From: Krzysztof Kozlowski <krzk@kernel.org>
To: James Hogan <james.hogan@imgtec.com>,
Matt Mackall <mpm@selenic.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Kukjin Kim <kgene@kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Javier Martinez Canillas <javier@osg.samsung.com>,
"David S. Miller" <davem@davemloft.net>,
Dave Airlie <airlied@redhat.com>, David Airlie <airlied@linux.ie>,
Bernie Thompson <bernie@plugable.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>,
linux-kernel@vger.kernel.org, linux-metag@vger.kernel.org,
linux-crypto@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org
Subject: [PATCH v5 1/2] linux/kernel.h: Add ALIGN_DOWN macro
Date: Tue, 11 Apr 2017 20:08:34 +0200 [thread overview]
Message-ID: <20170411180835.8928-2-krzk@kernel.org> (raw)
In-Reply-To: <20170411180835.8928-1-krzk@kernel.org>
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>
---
The metag change was not even compiled due to lack of cross compiler.
---
arch/metag/kernel/stacktrace.c | 2 --
drivers/gpu/drm/udl/udl_fb.c | 2 +-
include/linux/kernel.h | 1 +
include/video/udlfb.h | 2 +-
4 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/metag/kernel/stacktrace.c b/arch/metag/kernel/stacktrace.c
index 91ffc4b75c33..09d67b7f51ca 100644
--- a/arch/metag/kernel/stacktrace.c
+++ b/arch/metag/kernel/stacktrace.c
@@ -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,
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index d05abc69e305..4a6500362564 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -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)
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)
diff --git a/include/video/udlfb.h b/include/video/udlfb.h
index f9466fa54ba4..3ea90aea5617 100644
--- a/include/video/udlfb.h
+++ b/include/video/udlfb.h
@@ -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
--
2.9.3
next parent reply other threads:[~2017-04-11 18:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170411180835.8928-1-krzk@kernel.org>
2017-04-11 18:08 ` Krzysztof Kozlowski [this message]
[not found] ` <20170411180835.8928-1-krzk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-04-11 18:08 ` [PATCH v5 2/2] crypto: hw_random - Add new Exynos RNG driver Krzysztof Kozlowski
2017-04-21 13:15 ` [PATCH v5 0/2] " Herbert Xu
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