[PATCH v5 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro

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From: Kishon Vijay Abraham I <kishon@ti.com>
To: Tom Joseph <tjoseph@cadence.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Rob Herring <robh@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>
Cc: <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	<devicetree@vger.kernel.org>, <linux-omap@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	Kishon Vijay Abraham I <kishon@ti.com>
Subject: [PATCH v5 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro
Date: Fri, 22 May 2020 09:06:19 +0530	[thread overview]
Message-ID: <20200522033631.32574-3-kishon@ti.com> (raw)
In-Reply-To: <20200522033631.32574-1-kishon@ti.com>

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.

Acked-by: Rob Herring <robh@kernel.org>
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 9b7a8d74a9d6..c3b361b5be54 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

WARNING: multiple messages have this Message-ID (diff)

From: Kishon Vijay Abraham I <kishon@ti.com>
To: Tom Joseph <tjoseph@cadence.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Rob Herring <robh@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>
Cc: devicetree@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro
Date: Fri, 22 May 2020 09:06:19 +0530	[thread overview]
Message-ID: <20200522033631.32574-3-kishon@ti.com> (raw)
In-Reply-To: <20200522033631.32574-1-kishon@ti.com>

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.

Acked-by: Rob Herring <robh@kernel.org>
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 9b7a8d74a9d6..c3b361b5be54 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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next prev parent reply	other threads:[~2020-05-22  3:37 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-22  3:36 [PATCH v5 00/14] Add PCIe support to TI's J721E SoC Kishon Vijay Abraham I
2020-05-22  3:36 ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 01/14] PCI: cadence: Fix cdns_pcie_{host|ep}_setup() error path Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` Kishon Vijay Abraham I [this message]
2020-05-22  3:36   ` [PATCH v5 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 03/14] PCI: cadence: Convert all r/w accessors to perform only 32-bit accesses Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22 15:54   ` Rob Herring
2020-05-22 15:54     ` Rob Herring
2020-05-25  3:30     ` Kishon Vijay Abraham I
2020-05-25  3:30       ` Kishon Vijay Abraham I
2020-05-26 15:12       ` Rob Herring
2020-05-26 15:12         ` Rob Herring
2020-05-27 10:49         ` Kishon Vijay Abraham I
2020-05-27 10:49           ` Kishon Vijay Abraham I
2020-05-27 16:37           ` Rob Herring
2020-05-27 16:37             ` Rob Herring
2020-05-27 22:06             ` Kishon Vijay Abraham I
2020-05-27 22:06               ` Kishon Vijay Abraham I
2020-06-01  1:16               ` Kishon Vijay Abraham I
2020-06-01  1:16                 ` Kishon Vijay Abraham I
2020-06-08 15:58                 ` Kishon Vijay Abraham I
2020-06-08 15:58                   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 04/14] PCI: cadence: Add support to start link and verify link status Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 05/14] PCI: cadence: Allow pci_host_bridge to have custom pci_ops Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 06/14] dt-bindings: PCI: cadence: Remove "mem" from reg binding Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-26 22:53   ` Rob Herring
2020-05-26 22:53     ` Rob Herring
2020-05-22  3:36 ` [PATCH v5 07/14] PCI: cadence: Add new *ops* for CPU addr fixup Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 08/14] PCI: cadence: Fix updating Vendor ID and Subsystem Vendor ID register Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 09/14] PCI: cadence: Add MSI-X support to Endpoint driver Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 10/14] dt-bindings: PCI: Add host mode dt-bindings for TI's J721E SoC Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 11/14] dt-bindings: PCI: Add EP " Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 12/14] PCI: j721e: Add TI J721E PCIe driver Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 13/14] misc: pci_endpoint_test: Add J721E in pci_device_id table Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I
2020-05-22  3:36 ` [PATCH v5 14/14] MAINTAINERS: Add Kishon Vijay Abraham I for TI J721E SoC PCIe Kishon Vijay Abraham I
2020-05-22  3:36   ` Kishon Vijay Abraham I

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:9b7a8d74a9d dfblob:9b7a8d74a9d dfblob:c3b361b5be5
dfblob:c3b361b5be5
	(help)

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