linux-kernel - [RFC-PATCH] lib: add byteorder helpers for the aligned case

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Date:	Fri, 16 May 2008 11:09:45 -0700
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Bryan Wu <cooloney@...nel.org>, Jie Zhang <jie.zhang@...log.com>,
	Oliver Neukum <oliver@...kum.org>, david-b@...bell.net,
	greg@...ah.com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [RFC-PATCH] lib: add byteorder helpers for the aligned case

Some users know the pointer they are writing to are aligned,
rather than doing *(__le16 *)ptr = cpu_to_le16(val) add helpers
wrapping this up that have the same convention as put_unaligned_le/be.

Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
Alan, as requested, I'm looking around a bit to see if there are actual
users for this.  But it does make a nice complement to the unaligned
versions.

 include/linux/byteorder/generic.h |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/include/linux/byteorder/generic.h b/include/linux/byteorder/generic.h
index 0846e6b..38ff3e6 100644
--- a/include/linux/byteorder/generic.h
+++ b/include/linux/byteorder/generic.h
@@ -119,6 +119,36 @@
 #define cpu_to_be16s __cpu_to_be16s
 #define be16_to_cpus __be16_to_cpus
 
+static inline void put_le16(u16 val, void *ptr)
+{
+	*(__le16 *)ptr = cpu_to_le16(val);
+}
+
+static inline void put_le32(u32 val, void *ptr)
+{
+	*(__le32 *)ptr = cpu_to_le32(val);
+}
+
+static inline void put_le64(u64 val, void *ptr)
+{
+	*(__le64 *)ptr = cpu_to_le64(val);
+}
+
+static inline void put_be16(u16 val, void *ptr)
+{
+	*(__be16 *)ptr = cpu_to_be16(val);
+}
+
+static inline void put_be32(u32 val, void *ptr)
+{
+	*(__be32 *)ptr = cpu_to_be32(val);
+}
+
+static inline void put_be64(u64 val, void *ptr)
+{
+	*(__be64 *)ptr = cpu_to_be64(val);
+}
+
 /*
  * They have to be macros in order to do the constant folding
  * correctly - if the argument passed into a inline function
-- 
1.5.5.1.570.g26b5e



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