drm: fix irq naming for kms drivers.
[linux-2.6] / fs / gfs2 / main.c
1 /*
2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
4  *
5  * This copyrighted material is made available to anyone wishing to use,
6  * modify, copy, or redistribute it subject to the terms and conditions
7  * of the GNU General Public License version 2.
8  */
9
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <asm/atomic.h>
18
19 #include "gfs2.h"
20 #include "incore.h"
21 #include "super.h"
22 #include "sys.h"
23 #include "util.h"
24 #include "glock.h"
25 #include "quota.h"
26
27 static struct shrinker qd_shrinker = {
28         .shrink = gfs2_shrink_qd_memory,
29         .seeks = DEFAULT_SEEKS,
30 };
31
32 static void gfs2_init_inode_once(void *foo)
33 {
34         struct gfs2_inode *ip = foo;
35
36         inode_init_once(&ip->i_inode);
37         init_rwsem(&ip->i_rw_mutex);
38         INIT_LIST_HEAD(&ip->i_trunc_list);
39         ip->i_alloc = NULL;
40 }
41
42 static void gfs2_init_glock_once(void *foo)
43 {
44         struct gfs2_glock *gl = foo;
45
46         INIT_HLIST_NODE(&gl->gl_list);
47         spin_lock_init(&gl->gl_spin);
48         INIT_LIST_HEAD(&gl->gl_holders);
49         INIT_LIST_HEAD(&gl->gl_lru);
50         INIT_LIST_HEAD(&gl->gl_ail_list);
51         atomic_set(&gl->gl_ail_count, 0);
52 }
53
54 /**
55  * init_gfs2_fs - Register GFS2 as a filesystem
56  *
57  * Returns: 0 on success, error code on failure
58  */
59
60 static int __init init_gfs2_fs(void)
61 {
62         int error;
63
64         error = gfs2_sys_init();
65         if (error)
66                 return error;
67
68         error = gfs2_glock_init();
69         if (error)
70                 goto fail;
71
72         error = -ENOMEM;
73         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
74                                               sizeof(struct gfs2_glock),
75                                               0, 0,
76                                               gfs2_init_glock_once);
77         if (!gfs2_glock_cachep)
78                 goto fail;
79
80         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
81                                               sizeof(struct gfs2_inode),
82                                               0,  SLAB_RECLAIM_ACCOUNT|
83                                                   SLAB_MEM_SPREAD,
84                                               gfs2_init_inode_once);
85         if (!gfs2_inode_cachep)
86                 goto fail;
87
88         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
89                                                 sizeof(struct gfs2_bufdata),
90                                                 0, 0, NULL);
91         if (!gfs2_bufdata_cachep)
92                 goto fail;
93
94         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
95                                               sizeof(struct gfs2_rgrpd),
96                                               0, 0, NULL);
97         if (!gfs2_rgrpd_cachep)
98                 goto fail;
99
100         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
101                                                sizeof(struct gfs2_quota_data),
102                                                0, 0, NULL);
103         if (!gfs2_quotad_cachep)
104                 goto fail;
105
106         register_shrinker(&qd_shrinker);
107
108         error = register_filesystem(&gfs2_fs_type);
109         if (error)
110                 goto fail;
111
112         error = register_filesystem(&gfs2meta_fs_type);
113         if (error)
114                 goto fail_unregister;
115
116         gfs2_register_debugfs();
117
118         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
119
120         return 0;
121
122 fail_unregister:
123         unregister_filesystem(&gfs2_fs_type);
124 fail:
125         unregister_shrinker(&qd_shrinker);
126         gfs2_glock_exit();
127
128         if (gfs2_quotad_cachep)
129                 kmem_cache_destroy(gfs2_quotad_cachep);
130
131         if (gfs2_rgrpd_cachep)
132                 kmem_cache_destroy(gfs2_rgrpd_cachep);
133
134         if (gfs2_bufdata_cachep)
135                 kmem_cache_destroy(gfs2_bufdata_cachep);
136
137         if (gfs2_inode_cachep)
138                 kmem_cache_destroy(gfs2_inode_cachep);
139
140         if (gfs2_glock_cachep)
141                 kmem_cache_destroy(gfs2_glock_cachep);
142
143         gfs2_sys_uninit();
144         return error;
145 }
146
147 /**
148  * exit_gfs2_fs - Unregister the file system
149  *
150  */
151
152 static void __exit exit_gfs2_fs(void)
153 {
154         unregister_shrinker(&qd_shrinker);
155         gfs2_glock_exit();
156         gfs2_unregister_debugfs();
157         unregister_filesystem(&gfs2_fs_type);
158         unregister_filesystem(&gfs2meta_fs_type);
159
160         kmem_cache_destroy(gfs2_quotad_cachep);
161         kmem_cache_destroy(gfs2_rgrpd_cachep);
162         kmem_cache_destroy(gfs2_bufdata_cachep);
163         kmem_cache_destroy(gfs2_inode_cachep);
164         kmem_cache_destroy(gfs2_glock_cachep);
165
166         gfs2_sys_uninit();
167 }
168
169 MODULE_DESCRIPTION("Global File System");
170 MODULE_AUTHOR("Red Hat, Inc.");
171 MODULE_LICENSE("GPL");
172
173 module_init(init_gfs2_fs);
174 module_exit(exit_gfs2_fs);
175