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-rw-r--r--arch/ppc/lib/Makefile2
-rw-r--r--arch/ppc/lib/dec_and_lock.c38
2 files changed, 1 insertions, 39 deletions
diff --git a/arch/ppc/lib/Makefile b/arch/ppc/lib/Makefile
index f1e1fb4144f0..50358e4ea159 100644
--- a/arch/ppc/lib/Makefile
+++ b/arch/ppc/lib/Makefile
@@ -2,7 +2,7 @@
2# Makefile for ppc-specific library files.. 2# Makefile for ppc-specific library files..
3# 3#
4 4
5obj-y := checksum.o string.o strcase.o dec_and_lock.o div64.o 5obj-y := checksum.o string.o strcase.o div64.o
6 6
7obj-$(CONFIG_8xx) += rheap.o 7obj-$(CONFIG_8xx) += rheap.o
8obj-$(CONFIG_CPM2) += rheap.o 8obj-$(CONFIG_CPM2) += rheap.o
diff --git a/arch/ppc/lib/dec_and_lock.c b/arch/ppc/lib/dec_and_lock.c
deleted file mode 100644
index b18f0d9a00fc..000000000000
--- a/arch/ppc/lib/dec_and_lock.c
+++ /dev/null
@@ -1,38 +0,0 @@
1#include <linux/module.h>
2#include <linux/spinlock.h>
3#include <asm/atomic.h>
4#include <asm/system.h>
5
6/*
7 * This is an implementation of the notion of "decrement a
8 * reference count, and return locked if it decremented to zero".
9 *
10 * This implementation can be used on any architecture that
11 * has a cmpxchg, and where atomic->value is an int holding
12 * the value of the atomic (i.e. the high bits aren't used
13 * for a lock or anything like that).
14 */
15int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
16{
17 int counter;
18 int newcount;
19
20 for (;;) {
21 counter = atomic_read(atomic);
22 newcount = counter - 1;
23 if (!newcount)
24 break; /* do it the slow way */
25
26 newcount = cmpxchg(&atomic->counter, counter, newcount);
27 if (newcount == counter)
28 return 0;
29 }
30
31 spin_lock(lock);
32 if (atomic_dec_and_test(atomic))
33 return 1;
34 spin_unlock(lock);
35 return 0;
36}
37
38EXPORT_SYMBOL(_atomic_dec_and_lock);