locking/mutex: Kill arch specific code

Its all generic atomic_long_t stuff now.

Tested-by: Jason Low <jason.low2@hpe.com>
Signed-off-by: Peter 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: Ingo Molnar <mingo@kernel.org>

2 files changed, 0 insertions, 121 deletions

diff --git a/arch/sh/include/asm/mutex-llsc.h b/arch/sh/include/asm/mutex-llsc.h
deleted file mode 100644
index dad29b687bd3..000000000000
--- a/arch/sh/include/asm/mutex-llsc.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * arch/sh/include/asm/mutex-llsc.h
- *
- * SH-4A optimized mutex locking primitives
- *
- * Please look into asm-generic/mutex-xchg.h for a formal definition.
- */
-#ifndef __ASM_SH_MUTEX_LLSC_H
-#define __ASM_SH_MUTEX_LLSC_H
-
-/*
- * Attempting to lock a mutex on SH4A is done like in ARMv6+ architecure.
- * with a bastardized atomic decrement (it is not a reliable atomic decrement
- * but it satisfies the defined semantics for our purpose, while being
- * smaller and faster than a real atomic decrement or atomic swap.
- * The idea is to attempt  decrementing the lock value only once. If once
- * decremented it isn't zero, or if its store-back fails due to a dispute
- * on the exclusive store, we simply bail out immediately through the slow
- * path where the lock will be reattempted until it succeeds.
- */
-static inline void
-__mutex_fastpath_lock(atomic_t *count, void (*fail_fn)(atomic_t *))
-{
-	int __done, __res;
-
-	__asm__ __volatile__ (
-		"movli.l	@%2, %0	\n"
-		"add		#-1, %0	\n"
-		"movco.l	%0, @%2	\n"
-		"movt		%1	\n"
-		: "=&z" (__res), "=&r" (__done)
-		: "r" (&(count)->counter)
-		: "t");
-
-	if (unlikely(!__done || __res != 0))
-		fail_fn(count);
-}
-
-static inline int
-__mutex_fastpath_lock_retval(atomic_t *count)
-{
-	int __done, __res;
-
-	__asm__ __volatile__ (
-		"movli.l	@%2, %0	\n"
-		"add		#-1, %0	\n"
-		"movco.l	%0, @%2	\n"
-		"movt		%1	\n"
-		: "=&z" (__res), "=&r" (__done)
-		: "r" (&(count)->counter)
-		: "t");
-
-	if (unlikely(!__done || __res != 0))
-		__res = -1;
-
-	return __res;
-}
-
-static inline void
-__mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *))
-{
-	int __done, __res;
-
-	__asm__ __volatile__ (
-		"movli.l	@%2, %0	\n\t"
-		"add		#1, %0	\n\t"
-		"movco.l	%0, @%2 \n\t"
-		"movt		%1	\n\t"
-		: "=&z" (__res), "=&r" (__done)
-		: "r" (&(count)->counter)
-		: "t");
-
-	if (unlikely(!__done || __res <= 0))
-		fail_fn(count);
-}
-
-/*
- * If the unlock was done on a contended lock, or if the unlock simply fails
- * then the mutex remains locked.
- */
-#define __mutex_slowpath_needs_to_unlock()	1
-
-/*
- * For __mutex_fastpath_trylock we do an atomic decrement and check the
- * result and put it in the __res variable.
- */
-static inline int
-__mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
-{
-	int __res, __orig;
-
-	__asm__ __volatile__ (
-		"1: movli.l	@%2, %0		\n\t"
-		"dt		%0		\n\t"
-		"movco.l	%0,@%2		\n\t"
-		"bf		1b		\n\t"
-		"cmp/eq		#0,%0		\n\t"
-		"bt		2f		\n\t"
-		"mov		#0, %1		\n\t"
-		"bf		3f		\n\t"
-		"2: mov		#1, %1		\n\t"
-		"3:				"
-		: "=&z" (__orig), "=&r" (__res)
-		: "r" (&count->counter)
-		: "t");
-
-	return __res;
-}
-#endif /* __ASM_SH_MUTEX_LLSC_H */
diff --git a/arch/sh/include/asm/mutex.h b/arch/sh/include/asm/mutex.h
deleted file mode 100644
index d8e37716a4a0..000000000000
--- a/arch/sh/include/asm/mutex.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/*
- * 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)
- */
-#if defined(CONFIG_CPU_SH4A)
-#include <asm/mutex-llsc.h>
-#else
-#include <asm-generic/mutex-dec.h>
-#endif