 +0100 |
| commit | 229f5879facf96e5640c0385f62b8cb5f27b8a43 (patch) | |
| tree | 2400b4b2c2f2e97a6297ffddf86652cbfbc2da0f /include/linux/kernel.h | |
| parent | 19abcd790b51b26d775e1170ba2ac086823cceeb (diff) | |
linux/kernel.h: Add PTR_ALIGN_DOWN macro
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.
Link: https://lore.kernel.org/r/20200722110317.4744-4-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
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 82d91547d122..7339a00c895e 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 */ |