From: Martin Kepplinger <martink@posteo.de>
To: torvalds@linux-foundation.org, jsrhbz@kanargh.force9.co.uk,
christoph.muellner@theobroma-systems.com, linux@roeck-us.net,
linux@rasmusvillemoes.dk, paulmck@linux.vnet.ibm.com,
tglx@linutronix.de, mingo@kernel.org, akpm@linux-foundation.org,
hpa@zytor.com, maxime.coquelin@st.com,
linux-kernel@vger.kernel.org, peterz@infradead.org,
tytso@mit.edu
Cc: linux-tip-commits@vger.kernel.org, Martin Kepplinger <martink@posteo.de>
Subject: [PATCH 1/2] bitops.h: improve documentation for sign_extend32()
Date: Tue, 20 Jan 2015 13:30:54 +0100 [thread overview]
Message-ID: <1421757055-8234-2-git-send-email-martink@posteo.de> (raw)
In-Reply-To: <1421757055-8234-1-git-send-email-martink@posteo.de>
Signed-off-by: Martin Kepplinger <martink@posteo.de>
---
include/linux/bitops.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 5d858e0..336f22b 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -164,6 +164,8 @@ static inline __u8 ror8(__u8 word, unsigned int shift)
* sign_extend32 - sign extend a 32-bit value using specified bit as sign-bit
* @value: value to sign extend
* @index: 0 based bit index (0<=index<32) to sign bit
+ *
+ * Safe to use for sign extending to 8 and 16 bit data types aswell.
*/
static inline __s32 sign_extend32(__u32 value, int index)
{
--
2.1.4
next prev parent reply other threads:[~2015-01-20 12:31 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-12 17:22 [PATCH v2] bitops.h: add sign_extend8(), 16 and 64 functions Martin Kepplinger
2015-01-12 17:28 ` [RFC] input: gtco: use bitops' sign_extend8 Martin Kepplinger
2015-01-12 17:28 ` [RFC] rtc: use sign_extend8 instead of manual conversion Martin Kepplinger
2015-01-12 17:28 ` [RFC] media: stb0899: use sign_extend8 instead of manual work Martin Kepplinger
2015-01-12 17:28 ` [RFC] hwmon: jc42: use bitops' sign_extend16 Martin Kepplinger
2015-01-12 19:53 ` Guenter Roeck
2015-01-12 19:48 ` [PATCH v2] bitops.h: add sign_extend8(), 16 and 64 functions Guenter Roeck
2015-01-14 16:56 ` [RFC PATCH 0/4] Example changes using proposed sign_extend functions Martin Kepplinger
2015-01-14 16:56 ` [PATCH 1/4] input: gtco: use bitops' sign_extend8 Martin Kepplinger
2015-01-14 16:56 ` [PATCH 2/4] rtc: use sign_extend8 instead of manual conversion Martin Kepplinger
2015-01-14 16:56 ` [PATCH 3/4] media: stb0899: use sign_extend8 instead of manual work Martin Kepplinger
2015-01-14 16:56 ` [PATCH 4/4] hwmon: jc42: use bitops' sign_extend16 Martin Kepplinger
2015-01-18 19:06 ` [tip:core/types] bitops: Add sign_extend8(), 16 and 64 functions tip-bot for Martin Kepplinger
[not found] ` <CA+55aFyc7TbnLBi3rcQDrtkwg9TgDnb5dAfupMGSbTKZC6Xd0g@mail.gmail.com>
2015-01-19 1:11 ` Guenter Roeck
2015-01-19 4:00 ` Linus Torvalds
2015-01-20 12:30 ` [PATCH v3 0/2] bitops.h: add sign_extend64() API and improve doc Martin Kepplinger
2015-01-20 12:30 ` Martin Kepplinger [this message]
2015-01-20 12:30 ` [PATCH 2/2] bitops.h: Add sign_extend64() API Martin Kepplinger
2015-01-19 10:04 ` [tip:core/types] bitops: Add sign_extend8(), 16 and 64 functions Peter Zijlstra
2015-01-21 20:22 ` H. Peter Anvin
2015-02-05 7:17 ` Ingo Molnar
2015-02-05 14:11 ` Guenter Roeck
2015-02-12 11:11 ` Example use of sign_extend64() Martin Kepplinger
2015-02-12 11:11 ` [RFC][PATCH] arch: sh: use sign_extend64() for sign extension Martin Kepplinger
2015-02-05 16:39 ` [tip:core/types] bitops: Add sign_extend8(), 16 and 64 functions H. Peter Anvin
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