Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ed067d4a authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Herbert Xu
Browse files

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: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 7e207d85

arch/metag/kernel/stacktrace.c

+0 −2
Original line number Diff line number Diff line
@@ -31,8 +31,6 @@ static void tbi_boing_init(void) 
}

#endif



#define ALIGN_DOWN(addr, size)  ((addr)&(~((size)-1)))



/*

 * Unwind the current stack frame and store the new register values in the

 * structure passed as argument. Unwinding is equivalent to a function return,

drivers/gpu/drm/udl/udl_fb.c

+1 −1
Original line number Diff line number Diff line
@@ -37,7 +37,7 @@ struct udl_fbdev { 
};



#define DL_ALIGN_UP(x, a) ALIGN(x, a)

#define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a)

#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)



/** Read the red component (0..255) of a 32 bpp colour. */

#define DLO_RGB_GETRED(col) (uint8_t)((col) & 0xFF)

include/linux/kernel.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

include/video/udlfb.h

+1 −1
Original line number Diff line number Diff line
@@ -92,6 +92,6 @@ struct dlfb_data { 


/* remove these once align.h patch is taken into kernel */

#define DL_ALIGN_UP(x, a) ALIGN(x, a)

#define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a)

#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)



#endif