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From: Peter Zijlstra <peterz@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>,
	Waiman Long <waiman.long@hpe.com>, Jason Low <jason.low2@hpe.com>,
	Ding Tianhong <dingtianhong@huawei.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Will Deacon <Will.Deacon@arm.com>, Ingo Molnar <mingo@redhat.com>,
	Imre Deak <imre.deak@intel.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Davidlohr Bueso <dave@stgolabs.net>,
	Tim Chen <tim.c.chen@linux.intel.com>,
	Terry Rudd <terry.rudd@hpe.com>,
	"Paul E. McKenney" <paulmck@us.ibm.com>,
	Jason Low <jason.low2@hp.com>,
	Peter Zijlstra <peterz@infradead.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>,
	Rich Felker <dalias@libc.org>,
	Fengguang Wu <fengguang.wu@intel.com>
Subject: [PATCH -v3 02/10] sh/atomic: Fix ATOMIC_FETCH_OP()
Date: Mon, 05 Sep 2016 14:36:38 +0200	[thread overview]
Message-ID: <20160905124027.306155176@infradead.org> (raw)
In-Reply-To: 20160905123636.450529224@infradead.org

[-- Attachment #1: peterz-atomic-fix-sh.patch --]
[-- Type: text/plain, Size: 815 bytes --]

We cannot use the "z" constraint twice, since its a single register
(r0). Change the one not used by movli.l/movco.l to "r".

Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 arch/sh/include/asm/atomic-llsc.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/sh/include/asm/atomic-llsc.h
+++ b/arch/sh/include/asm/atomic-llsc.h
@@ -60,7 +60,7 @@ static inline int atomic_fetch_##op(int
 "	movco.l	%0, @%3					\n"		\
 "	bf	1b					\n"		\
 "	synco						\n"		\
-	: "=&z" (temp), "=&z" (res)					\
+	: "=&z" (temp), "=&r" (res)					\
 	: "r" (i), "r" (&v->counter)					\
 	: "t");								\
 									\

  parent reply	other threads:[~2016-09-05 12:44 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-05 12:36 [PATCH -v3 00/10] locking/mutex: Rewrite basic mutex Peter Zijlstra
2016-09-05 12:36 ` [PATCH -v3 01/10] locking/drm: Kill mutex trickery Peter Zijlstra
2016-09-05 12:36 ` Peter Zijlstra [this message]
2016-09-05 12:36 ` [PATCH -v3 03/10] locking/mutex: Rework mutex::owner Peter Zijlstra
2016-09-05 12:36 ` [PATCH -v3 04/10] locking/mutex: Kill arch specific code Peter Zijlstra
2016-09-05 12:36 ` [PATCH -v3 05/10] locking/mutex: Allow MUTEX_SPIN_ON_OWNER when DEBUG_MUTEXES Peter Zijlstra
2016-09-05 12:36 ` [PATCH -v3 06/10] locking/mutex: Add lock handoff to avoid starvation Peter Zijlstra
2016-09-05 12:36 ` [PATCH -v3 07/10] mutex: Restructure wait loop Peter Zijlstra
     [not found]   ` <57D31A3B.7000105@hpe.com>
     [not found]     ` <57D31C67.8010809@hpe.com>
2016-09-14 10:33       ` Peter Zijlstra
2016-09-05 12:36 ` [PATCH -v3 08/10] locking/mutex: Simplify some ww_mutex code in __mutex_lock_common() Peter Zijlstra
2016-09-05 12:36 ` [PATCH -v3 09/10] locking/mutex: Enable optimistic spinning of woken waiter Peter Zijlstra
2016-09-05 12:36 ` [RFC][PATCH -v3 10/10] locking/mutex: Implement alternative HANDOFF Peter Zijlstra
2016-09-09 22:32   ` Waiman Long
2016-09-12 15:20     ` Peter Zijlstra

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