From: Martin Kepplinger <martink@posteo.de>
To: linux@roeck-us.net, mingo@kernel.org, hpa@zytor.com
Cc: peterz@infradead.org, torvalds@linux-foundation.org,
jsrhbz@kanargh.force9.co.uk,
christoph.muellner@theobroma-systems.com,
linux@rasmusvillemoes.dk, paulmck@linux.vnet.ibm.com,
tglx@linutronix.de, akpm@linux-foundation.org,
maxime.coquelin@st.com, linux-kernel@vger.kernel.org,
tytso@mit.edu, linux-tip-commits@vger.kernel.org,
Martin Kepplinger <martink@posteo.de>
Subject: [RFC][PATCH] arch: sh: use sign_extend64() for sign extension
Date: Thu, 12 Feb 2015 12:11:30 +0100 [thread overview]
Message-ID: <1423739490-5187-2-git-send-email-martink@posteo.de> (raw)
In-Reply-To: <1423739490-5187-1-git-send-email-martink@posteo.de>
Signed-off-by: Martin Kepplinger <martink@posteo.de>
---
arch/sh/kernel/traps_64.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/sh/kernel/traps_64.c b/arch/sh/kernel/traps_64.c
index 112ea11..4e04261 100644
--- a/arch/sh/kernel/traps_64.c
+++ b/arch/sh/kernel/traps_64.c
@@ -25,6 +25,7 @@
#include <linux/sysctl.h>
#include <linux/module.h>
#include <linux/perf_event.h>
+#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/alignment.h>
@@ -101,7 +102,7 @@ static int generate_and_check_address(struct pt_regs *regs,
if (displacement_not_indexed) {
__s64 displacement;
displacement = (opcode >> 10) & 0x3ff;
- displacement = ((displacement << 54) >> 54); /* sign extend */
+ displacement = sign_extend64(displacement, 9);
addr = (__u64)((__s64)base_address + (displacement << width_shift));
} else {
__u64 offset;
--
2.1.4
next prev parent reply other threads:[~2015-02-12 11:12 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 ` [PATCH 1/2] bitops.h: improve documentation for sign_extend32() Martin Kepplinger
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 ` Martin Kepplinger [this message]
2015-02-05 16:39 ` [tip:core/types] bitops: Add sign_extend8(), 16 and 64 functions H. Peter Anvin
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