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-rw-r--r--arch/frv/kernel/Makefile2
-rw-r--r--arch/frv/kernel/frv_ksyms.c1
-rw-r--r--arch/frv/kernel/semaphore.c155
3 files changed, 1 insertions, 157 deletions
diff --git a/arch/frv/kernel/Makefile b/arch/frv/kernel/Makefile
index e8f73ed28b52..c36f70b6699a 100644
--- a/arch/frv/kernel/Makefile
+++ b/arch/frv/kernel/Makefile
@@ -9,7 +9,7 @@ extra-y:= head.o init_task.o vmlinux.lds
9 9
10obj-y := $(heads-y) entry.o entry-table.o break.o switch_to.o kernel_thread.o \ 10obj-y := $(heads-y) entry.o entry-table.o break.o switch_to.o kernel_thread.o \
11 kernel_execve.o process.o traps.o ptrace.o signal.o dma.o \ 11 kernel_execve.o process.o traps.o ptrace.o signal.o dma.o \
12 sys_frv.o time.o semaphore.o setup.o frv_ksyms.o \ 12 sys_frv.o time.o setup.o frv_ksyms.o \
13 debug-stub.o irq.o sleep.o uaccess.o 13 debug-stub.o irq.o sleep.o uaccess.o
14 14
15obj-$(CONFIG_GDBSTUB) += gdb-stub.o gdb-io.o 15obj-$(CONFIG_GDBSTUB) += gdb-stub.o gdb-io.o
diff --git a/arch/frv/kernel/frv_ksyms.c b/arch/frv/kernel/frv_ksyms.c
index f772704b3d28..0316b3c50eff 100644
--- a/arch/frv/kernel/frv_ksyms.c
+++ b/arch/frv/kernel/frv_ksyms.c
@@ -12,7 +12,6 @@
12#include <asm/pgalloc.h> 12#include <asm/pgalloc.h>
13#include <asm/irq.h> 13#include <asm/irq.h>
14#include <asm/io.h> 14#include <asm/io.h>
15#include <asm/semaphore.h>
16#include <asm/checksum.h> 15#include <asm/checksum.h>
17#include <asm/hardirq.h> 16#include <asm/hardirq.h>
18#include <asm/cacheflush.h> 17#include <asm/cacheflush.h>
diff --git a/arch/frv/kernel/semaphore.c b/arch/frv/kernel/semaphore.c
deleted file mode 100644
index 7ee3a147b471..000000000000
--- a/arch/frv/kernel/semaphore.c
+++ /dev/null
@@ -1,155 +0,0 @@
1/* semaphore.c: FR-V semaphores
2 *
3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 * - Derived from lib/rwsem-spinlock.c
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#include <linux/sched.h>
14#include <linux/module.h>
15#include <asm/semaphore.h>
16
17struct sem_waiter {
18 struct list_head list;
19 struct task_struct *task;
20};
21
22#ifdef CONFIG_DEBUG_SEMAPHORE
23void semtrace(struct semaphore *sem, const char *str)
24{
25 if (sem->debug)
26 printk("[%d] %s({%d,%d})\n",
27 current->pid,
28 str,
29 sem->counter,
30 list_empty(&sem->wait_list) ? 0 : 1);
31}
32#else
33#define semtrace(SEM,STR) do { } while(0)
34#endif
35
36/*
37 * wait for a token to be granted from a semaphore
38 * - entered with lock held and interrupts disabled
39 */
40void __down(struct semaphore *sem, unsigned long flags)
41{
42 struct task_struct *tsk = current;
43 struct sem_waiter waiter;
44
45 semtrace(sem, "Entering __down");
46
47 /* set up my own style of waitqueue */
48 waiter.task = tsk;
49 get_task_struct(tsk);
50
51 list_add_tail(&waiter.list, &sem->wait_list);
52
53 /* we don't need to touch the semaphore struct anymore */
54 spin_unlock_irqrestore(&sem->wait_lock, flags);
55
56 /* wait to be given the semaphore */
57 set_task_state(tsk, TASK_UNINTERRUPTIBLE);
58
59 for (;;) {
60 if (list_empty(&waiter.list))
61 break;
62 schedule();
63 set_task_state(tsk, TASK_UNINTERRUPTIBLE);
64 }
65
66 tsk->state = TASK_RUNNING;
67 semtrace(sem, "Leaving __down");
68}
69
70EXPORT_SYMBOL(__down);
71
72/*
73 * interruptibly wait for a token to be granted from a semaphore
74 * - entered with lock held and interrupts disabled
75 */
76int __down_interruptible(struct semaphore *sem, unsigned long flags)
77{
78 struct task_struct *tsk = current;
79 struct sem_waiter waiter;
80 int ret;
81
82 semtrace(sem,"Entering __down_interruptible");
83
84 /* set up my own style of waitqueue */
85 waiter.task = tsk;
86 get_task_struct(tsk);
87
88 list_add_tail(&waiter.list, &sem->wait_list);
89
90 /* we don't need to touch the semaphore struct anymore */
91 set_task_state(tsk, TASK_INTERRUPTIBLE);
92
93 spin_unlock_irqrestore(&sem->wait_lock, flags);
94
95 /* wait to be given the semaphore */
96 ret = 0;
97 for (;;) {
98 if (list_empty(&waiter.list))
99 break;
100 if (unlikely(signal_pending(current)))
101 goto interrupted;
102 schedule();
103 set_task_state(tsk, TASK_INTERRUPTIBLE);
104 }
105
106 out:
107 tsk->state = TASK_RUNNING;
108 semtrace(sem, "Leaving __down_interruptible");
109 return ret;
110
111 interrupted:
112 spin_lock_irqsave(&sem->wait_lock, flags);
113
114 if (!list_empty(&waiter.list)) {
115 list_del(&waiter.list);
116 ret = -EINTR;
117 }
118
119 spin_unlock_irqrestore(&sem->wait_lock, flags);
120 if (ret == -EINTR)
121 put_task_struct(current);
122 goto out;
123}
124
125EXPORT_SYMBOL(__down_interruptible);
126
127/*
128 * release a single token back to a semaphore
129 * - entered with lock held and interrupts disabled
130 */
131void __up(struct semaphore *sem)
132{
133 struct task_struct *tsk;
134 struct sem_waiter *waiter;
135
136 semtrace(sem,"Entering __up");
137
138 /* grant the token to the process at the front of the queue */
139 waiter = list_entry(sem->wait_list.next, struct sem_waiter, list);
140
141 /* We must be careful not to touch 'waiter' after we set ->task = NULL.
142 * It is allocated on the waiter's stack and may become invalid at
143 * any time after that point (due to a wakeup from another source).
144 */
145 list_del_init(&waiter->list);
146 tsk = waiter->task;
147 mb();
148 waiter->task = NULL;
149 wake_up_process(tsk);
150 put_task_struct(tsk);
151
152 semtrace(sem,"Leaving __up");
153}
154
155EXPORT_SYMBOL(__up);
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