doc: fix broken references
[linux-2.6.git] / arch / alpha / kernel / srm_env.c
index d12af47..b9fc6c3 100644 (file)
@@ -4,9 +4,8 @@
  *
  * (C) 2001,2002,2006 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
  *
- * This driver is at all a modified version of Erik Mouw's
- * Documentation/DocBook/procfs_example.c, so: thank
- * you, Erik! He can be reached via email at
+ * This driver is a modified version of Erik Mouw's example proc
+ * interface, so: thank you, Erik! He can be reached via email at
  * <J.A.K.Mouw@its.tudelft.nl>. It is based on an idea
  * provided by DEC^WCompaq^WIntel's "Jumpstart" CD. They
  * included a patch like this as well. Thanks for idea!
  */
 
 #include <linux/kernel.h>
+#include <linux/gfp.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <asm/console.h>
 #include <asm/uaccess.h>
 #include <asm/machvec.h>
@@ -79,42 +80,41 @@ static srm_env_t    srm_named_entries[] = {
 static srm_env_t       srm_numbered_entries[256];
 
 
-static int
-srm_env_read(char *page, char **start, off_t off, int count, int *eof,
-               void *data)
+static int srm_env_proc_show(struct seq_file *m, void *v)
 {
-       int             nbytes;
        unsigned long   ret;
        srm_env_t       *entry;
+       char            *page;
 
-       if (off != 0) {
-               *eof = 1;
-               return 0;
-       }
+       entry = m->private;
+       page = (char *)__get_free_page(GFP_USER);
+       if (!page)
+               return -ENOMEM;
 
-       entry   = (srm_env_t *) data;
-       ret     = callback_getenv(entry->id, page, count);
+       ret = callback_getenv(entry->id, page, PAGE_SIZE);
 
        if ((ret >> 61) == 0) {
-               nbytes = (int) ret;
-               *eof = 1;
+               seq_write(m, page, ret);
+               ret = 0;
        } else
-               nbytes = -EFAULT;
+               ret = -EFAULT;
+       free_page((unsigned long)page);
+       return ret;
+}
 
-       return nbytes;
+static int srm_env_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, srm_env_proc_show, PDE(inode)->data);
 }
 
-static int
-srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
-               void *data)
+static ssize_t srm_env_proc_write(struct file *file, const char __user *buffer,
+                                 size_t count, loff_t *pos)
 {
        int res;
-       srm_env_t       *entry;
+       srm_env_t       *entry = PDE(file->f_path.dentry->d_inode)->data;
        char            *buf = (char *) __get_free_page(GFP_USER);
        unsigned long   ret1, ret2;
 
-       entry = (srm_env_t *) data;
-
        if (!buf)
                return -ENOMEM;
 
@@ -140,6 +140,15 @@ srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
        return res;
 }
 
+static const struct file_operations srm_env_proc_fops = {
+       .owner          = THIS_MODULE,
+       .open           = srm_env_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+       .write          = srm_env_proc_write,
+};
+
 static void
 srm_env_cleanup(void)
 {
@@ -245,15 +254,10 @@ srm_env_init(void)
         */
        entry = srm_named_entries;
        while (entry->name && entry->id) {
-               entry->proc_entry = create_proc_entry(entry->name,
-                               0644, named_dir);
+               entry->proc_entry = proc_create_data(entry->name, 0644, named_dir,
+                                                    &srm_env_proc_fops, entry);
                if (!entry->proc_entry)
                        goto cleanup;
-
-               entry->proc_entry->data         = (void *) entry;
-               entry->proc_entry->read_proc    = srm_env_read;
-               entry->proc_entry->write_proc   = srm_env_write;
-
                entry++;
        }
 
@@ -264,15 +268,12 @@ srm_env_init(void)
                entry = &srm_numbered_entries[var_num];
                entry->name = number[var_num];
 
-               entry->proc_entry = create_proc_entry(entry->name,
-                               0644, numbered_dir);
+               entry->proc_entry = proc_create_data(entry->name, 0644, numbered_dir,
+                                                    &srm_env_proc_fops, entry);
                if (!entry->proc_entry)
                        goto cleanup;
 
                entry->id                       = var_num;
-               entry->proc_entry->data         = (void *) entry;
-               entry->proc_entry->read_proc    = srm_env_read;
-               entry->proc_entry->write_proc   = srm_env_write;
        }
 
        printk(KERN_INFO "%s: version %s loaded successfully\n", NAME,