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>

1 files changed, 0 insertions, 132 deletions

diff --git a/arch/powerpc/include/asm/mutex.h b/arch/powerpc/include/asm/mutex.h
deleted file mode 100644
index 078155fa1189..000000000000
--- a/arch/powerpc/include/asm/mutex.h
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Optimised mutex implementation of include/asm-generic/mutex-dec.h algorithm
- */
-#ifndef _ASM_POWERPC_MUTEX_H
-#define _ASM_POWERPC_MUTEX_H
-
-static inline int __mutex_cmpxchg_lock(atomic_t *v, int old, int new)
-{
-        int t;
-
-        __asm__ __volatile__ (
-"1:     lwarx   %0,0,%1         # mutex trylock\n\
-        cmpw    0,%0,%2\n\
-        bne-    2f\n"
-        PPC405_ERR77(0,%1)
-"       stwcx.  %3,0,%1\n\
-        bne-    1b"
-        PPC_ACQUIRE_BARRIER
-        "\n\
-2:"
-        : "=&r" (t)
-        : "r" (&v->counter), "r" (old), "r" (new)
-        : "cc", "memory");
-
-        return t;
-}
-
-static inline int __mutex_dec_return_lock(atomic_t *v)
-{
-        int t;
-
-        __asm__ __volatile__(
-"1:     lwarx   %0,0,%1         # mutex lock\n\
-        addic   %0,%0,-1\n"
-        PPC405_ERR77(0,%1)
-"       stwcx.  %0,0,%1\n\
-        bne-    1b"
-        PPC_ACQUIRE_BARRIER
-        : "=&r" (t)
-        : "r" (&v->counter)
-        : "cc", "memory");
-
-        return t;
-}
-
-static inline int __mutex_inc_return_unlock(atomic_t *v)
-{
-        int t;
-
-        __asm__ __volatile__(
-        PPC_RELEASE_BARRIER
-"1:     lwarx   %0,0,%1         # mutex unlock\n\
-        addic   %0,%0,1\n"
-        PPC405_ERR77(0,%1)
-"       stwcx.  %0,0,%1 \n\
-        bne-    1b"
-        : "=&r" (t)
-        : "r" (&v->counter)
-        : "cc", "memory");
-
-        return t;
-}
-
-/**
- *  __mutex_fastpath_lock - try to take the lock by moving the count
- *                          from 1 to a 0 value
- *  @count: pointer of type atomic_t
- *  @fail_fn: function to call if the original value was not 1
- *
- * Change the count from 1 to a value lower than 1, and call <fail_fn> if
- * it wasn't 1 originally. This function MUST leave the value lower than
- * 1 even when the "1" assertion wasn't true.
- */
-static inline void
-__mutex_fastpath_lock(atomic_t *count, void (*fail_fn)(atomic_t *))
-{
-        if (unlikely(__mutex_dec_return_lock(count) < 0))
-                fail_fn(count);
-}
-
-/**
- *  __mutex_fastpath_lock_retval - try to take the lock by moving the count
- *                                 from 1 to a 0 value
- *  @count: pointer of type atomic_t
- *
- * Change the count from 1 to a value lower than 1. This function returns 0
- * if the fastpath succeeds, or -1 otherwise.
- */
-static inline int
-__mutex_fastpath_lock_retval(atomic_t *count)
-{
-        if (unlikely(__mutex_dec_return_lock(count) < 0))
-                return -1;
-        return 0;
-}
-
-/**
- *  __mutex_fastpath_unlock - try to promote the count from 0 to 1
- *  @count: pointer of type atomic_t
- *  @fail_fn: function to call if the original value was not 0
- *
- * Try to promote the count from 0 to 1. If it wasn't 0, call <fail_fn>.
- * In the failure case, this function is allowed to either set the value to
- * 1, or to set it to a value lower than 1.
- */
-static inline void
-__mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *))
-{
-        if (unlikely(__mutex_inc_return_unlock(count) <= 0))
-                fail_fn(count);
-}
-
-#define __mutex_slowpath_needs_to_unlock()              1
-
-/**
- * __mutex_fastpath_trylock - try to acquire the mutex, without waiting
- *
- *  @count: pointer of type atomic_t
- *  @fail_fn: fallback function
- *
- * Change the count from 1 to 0, and return 1 (success), or if the count
- * was not 1, then return 0 (failure).
- */
-static inline int
-__mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
-{
-        if (likely(atomic_read(count) == 1 && __mutex_cmpxchg_lock(count, 1, 0) == 1))
-                return 1;
-        return 0;
-}
-
-#endif