drivers/net/appletalk/ltpc.c: replace init_module&cleanup_module with module_init...

[safe/jmp/linux-2.6] / fs / jbd / journal.c

diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index 7edf3fd..3943a89 100644 (file)
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -35,6 +35,7 @@
 #include <linux/kthread.h>
 #include <linux/poison.h>
 #include <linux/proc_fs.h>
+#include <linux/debugfs.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
@@ -217,7 +218,7 @@ static int journal_start_thread(journal_t *journal)
        if (IS_ERR(t))
                return PTR_ERR(t);
 
-       wait_event(journal->j_wait_done_commit, journal->j_task != 0);
+       wait_event(journal->j_wait_done_commit, journal->j_task != NULL);
        return 0;
 }
 
@@ -229,7 +230,8 @@ static void journal_kill_thread(journal_t *journal)
        while (journal->j_task) {
                wake_up(&journal->j_wait_commit);
                spin_unlock(&journal->j_state_lock);
-               wait_event(journal->j_wait_done_commit, journal->j_task == 0);
+               wait_event(journal->j_wait_done_commit,
+                               journal->j_task == NULL);
                spin_lock(&journal->j_state_lock);
        }
        spin_unlock(&journal->j_state_lock);
@@ -653,10 +655,9 @@ static journal_t * journal_init_common (void)
        journal_t *journal;
        int err;
 
-       journal = jbd_kmalloc(sizeof(*journal), GFP_KERNEL);
+       journal = kzalloc(sizeof(*journal), GFP_KERNEL);
        if (!journal)
                goto fail;
-       memset(journal, 0, sizeof(*journal));
 
        init_waitqueue_head(&journal->j_wait_transaction_locked);
        init_waitqueue_head(&journal->j_wait_logspace);
@@ -1456,7 +1457,7 @@ static const char *journal_dev_name(journal_t *journal, char *buffer)
  * Aborts hard --- we mark the abort as occurred, but do _nothing_ else,
  * and don't attempt to make any other journal updates.
  */
-void __journal_abort_hard(journal_t *journal)
+static void __journal_abort_hard(journal_t *journal)
 {
        transaction_t *transaction;
        char b[BDEVNAME_SIZE];
@@ -1607,15 +1608,6 @@ int journal_blocks_per_page(struct inode *inode)
 }
 
 /*
- * Simple support for retrying memory allocations.  Introduced to help to
- * debug different VM deadlock avoidance strategies.
- */
-void * __jbd_kmalloc (const char *where, size_t size, gfp_t flags, int retry)
-{
-       return kmalloc(size, flags | (retry ? __GFP_NOFAIL : 0));
-}
-
-/*
  * Journal_head storage management
  */
 static struct kmem_cache *journal_head_cache;
@@ -1660,14 +1652,14 @@ static struct journal_head *journal_alloc_journal_head(void)
        atomic_inc(&nr_journal_heads);
 #endif
        ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
-       if (ret == 0) {
+       if (ret == NULL) {
                jbd_debug(1, "out of memory for journal_head\n");
                if (time_after(jiffies, last_warning + 5*HZ)) {
                        printk(KERN_NOTICE "ENOMEM in %s, retrying.\n",
                               __FUNCTION__);
                        last_warning = jiffies;
                }
-               while (ret == 0) {
+               while (ret == NULL) {
                        yield();
                        ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
                }
@@ -1860,64 +1852,41 @@ void journal_put_journal_head(struct journal_head *jh)
 }
 
 /*
- * /proc tunables
+ * debugfs tunables
  */
-#if defined(CONFIG_JBD_DEBUG)
-int journal_enable_debug;
-EXPORT_SYMBOL(journal_enable_debug);
-#endif
+#ifdef CONFIG_JBD_DEBUG
 
-#if defined(CONFIG_JBD_DEBUG) && defined(CONFIG_PROC_FS)
+u8 journal_enable_debug __read_mostly;
+EXPORT_SYMBOL(journal_enable_debug);
 
-static struct proc_dir_entry *proc_jbd_debug;
+static struct dentry *jbd_debugfs_dir;
+static struct dentry *jbd_debug;
 
-static int read_jbd_debug(char *page, char **start, off_t off,
-                         int count, int *eof, void *data)
+static void __init jbd_create_debugfs_entry(void)
 {
-       int ret;
-
-       ret = sprintf(page + off, "%d\n", journal_enable_debug);
-       *eof = 1;
-       return ret;
+       jbd_debugfs_dir = debugfs_create_dir("jbd", NULL);
+       if (jbd_debugfs_dir)
+               jbd_debug = debugfs_create_u8("jbd-debug", S_IRUGO,
+                                              jbd_debugfs_dir,
+                                              &journal_enable_debug);
 }
 
-static int write_jbd_debug(struct file *file, const char __user *buffer,
-                          unsigned long count, void *data)
+static void __exit jbd_remove_debugfs_entry(void)
 {
-       char buf[32];
-
-       if (count > ARRAY_SIZE(buf) - 1)
-               count = ARRAY_SIZE(buf) - 1;
-       if (copy_from_user(buf, buffer, count))
-               return -EFAULT;
-       buf[ARRAY_SIZE(buf) - 1] = '\0';
-       journal_enable_debug = simple_strtoul(buf, NULL, 10);
-       return count;
+       debugfs_remove(jbd_debug);
+       debugfs_remove(jbd_debugfs_dir);
 }
 
-#define JBD_PROC_NAME "sys/fs/jbd-debug"
+#else
 
-static void __init create_jbd_proc_entry(void)
+static inline void jbd_create_debugfs_entry(void)
 {
-       proc_jbd_debug = create_proc_entry(JBD_PROC_NAME, 0644, NULL);
-       if (proc_jbd_debug) {
-               /* Why is this so hard? */
-               proc_jbd_debug->read_proc = read_jbd_debug;
-               proc_jbd_debug->write_proc = write_jbd_debug;
-       }
 }
 
-static void __exit remove_jbd_proc_entry(void)
+static inline void jbd_remove_debugfs_entry(void)
 {
-       if (proc_jbd_debug)
-               remove_proc_entry(JBD_PROC_NAME, NULL);
 }
 
-#else
-
-#define create_jbd_proc_entry() do {} while (0)
-#define remove_jbd_proc_entry() do {} while (0)
-
 #endif
 
 struct kmem_cache *jbd_handle_cache;
@@ -1974,7 +1943,7 @@ static int __init journal_init(void)
        ret = journal_init_caches();
        if (ret != 0)
                journal_destroy_caches();
-       create_jbd_proc_entry();
+       jbd_create_debugfs_entry();
        return ret;
 }
 
@@ -1985,7 +1954,7 @@ static void __exit journal_exit(void)
        if (n)
                printk(KERN_EMERG "JBD: leaked %d journal_heads!\n", n);
 #endif
-       remove_jbd_proc_entry();
+       jbd_remove_debugfs_entry();
        journal_destroy_caches();
 }