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Bob Mottram
2016-03-09 14:54:39 +00:00
parent 01bdb9270a
commit 91a5351031
1 changed files with 7 additions and 6 deletions
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13
LKMPG-3.16.html
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@@ -3,7 +3,7 @@
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<!-- 2016-03-09 Wed 14:47 -->
<!-- 2016-03-09 Wed 14:54 -->
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>The Linux Kernel Module Programming Guide</title>
@@ -2654,13 +2654,14 @@ MODULE_AUTHOR(<span class="org-string">"Bob Mottram"</span>);
<span class="org-keyword">static</span> <span class="org-keyword">struct</span> <span class="org-type">kobj_attribute</span> <span class="org-variable-name">myvariable_attribute</span> =
__ATTR(myvariable, 0660, myvariable_show, myvariable_store);
__ATTR(myvariable, 0660, myvariable_show,
myvariable_store);
<span class="org-keyword">static</span> <span class="org-type">int</span> <span class="org-function-name">__init</span> mymodule_init (<span class="org-type">void</span>)
{
<span class="org-type">int</span> <span class="org-variable-name">error</span> = 0;
pr_debug(<span class="org-string">"mymodule: initialised\n"</span>);
printk(KERN_INFO <span class="org-string">"mymodule: initialised\n"</span>);
mymodule =
kobject_create_and_add(<span class="org-string">"mymodule"</span>, kernel_kobj);
@@ -2669,8 +2670,8 @@ MODULE_AUTHOR(<span class="org-string">"Bob Mottram"</span>);
error = sysfs_create_file(mymodule, &amp;myvariable_attribute.attr);
<span class="org-keyword">if</span> (error) {
pr_debug(<span class="org-string">"failed to create the myvariable file "</span> \
<span class="org-string">"in /sys/kernel/mymodule\n"</span>);
printk(KERN_INFO <span class="org-string">"failed to create the myvariable file "</span> \
<span class="org-string">"in /sys/kernel/mymodule\n"</span>);
}
<span class="org-keyword">return</span> error;
@@ -2678,7 +2679,7 @@ MODULE_AUTHOR(<span class="org-string">"Bob Mottram"</span>);
<span class="org-keyword">static</span> <span class="org-type">void</span> <span class="org-function-name">__exit</span> mymodule_exit (<span class="org-type">void</span>)
{
pr_debug (<span class="org-string">"mymodule: Exit success\n"</span>);
printk(KERN_INFO <span class="org-string">"mymodule: Exit success\n"</span>);
kobject_put(mymodule);
}