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Commit 890658b7 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

locking/mutex: Kill arch specific code 



Its all generic atomic_long_t stuff now.

Tested-by: default avatarJason Low <jason.low2@hpe.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 3ca0ff57

arch/alpha/include/asm/mutex.h

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/*

 * Pull in the generic implementation for the mutex fastpath.

 *

 * TODO: implement optimized primitives instead, or leave the generic

 * implementation in place, or pick the atomic_xchg() based generic

 * implementation. (see asm-generic/mutex-xchg.h for details)

 */



#include <asm-generic/mutex-dec.h>

arch/arc/include/asm/mutex.h

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/*

 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



/*

 * xchg() based mutex fast path maintains a state of 0 or 1, as opposed to

 * atomic dec based which can "count" any number of lock contenders.

 * This ideally needs to be fixed in core, but for now switching to dec ver.

 */

#if defined(CONFIG_SMP) && (CONFIG_NR_CPUS > 2)

#include <asm-generic/mutex-dec.h>

#else

#include <asm-generic/mutex-xchg.h>

#endif

arch/arm/include/asm/mutex.h

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/*

 * arch/arm/include/asm/mutex.h

 *

 * ARM optimized mutex locking primitives

 *

 * Please look into asm-generic/mutex-xchg.h for a formal definition.

 */

#ifndef _ASM_MUTEX_H

#define _ASM_MUTEX_H

/*

 * On pre-ARMv6 hardware this results in a swp-based implementation,

 * which is the most efficient. For ARMv6+, we have exclusive memory

 * accessors and use atomic_dec to avoid the extra xchg operations

 * on the locking slowpaths.

 */

#if __LINUX_ARM_ARCH__ < 6

#include <asm-generic/mutex-xchg.h>

#else

#include <asm-generic/mutex-dec.h>

#endif

#endif	/* _ASM_MUTEX_H */

arch/arm64/include/asm/Kbuild

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@@ -24,7 +24,6 @@ generic-y += mm-arch-hooks.h 
generic-y += mman.h

generic-y += msgbuf.h

generic-y += msi.h

generic-y += mutex.h

generic-y += poll.h

generic-y += preempt.h

generic-y += resource.h

arch/avr32/include/asm/mutex.h

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/*

 * Pull in the generic implementation for the mutex fastpath.

 *

 * TODO: implement optimized primitives instead, or leave the generic

 * implementation in place, or pick the atomic_xchg() based generic

 * implementation. (see asm-generic/mutex-xchg.h for details)

 */



#include <asm-generic/mutex-dec.h>